Recommended Allowable Design Shear for Lumber-Framed Walls.

1.   * = Framing at panel edges shall be 3 inches nominal or thicker.

2.   Values shown are for studs of species/grade combination   b -1 and  b -2  SYP.

3.   Design shear for 3/8" plywood used in crawl space construction and fastened with 8d nails      shall be the same as those shown for 15/32" plywood when studs are spaced 16" o.c. or less.
Nails are for hot dip zinc coated steel or stainless steel Type 304 or 316. 8d- 2 1/2" x 113 (head 0.281")  10d- 3" x .128 (head 0.312"). Common or box nails can be used.
Nails Spacing at 12" o.c. along intermediate framing members (Studs).

Block all top plywood seams in all 9 ft. and 10 ft. walls. Use 2x4 blocking and nail plywood to blocking as required.

Note: Panel foundations can be site built or made in a shop. When made so it cover up items that need inspection by the Building Inspector. Third Party Inspection may be required. (inspect for grade stamps, treatment stamps, stud spacing, insulation, nailing, dip of saw cuts, plywood requirments are some of the item that a third party inspection will note.

All Panel Wood Foundations must be designed and installed in accordance with:
All current Building Codes Standards

While wood foundations are easy to build, this is only true if one is building from an accurate well designed plan. When such a plan is incorrect, or if something is left out of the plan or absent, or if a design is made using a guide manual (these are not design manuals); major mistakes can be made during the construction process. These errors cause problems for the owner, builder, and the building department.

Woodbasement.com a service of Permanent Wood Foundation System (PWF), supported by Southern Pine lumber users affiliated with the training and installation of wood foundations.
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