A proprietary manufacturing process produces properties that allow designs with excellent seismic and wind-resistance performance. Our proven edge- and end-coating process for moisture resistance virtually ensures dimensional stability and job site durability.
Sizes and Weights
Depth 9-1/2" 11-7/8" 14" 16"
Weight (PLF) 3.0 3.7 4.4 5.0
Vertical Load - Rim doublerstarter joist, or starter joist with blocking, supports 24" o.c., 4,850 PLF
Horizontal Load - Lateral seismic or wind load, 200 PLF using a load duration factor of 160%. With 1/2" lag or through bolt attaching ledger to rim board, 350 lbs. lateral load per bolt
Lateral load for nails in wide face of rim board - Design per 1997 NDS using Douglas Fir-Larch values
Connecting to joist - Face-nail rim board to each joist with two (2) 8d nails, one into top and bottom flange.
Connecting to plate - Toe-nail rim board to wall plate with 8d nails at 6" o.c. or 16d nails at 12" o.c.
Connecting to subfloor - Attach floor sheathing to rim board per building code or structural panel manufacturer's specifications (closest on-center nail spacing is 6"). For lateral seismic or wind shear transfer of up to 200 PLF, use 8d nails at 6" o.c.
Connecting to other rim boards - Face-nail rim boards together at corners with three (3) 8d nails.
Attaching ledgers - To attach a ledger, use 1/2" through bolts with nuts and washers or 1/2" lag screws (minimum length of 4") with washers. Maintain 2" edge distances on ledger and rim board. When using lag screws, drill 5/16" lead holes in rim board and 1/2" holes in ledger. Caulk holes with high quality caulking immediately before inserting the bolts or lag screws. Caution: The lag screw should be inserted in a lead hole by turning with a wrench, not by driving with a hammer. Do not over-torque lag screws. Over-torquing can significantly reduce the lateral resistance of the lag screw.
For installation and technical information, refer to the FiberStrong Rim Board sections of Residential Floor and Roof Systems Product Guide (PDF: 2MB/56pgs) .
FiberStrong Rim Board has been tested and approved as a rim board and starter joist by APA-EWS. FiberStrong Rim Board is not recommended as a structural joist, rafter, header or ledger. For such applications, consider Wood I Beam joists or GP Lam LVL .