Installation Instructions

P. 11
P3 Joists may also be used in cantilever applications, supporting a concentrated load applied to the end of the
cantilever such as with a vertical building offset. For cantilever-end concentrated load applications that require
reinforcing based on Table 3, the cantilever is limited to 2’ maximum. In addition, blocking is required along
the cantilever support and is required for 4’ on each side of the cantilever area. Subject to the roof loads and
layout (see Table 3), three methods of reinforcing are allowed in load bearing cantilever applications: reinforcing
sheathing applied to one side of the P3 Joist (Method 1), reinforcing sheathing applied to both sides of the
P3Joist (Method 2), or double P3 Joist (Alternate Method 2).
NOTE APA RATED SHEATHING 48/24 (minimum thickness 23/32”) required on sides of joist. Depth shall match the full height of the joist. Nail top and bottom
flange with 2-1/2” nails at 6” o.c. Install with face grain running horizontally. Attach P3 Joist to plate at all supports per Detail 2b.
NOTES All nails shown in the details above are assumed to be common nails unless otherwise noted. Individual components are not shown to scale for clarity.
Alternate Method 2
Double P3 Joist
4’–0”
minimum
2’–0”
maximum
Block P3 Joists together with filler blocks for the full
length of the reinforcement. For P3 Joist flange widths
greater than 3”, place an additional row of 3” nails along
the centerline of the reinforcing panel from each side.
Clinchwhen possible.
Face nail two rows 3” at 12”o.c. each side through one
P3Joist web and the filler block to other P3 Joist web.
Offset nails from opposite face by 6” (Clinch if possible).
Atotal of 4 nails per foot is required. If nails can be clinched,
only 2 nails per foot are required.
P3 Joist blocking panel or
APA Rim Board blocking,
attach per detail 2g.
APA Rim Board or
wood structural
panel closure
(23/32” minimum
thickness)
Attach per detail 2b.
Attach P3 Joists to top plate
atall supports per Detail 2b.
3-1/2” min. bearing required
Cantilever Detail for Vertical Building Offset (Concentrated Wall Load)
FIGURE 5A
2’–0”
minimum
2’–0”
maximum
6”
Strength axis
Strength axis
Attach P3 Joist
toplate.
P3 Joist blocking panel or
APA Rim Board blocking
Attach per Detail 2g
APA Rim Board or wood
structural panel closure
(23/32” minimum thickness)
Attach per Detail 2b
Use same installation as Method 1, but reinforce both sides
of the P3 Joist with sheathing or APA Rim Board.
Use nailing pattern shown for Method 1
with opposite face nailing offset by 3”.
2-1/2” nails
3-1/2” min. bearing required
Method 1
Sheathing Reinforcement One Side
Method 2
Sheathing Reinforcement Two Sides