Installation Instructions

P. 5
Floor Framing and Construction Details
FIGURE 2
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.
Installing P3 Joist
1. Before laying out floor system components, verify that P3 Joist
flange widths match hanger widths. If not, contact your supplier.
2. Except for cutting to length, never cut, drill, or notch P3 Joist flanges.
3. Install P3 Joists so that top and bottom flanges are within 1/2” of
true vertical alignment.
4. P3 Joists must be anchored securely to supports before floor sheath
-
ing is attached, and supports for multiple-span joists must be level.
5. Minimum bearing lengths are 1-3/4” for end bearings and 3-1/2” for
intermediate bearings.
6. When using hangers, seat P3 Joist firmly in hanger bottoms to min
-
imize settlement.
7. Leave a 1/16” gap between the P3 Joist end and a header.
8. Concentrated loads greater than those that can normally be expec ted
in residential construction should be applied only to the top surface
of the top flange. Normal concentrated loads include track lighting
fixtures, audio equipment, and security cameras. Never suspend
unusual or heavy loads from the P3 Joists bottom flange. Whenever
possible, suspend all concentrated loads from the top of the P3Joist,
or attach the load to blocking that has been securely fastened to the
P3 Joist webs.
9. Never install P3 Joists where they will be permanently exposed to
weather or where they will remain in direct contact with concrete
or masonry.
10. Restrain ends of floor joists to prevent rollover. Use Certified Rim
Board, rim joists, or P3 Joist blocking panels.
11. For P3 Joists installed over and beneath bearing walls, use full depth
blocking panels, Certified Rim Board, or squash blocks (cripple
members) to transfer gravity loads through the floor system to the
wall or foundation below.
12. Due to shrinkage, common framing lumber set on edge may never
be used as blocking or rim boards. P3 Joist blocking panels or other
engineered wood products such as Certified Rim Board must be cut
to fit between the P3 Joists, and a P3 Joist-compatible depth must
be selected.
13. Provide permanent lateral support of the bottom flange of all
P3 Joists at interior supports of multiple-span joists. Similarly,
support the bottom flange of all cantilevered P3 Joists at the end
support next to the cantilever extension. In the completed structure,
the gypsum wallboard ceiling provides this lateral support. Until the
final finished ceiling is applied, temporary bracing or struts must
beused.
14. If square-edge panels are used, edges must be supported between
P3Joists with 2 x 4 blocking. Glue panels to blocking to minimize
squeaks. Blocking is not required under structural finish flooring such
as wood strip flooring or if a separate underlayment layer is installed.
15. Nail spacing
Space the nails installed to the flange’s top face in accor dance with
the applicable building code requirements or approved building plans.
Glulam or Structural Composite
Lumber (SCL) headers
2g
2d, 2e
2b, 2c
2j
2p
2a, 2n
Figures 3, 4, 5a & 5b
Holes may be cut in web for
plumbing, wiring, and duct work.
See Table 4 and Figure 6.
NOTE Never cut or notch flanges.
Glulam or SCL headers
2f
Use hangers recognized
in current ICC-ES reports.
2h, 2j, 2k, 2m
Figures 3, 4, 5a & 5b