1/18/2024 0 Comments Masonry stem wall foundation![]() ![]() In addition to the requirements of Section R403.1.6, the following requirements shall apply to wood light-frame structures in Seismic Design Categories D 0, D 1 and D 2 and wood light-frame townhouses in Seismic Design Category C. R403.1.6.1 Foundation anchorage in Seismic Design Categories C, D 0, D 1 and D 2. The wall shall be attached to adjacent braced wall panels at corners as required in Section R602. Connection of walls 12 inches (305 mm) total length or shorter connecting offset braced wall panels to the foundation without anchor bolts shall be permitted.Walls 24 inches (610 mm) total length or shorter connecting offset braced wall panels shall be anchored to the foundation with a minimum of one anchor bolt located in the center third of the plate section and shall be attached to adjacent braced wall panels at corners as required in Section R602.Foundation anchorage, spaced as required to provide equivalent anchorage to 1/ 2-inch- diameter (12.7 mm) anchor bolts.Cold-formed steel framing systems shall be fastened to wood sill plates or anchored directly to the foundation as required in the standard used for design of building as specified in Section R301.2.1.1. Sill plates and sole plates shall be protected against decay and termites where required by Sections R317 and R318. Interior bearing wall sole plates on monolithic slab foundation that are not part of a braced wall panel shall be positively anchored with approved fasteners. There shall be a minimum of two bolts per plate section with one bolt located not more than 12 inches (305 mm) or less than seven bolt diameters from each end of the plate section. A nut and washer shall be tightened on each anchor bolt. Bolts shall be at least 1/ 2 inch (12.7 mm) in diameter and shall extend a minimum of 7 inches (178 mm) into concrete or grouted cells of concrete masonry units. Wood sole plates at all exterior walls on monolithic slabs, wood sole plates of braced wall panels at building interiors on monolithic slabs and all wood sill plates shall be anchored to the foundation with anchor bolts spaced a maximum of 6 feet (1829 mm) on center. In Seismic Design Categories D 0, D 1 and D 2 masonry stem walls without solid grout and vertical reinforcing are not permitted. The vertical bar shall extend to 3 inches (76 mm) clear of the bottom of the footing and have a standard hook. 4 bar shall be installed at not more than 4 feet (1219 mm) on center. In Seismic Design Categories D 0, D 1 and D 2 where a grouted masonry stem wall is supported on a concrete footing and stem wall, a minimum of one No. The vertical bar shall extend to 3 inches (76 mm) clear of the bottom of the footing, have a standard hook and extend a minimum of 14 inches (357 mm) into the stem wall. In Seismic Design Categories D 0, D 1 and D 2 where a construction joint is created between a concrete footing and a stem wall, a minimum of one No. Bottom reinforcement shall be located a minimum of 3 inches (76 mm) clear from the bottom of the footing. TABLE R401.1-continued FOUNDATION UPLIFT LIGHT STEEL & WOOD FRAME BUILDINGS IN EXPOSURE C (plf) 5, 6 Roof AngleĬoncrete footings located in Seismic Design Categories D 0, D 1 and D 2, as established in Table R301.2(1), shall have minimum reinforcement. V asd as determined in accordance with Section R301.2.1.3 / Velocity Pressure TABLE R401.1 FOUNDATION UPLIFT LIGHT STEEL & WOOD FRAME BUILDINGS IN EXPOSURE B (plf) 5, 6 Roof Angle ![]()
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