Slide 1

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 2

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 3

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 4

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 5

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 6

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 7

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 8

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 9

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 10

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 11

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 12

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 13

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 14

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 15

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 16

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 17

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 18

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 19

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 20

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 21

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 22

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.


Slide 23

PowerPoint® Presentation

Unit 64
Stairway Construction
Constructing Interior Stairways •
Installing Prefabricated Stairways •
Constructing Exterior Stairways

Unit 64 — Stairway Construction

The minimum clear
stairway width
above handrails is
36″. The clear width
at and below the
handrail depends on
the number of
handrails installed.

Unit 64 — Stairway Construction

Headroom is the minimum
vertical clearance required
and is measured from a
line connecting the nosings
on the stairway to any part
of the ceiling above the
stairway.

Unit 64 — Stairway Construction

The minimum headroom must
be maintained between parallel
flights of stairs.

Unit 64 — Stairway Construction

The maximum riser height for
residential stairways is 7 3/4″
and the maximum tread depth
is 10″.

Unit 64 — Stairway Construction

The minimum tread
depth at the line of
travel is 10″. The
narrowest portion of
the tread should not
be less than 6″ wide.

Unit 64 — Stairway Construction

Tread nosings are not
permitted to have a radius
larger than 9/16″. Beveled
nosings cannot be greater
than 1/2″ × 1/2″.

Unit 64 — Stairway Construction

Landings must be as
wide as the stairway
they serve and must
be at least 36″ wide.

Unit 64 — Stairway Construction

The top of a handrail must
be 34″ to 38″ above the
tread nosings.

Unit 64 — Stairway Construction

Type I or II handrails are required for residential
stairways.

Unit 64 — Stairway Construction

Minimum and maximum
dimensions for commercial
stairways are different than
those for residential stairways.

Unit 64 — Stairway Construction

The length of a stairwell opening
must be properly calculated to
ensure the proper amount of
headroom.

Unit 64 — Stairway Construction

A straight-flight stairway
runs directly between
different floor levels.

Unit 64 — Stairway Construction

When constructing an
L-shaped residential stairway
with a landing, the landing is
built first. Stringers from the
first floor to the landing, and
from the landing to the second
floor, are then installed.

Unit 64 — Stairway Construction

Winders are installed when space does
not allow a straight-flight stairway with
a landing.

Unit 64 — Stairway Construction

The line of travel
for a stairway with
winders is 12″.
Whenever possible,
the depth of a
winder tread at the
line of travel should
be the same as the
tread depth along
the straight-flight
section.

Unit 64 — Stairway Construction

Before a stairway is
installed, the winder section
is laid out to full scale in the
floor area where the
stairway is to be installed. In
this example, the line of
travel is 14″. The tread
depth along the winder and
straight-flight line of travel
will be 10″. The total width
of the stairway is 36″.

Unit 64 — Stairway Construction

Grooves in a housed
stringer are made with
a router.

Unit 64 — Stairway Construction

When assembling
a stairway with
housed stringers,
the risers and
treads are placed
in the grooves and
secured with glue
and wedges. Glue
blocks fasten the
bottoms of the
risers to the edges
of the treads.

Unit 64 — Stairway Construction

In a mitered stringer,
the corner joints of the
risers and the stringer
are mitered.

Unit 64 — Stairway Construction

An exterior stairway may be constructed of wood or
may be finished with nonwood materials.

Unit 64 — Stairway Construction

The steps of an exterior stairway may be finished with
enclosed treads and risers or the risers may remain open.

Unit 64 — Stairway Construction

Stairways must be properly
supported. The stairway in
this example is supported
by a concrete step at the
bottom, concrete piers, and
a 2 × 6 header at the top.