Installation Instructions

P. 7
FIGURE 2
(
CONTINUED
)
Typical P3 Floor Joist 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.
2g BLOCKING PANEL AT INTERIOR SUPPORT DETAIL
Load bearing wall above shall align vertically with the wall below.
Other conditions such as offset walls are not covered by this detail.
Blocking required over all interior supports under load-bearing walls or
when floor joists are not continuous over support. In high seismic areas
(SDC D0, D1 and D2) the IRC requires blocking at all intermediate supports.
The IBC requires blocking at all supports for all Seismic DesignCategories.
8d nails at 6” o.c.
to top plate
P3 Joist
attachment
per detail 2b
P3 Joist blocking panel per 2a
2e
2f
LOAD TRANSFER WITH PASS THRU BLOCKING DETAIL
Transfer load from above to bearing below. Install squash blocks per 2d.
Match bearing area of blocks below to post above.
PARALLEL END P3 JOIST DETAIL
Wall sheathing,
as required
Use single P3 Joist for loads up to 2000 plf and double P3 Joist for loads up
to 4000 plf (filler block not required). Attach P3 Joist to top plate using
8d nails at 6” o.c.
Provide backer for siding attachment unless nailable sheathing is used.
APA Rim Board may be used in lieu of P3 Joist. Backer is not required
when APA Rim Board is used.
2h P3 JOIST WITH BACKER BLOCKS FOR HANGER DETAIL
Flange
Width
Material Thickness
Required*
Minimum
Depth**
2-1/2” 1” 5-1/2”
3-1/2” 1-1/2” 7-1/4”
* Minimum grade for backer block material shall be Utility
grade SPF (south) or better for solid sawn lumber and shall be
Rated Sheathing grade for wood structural panels.
** For face-mount hangers, use net joist depth minus 3-1/4”
for joists with 1-1/2” thick flanges.
BACKER BLOCK Use if hanger load exceeds 250 lbs.
Before installing a backer block to a double P3 Joist,
drive 3 additional 10d nails through the webs and filler block
where the backer block will fit. Clinch. Install backer tightly
to top flange. Use twelve 10d nails, clinched when possible.
Maximum capacity for hanger for this detail is 1280 lbs.
BACKER BLOCKS Blocks must be long enough to permit
required nailing without splitting.
For hanger capacity see hanger manufacturer’s
recommendations. Verify double P3 Joist capacity
tosupport concentrated loads.
Double P3 Joist header
NOTE Unless
hanger sides
laterally support
the top flange,
bearing stiffeners
shall be used.
Filler block
per Figure 2p
Backer block required
(both sides for face-mounted hangers)
Top- or
face-mounted
hanger