Transcript Why is balloon frame construction rarely used today?

Module 27105-06
Floor Systems
1. What is the name of the type of construction where each
floor of a structure is built as an individual unit (Page 5.2,
Section 2.1.0)?
Answer
Platform or western or box frame
2. Why is balloon frame construction rarely used today
(Page 5.4, Section 2.3.0)?
Answer
Because of lumber and labor costs (too expensive)
3. What architectural drawings have information relevant to
building the floor assembly (Page 5.7-11, Section 3.1.13.2.0)?
Answer
Foundation plan, Floor plan, Section and Detail
drawings, Structural drawings, and plumbing,
mechanical, and electrical plans
4. What plan would most likely contain the information
needed to correctly position the opening in the floor for a
stairway (Page 5.7, Section 3.1.2)?
Answer
Floor Plan
5. Where, on a set of plans, would you look for the quality
of materials and methods of construction for a floor
assembly (Page 5.12, Section 3.4.0)?
Answer
Specifications
6. What type of lumber are floor sills are normally made
from (Page 5.12, Section 4.1.0)?
Answer
A single layer of 2 X 6 lumber
7. What is the framing member that the letter H is pointing
to (Page 5.13, Section 4.0.0 Figure 6)?
1 5 1 /4 "
H
16"
16"
16"
16"
16"
16"
16"
16"
Answer
Sheathing
8. What is the framing member that the letter C is pointing
to (Page 5.13, Section 4.0.0 Figure 6)?
1 5 1 /4 "
16"
16"
16"
16"
16"
16"
16"
16"
C
Answer
Double Joist
9. What is the framing member that the letter G is pointing
to (Page 5.13, Section 4.0.0 Figure 6)?
1 5 1 /4 "
16"
16"
16"
16"
16"
16"
16"
16"
Answer
Cross or
Wood “X”
bridging
G
10. What is the framing member that the letter N is
pointing to (Page 5.13, Section 4.0.0 Figure 6)?
1 5 1 /4 "
16"
16"
16"
16"
16"
16"
16"
16"
Answer
Anchor bolt
N
11. What is the framing member that the letter Q is
pointing to (Page 5.13, Section 4.0.0 Figure 6)?
1 5 1 /4 "
16"
16"
16"
16"
16"
Q
16"
16"
16"
Answer
Solid
Bridging
12. What is the framing member that the letter E is
pointing to (Page 5.13, Section 4.0.0 Figure 6)?
1 5 1 /4 "
16"
16"
16"
16"
16"
16"
16"
16"
Answer
Joist
Hanger
E
13. What is the framing member that the letter D is
pointing to (Page 5.13, Section 4.0.0 Figure 6)?
1 5 1 /4 "
16"
16"
16"
16"
16"
16"
16"
16"
Answer
Girder
D
14. What is the framing member that the letter A is
pointing to (Page 5.13, Section 4.0.0 Figure 6)?
1 5 1 /4 "
16"
16"
16"
16"
16"
16"
16"
16"
Answer
Pier
A
15. For a given size, what type of support has the most
strength (Page 5.16, Section 4.2.4)?
Answer
Steel I-Beam?
16. What is the rule of thumb for constructing girder
pockets (Page 5.18, Section 4.2.5)?
Answer
Be 1” wider than the beam and the beam must have
4” of bearing on the wall
17. Describe how wooden joists are normally placed in
relation to their centers and their crown (Page 5.20,
Section 4.3.0)?
Answer
Crown (curve) up and 16” from joist center to next
joist center (16” O.C. - on center)
18. What does the term dead load refer to (Page 5.20,
Section 4.3.0)?
Answer
The weight of permanent, stationary construction
and equipment included in a building exerting a
downward force on the building or framing member.
18. What type of floor joist has the most strength for a
given length and size (Page 5.24, Section 4.3.3)?
Answer
Truss with a steel web
20. What is the interval distance that most building codes
require that bridging be installed in rows between floor
joists (Page 5.24, Section 4.4.0)?
Answer
Intervals of no more than 8’. For spans from 8’to 16’
one row required
21. What is underlayment (Page 5.25, Section 4.5.0)?
Answer
Material such as particleboard or plywood installed
over the top of the subfloor to provide a smoother
surface for finish floor materials.
22. What type of fastener should be selected to fasten
wood cross-bridging and subfloor material (Page 5.30,
Section 5.3.0)?
Answer
8d nail
23. What type of fastener should be selected to fasten
headers to joists (Page 5.30, Section 5.3.0)?
Answer
16d nail
24. What measuring tool can be used to lay out the angles
of wood “X” bridging (Page 5.37, Section 5.10.0)?
Answer
Framing Square
25. How far apart should the nails be spaced along the
edges of sheathing (Page 5.37, Section 5.10.0)?
Answer
6” apart
Refer to the illustration to answer the following questions.
When you see a statement like this…
imagine this and…
Sill
Beam
or
Girder
Pier
Foundation
this and…
Solid
Bridging
Joist
this!
Sheathing
26. How many lineal feet of 2 X 6 sill material would be
needed (Page 5.40, Section 7.1.0)?
Answer
Perimeter – total of the length of the 4 sides (2 X 52’)+(2 X 32’) = 168’
27. How many lineal feet of 2 X 12s are needed for the
beam (girder) (Page 5.40, Section 7.2.0)?
Answer
Length X 3 – (3 X 52’) = 156’
28. How many 2 X 8 joists are needed if the joists are
spaced 16" OC (Page 5.40, Section 7.3.0)?
Answer
Use formula – (3/4L +1) where L equals building length.
Because joists will only reach 16’ and the floor is 32’ wide
the result must be multiplied by 2. So, 2(3/4L+1)……..
2((3/4 X 52)+1) = 2(39 +1) = 2(40 ) = 80 joists
29. How many lineal feet of 2 X 8s are needed for the joist
headers (Page 5.40, Section 7.3.0)?
Answer
Length of one side + length of other side (at the head or
end of the joists) 2(L)… 2(52’) = 104’
30. How many lineal feet of 2 X 8s are needed for solid
bridging (Page 5.41, Section 7.4.0)?
Answer
Joist span is 16’ or less so one row is needed for each set
of joists from sill to girder. 2(L)… 2(52’) = 104’
31. How many 4' X 8' panels of subflooring are needed (Page
5.41, Section 7.5.0)?
Answer
Surface area = L X W for a rectangle so 52’ X 32’ = 1664
sq. ft.. Divide that by the number of sq. ft. of surface in
on one panel of sheathing (4’ X 8’ = 32 sq. ft.) 1664 sq. ft.
/ 32 sq. ft. = 52 panels needed
End of
Presentation