Technical Specifications

P. 16
Cantilever Details for Vertical Building Offset (Concentrated Wall Load)
FIGURE 5C
Cantilever Reinforcement Methods
TABLE 8
P3 Joist Cantilever Reinforcement Methods Allowed
Source: APA
Joist
Depth
(in�)
Roof
Truss
Span
(ft)
ROOF LOADINGS
TL = 35 psf
LL not to exceed 20 psf
Joist Spacing (in�)
TL = 45 psf
LL not to exceed 30 psf
Joist Spacing (in�)
TL = 55 psf
LL not to exceed 40 psf
Joist Spacing (in�)
12 16 19�2 24 12 16 19�2 24 12 16 19�2 24
9-1/2
26 N N N 1 N N 1 2 N 1 2 X
28 N N N 1 N N 1 2 N 1 2 X
30 N N 1 1 N N 1 2 N 1 2 X
32 N N 1 2 N 1 1 X N 1 2 X
34 N N 1 2 N 1 2 X N 2 X X
36 N N 1 2 N 1 2 X N 2 X X
11-7/8
26 N N N 1 N N 1 1 N 1 1 2
28 N N 1 1 N 1 1 1 N 1 1 2
30 N N 1 1 N 1 1 2 N 1 1 2
32 N N 1 1 N 1 1 2 N 1 1 2
34 N N 1 1 N 1 1 2 N 1 2 2
36 N N 1 1 N 1 1 2 N 1 2 2
38 N 1 1 2 N 1 1 2 1 1 2 X
14
26 N N N 1 N N N 1 N N 1 1
28 N N N 1 N N 1 1 N N 1 2
30 N N N 1 N N 1 1 N 1 1 2
32 N N N 1 N N 1 1 N 1 1 2
34 N N N 1 N N 1 2 N 1 1 2
36 N N 1 1 N 1 1 2 N 1 1 2
38 N N 1 1 N 1 1 2 N 1 1 2
40 N N 1 1 N 1 1 2 N 1 2 2
16
26 N N N 1 N N 1 1 N N 1 1
28 N N N 1 N N 1 1 N N 1 2
30 N N N 1 N N 1 1 N 1 1 2
32 N N N 1 N N 1 1 N 1 1 2
34 N N 1 1 N N 1 2 N 1 1 2
36 N N 1 1 N 1 1 2 N 1 1 2
38 N N 1 1 N 1
1 2 N 1 1 2
40 N N 1 1 N 1 1 2 N 1 2 2
42 N N 1 1 N 1 1 2 N 1 2 X
NOTES
1� N = No reinforcement required
1 = PJIs reinforced with 23/32” wood structural panel on one side only
2 = PJIs reinforced with 23/32” wood structural panel on both sides or double
P3 Joist
X = Try a deeper joist or closer spacing�
2� Color coding in table is matched to details in Figures 5a and 5b�
3� Maximum 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�
4� Table applies to joists 12” to 24” o�c� Use 12” o�c� requirements for lesser spacings�
5� For conventional roof construction using a ridge beam, the Roof Truss Span
column above is equivalent to the distance between the supporting wall and the
ridge beam� When the roof is framed using a ridge board, the Roof Truss Span
is equivalent to the distance between the supporting walls as if a truss is used�
P3 Joist CANTILEVER DETAIL – NOTES
See Table below for P3 Joist
reinforcement requirements
atcantilever�
For hip roofs with the hip trusses running parallel to the cantilevered floor
joists, the P3 Joist reinforcement requirements for a span of 26 ft� shallbe
permitted to be used�
Roof truss span
2’–0”
maximum
cantilever
2’–0”
maximum
cantilever
Roof truss span
Hip trusses
Roof trusses
Girder truss
13’–0” maximum