Installation Instructions

P. 10
Cantilever Details for Interior Balconies (No Wall Load)
FIGURE 3
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.
Balconies may be constructed by using either continuous P3 Joists (Figure 3) or by adding lumber extensions
(Figure 4) tothe P3 Joist. Continuous P3 Joist cantilevers are limited to one-fourth the adjacent span when
supporting uniform loads only. For applications supporting concentrated loads at the end of the cantilever such
as a wall, see Figures5a and 5b.
Unless otherwise engineered, cantilevers are limited to a maximum of 4’ when supporting uniform loads only.
Blocking is required at the cantilever support as shown.
Uniform floor load shall not exceed 40 psf live load and 10 psf dead load. The balcony load shall not exceed 60psf
live load and 10 psf dead load.
Lumber Cantilever Details For Balconies (No Wall Load)
FIGURE 4
1-1/2 x L
4’ minimum
L
4’ maximum,
where
L is length
of
cantileve
r
Attach P3 Joists to plate at all
supports per Detail 2b.
Full depth backer block with 1/8” gap between block and top flange of P3 Joist
See Detail 1h. Nail with 2 rows of 10d nails @ 6” o.c. and clinch.
Cantilever extension supporting
uniform floor loads only
2 x 8 min. Nail to backer block and joist with 2 rows of 10d
nails @ 6” o.c. and clinch (Cantilever nails may be used to attach
backer block if length of nail is sufficient to allow clinching).
P3 Joist or APA Rim Board
3-1/2” min. bearing required
Lumber or wood structural panel closure
L/4
4’ maximum,
where
L is
joist span
Attach P3 Joists to plate at all
supports per Detail 2b.
Cantilever extension
supporting uniform floor
loads only
APA Rim Board or
wood structural panel
3-1/2” min. bearing required
CAUTION
Cantilevers formed this way
must be carefully detailed to
prevent moisture intrusion
into the structure and
potential decay of untreated
P3 Joist extensions.