Georgia-Pacific Engineered Lumber Canada - Manual (Page 10)

10
GeorGia-Pacific Wood Products
JaN 2014
caNadiaN iNstallatioN iNstructioNs
Pa
Ge
Notes:
1. N= No reinforcement required.
1= I-Joists reinforced with
23 ⁄ 32 " wood structural panel
or Rim Board on one side only.
2= I-Joists reinforced with
23 ⁄ 32 " wood structural panel
or Rim Board on both sides,
or double I-Joist.
X= Try a deeper joist or
closer spacing.
2. Maximum unfactored load shall be: 15 psf roof dead load,
50 psf floor total load, and 80 plf wall load. Wall load is
based on 3'-0" maximum width window or door openings.
For larger openings, or multiple 3'-0" width openings spaced
less than 6'-0" o.c., additional joists beneath the opening’s
cripple studs may be required.
3. Table applies to joists 12" to 24" o.c. Use 12" o.c.
requirements for lesser spacings.
4. For conventional roof construction using a structural
ridge beam, the Roof Truss Span column above is equivalent to
the horizontal distance between the supporting wall and the
ridge beam. When the roof is framed using a ridge board
(non-structural ridge element), the Roof Truss Span is equivalent
to the horizontal distance between the supporting walls
as if a truss is used.
UNFACTORED ROOF DESIGN LOADS
Roof
Truss
Span
(ft.)
26
28
30
32
34
36
26
28
30
32
34
36
38
26
28
30
32
34
36
38
40
26
28
30
32
34
36
38
40
42
12 16 19.2 24 12 16 19.2 24 12 16 19.2 24
Joist
Depth
(in.)
9½"
11 7 /
8 "
14"
16"
TL= 35 psf
(Snow up to 20 psf, DL= 15 psf)
I-Joist Spacing (in.)
TL= 45 psf
(Snow up to 30 psf, DL= 15 psf)
I-Joist Spacing (in.)
TL= 55 psf
(Snow up to 40 psf, DL= 15 psf)
I-Joist Spacing (in.)
2'–0"
max.
Roof truss span
2'–0"
max.
Roof trusses 13'–0"
max.
Roof truss span
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N N
N
N
N
1
1
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
1
1
1
1
2
2
N
N
N
N
1
1
1
N
N
N
1
1
1
1
1
N
N
1
1
1
1
1
1
1
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N N
N
N
N
1
1
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
1
1
1
1
1
2
N
N
N
N
N
1
1
N
N
N
N
N
1
1
1
N
N
N
N
1
1
1
1
1
2
2
2
X
X
X
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
1
1
1
1
1
2
2
2
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N N
1
1
1
1
2
N
N
N
N
N
1
1
N
N
N
N
N
N
1
1
N
N
N
N
N
N
1
1
1
1
2
2
2
2
X
N
1
1
1
1
1
1
N
N
1
1
1
1
1
1
N
1
1
1
1
1
1
1
1
X
X
X
X
X
X
1
1
2
2
2
2
X
1
1
1
2
2
2
2
2
1
1
2
2
2
2
2
2
2
See Table below for
I-Joist reinforcement
requirements at cantilever.
Girder
truss
Hip
trusses
Floor spans in accordance with
tables in the product guide.
For hip roofs with the hip trusses running parallel to the
cantilevered floor joists, the I-Joist reinforcement requirements
for a span of 26 ft. shall be permitted to be used.
Cantilever reinforcement
cantilever reinforcement table