Transcript Running an arch in situ

Running an arch in situ
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A opening was made to
allow access to the new
study
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A opening
was made
to allow
access to
the new
study
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Plasterboards were fixed
over the wall area
The width of
the opening
was drawn on
the surface of
the
plasterboard
Using a piece of
string and a
pencil The arch
was spun from
the centre point
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Using a pad saw the arch was carefully cut out
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Plasterboards have been
fixed to the inside of the
arch
A coat of thistle
bonding has been
applied to level up
the board, and
marry into exiting
plaster surface
Thin coat
beads
fitted to
the arris
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•A coat of finishing plaster has
been applied
•The surfaces have been
married together
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Top of the arch
R=14.5”
Spring line
D = 29
”
R = Radius
D = Diameter
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Dry wall screws
used as anchor
points
R=14.5”
Pivot point
R=14.5”
R=14.5”
Centre for the
fishtail gig stick
D = 29
Springing board
R = Radius
D = Diameter
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Angle Mould
Slipper
Stock
Template
gig stick with fishtail
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Dry wall screws
used as anchor
points
The slipper and
gig stick are flush
with the wall
Pivot point
Centre for the
fishtail gig stick
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The mould is
built up with
three coat of
plaster
•The angle mould is passed over the
plaster
•Make sure that the mould is flush to
the wall and the fishtail is located on
the pivot point
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The mould is nearly built up
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The mould has
been cut of at the
spring line
The mould has been
cut of at the spring
line
•The semi circular arch is now run
•The springing board has been
removed
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Running the styles
Relocate the
angle mould on
the finished
section
When the mould
is located fix the
running rule with
drywall screws
Then plumb
down the rule
and fix
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Twin slipper mould
•Alterations have been to
the angle mould
•The gig stick has been
removed, and a second
slipper has been added
•This will give the mould
stability for running up the
rule
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•The gig stick has been
removed, and a second slipper
has been added
To gauge the distance between
the slippers a piece of the
running rule has been used
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•Again the mould
is built up with
three coats of
plaster
•The mould is run
up and down the
running rule
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•When the mould is
run
•The running rule is
removed
•The joint at the spring
line is worked with a
small tool and joint rule
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The same process is
repeated on the other
style
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