Technical Specifications

P. 21
FIGURE 7
(
CONTINUED
)
Typical P3 Joist Roof Framing and Construction Details
All nails shown in the details below are assumed to be common nails unless otherwise noted� 10d box nails
(0�128 x 3”) may be substituted for 8d common (0�131 x 2-1/2”) as shown in details� Individual components are
not shown to scale for clarity�
7f
7g
7h
7j
ROOF OPENING TOP MOUNTED HANGERS
ROOF OPENING, FACE
-
MOUNTED HANGERS
BIRDSMOUTH CUT & BEVEL CUT BEARING STIFFENER
BIRDSMOUTH CUT WITH OVERHANG 1/8” GAP AT TOP
(
PERMITTED ON LOW END OF P3 JOIST ONLY
)
Application limited to
4:12 slope or less
Permitted on low end of P3Joist only
NOTE Additional connection may be required for wind uplift�
NOTES Additional connection may be required for wind uplift�
Outside corner of blocking panel may be trimmed if it interferes with
roofsheathing� In such cases position the blocking panel on top plate
inorder to minimize trimming and still allow required nailing into top plate�
2'-0" max
Top mounted hanger per
manufacturer’s recommendations
Backer block on both sides of web (or backer block and
filler block, if multiple P3 Joist), nail with 12 - 3” nails,
clinch when possible
Blocking P3 Joist or panel or x-bridging
(Validate use of x-bridging with local building code�
See 7u and 7v for vent holes�)
Face-mount hanger per hanger
manufacturer’s recommendations�
One 10d box nail, face nail at each side of bearing
(face nail where flange is 7/8” to 1” thick)
BACKER BLOCK If top-mounted hanger is fully
supported by top flange, backer block is required only
on hangerside� If face nailing is required, then second
backer block (filler block if multiple P3 Joist) is required�
Use 12 - 10d nails for flanges wider than 2-1/2”�
Filler blocking per Figure 2p
Filler blocking per Figure 2p
1/8” gap at top
Bearing stiffeners
Attach blocking per 7a�
Bearing stiffeners required
when hanger does NOT
support P3 Joist topflange
Header may be P3 Joist,
LVL, glulam, or lumber�
Bearing stiffeners are required on each
side of P3 Joist� Bevel-cut bearing
stiffener to match roof slope�
Bearing stiffener is required
on each side� Attach per 7h
Bearing stiffeners required
when hanger does not
support P3 Joist top flange
4 - 8d nails (two each side)
clinched when possible
Birdsmouth cut shall bear fully and
not overhang the inside face of plate
Attach joist to top
plate per 7h�
Birdsmouth cut at bearing