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Spacing of PDP and PHN Fasteners
for Attachment of Wood Sill Plates to Normal Weight Concrete
- Spacings are based upon the attachment of 2-inch (nominal thickness) wood sill plates, with specific gravity of 0.50 or greater, to concrete floor slabs or footings. For species of wood with specific gravity of 0.42 to 0.49, multiply required spacing of fasteners for shear walls by 0.81. For species of wood with specific gravity of 0.31 to 0.41, multiply the required spacing of fasteners for shear walls by 0.65.
- All walls shall have fasteners placed at 6 inches from ends of sill plates, with maximum spacing as shown in the table.
- Fasteners indicated shall have two pins placed 6 inches and 10 inches, respectively, from each end of sill plates, with maximum spacing as shown in the table.
- All fasteners must be installed with a minimum ³⁄₄-inch-diameter, No. 16 gauge (0.0598 inch) steel washer.
- Fasteners shall not be driven until the concrete has reached a compressive strength of 2,000 psi. Minimum edge distance is 1 3/4 inches.
- The fasteners shall not be used for the attachment of shear walls having a unit shear in excess of 100 pounds per foot. Spacings shown are independent of the number of building stories..
