![]() Properly sized cut washers shall be permitted for anchor bolts in wall lines not containing braced wall panels. Plate washers conforming to Section R602.11.1 shall be provided for all anchor bolts over the full length of required braced wall lines.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. Cold-formed steel framing systems shall be fastened to the wood sill plates or anchored directly to the foundation as required in Section R505.3.1 or R603.1.1. Sills and sole plates shall be protected against decay and termites where required by Sections R319 and R320. A nut and washer shall be tightened on each bolt of the plate. Interior bearing wall sole plates on monolithic slab foundation shall be positively anchored with approved fasteners. Bolts shall be at least 1/ 2 inch (13 mm) in diameter and shall extend a minimum of 7 inches (178 mm) into masonry or concrete. In Seismic Design Categories D 0, D 1 and D 2, anchor bolts shall be spaced at 6 feet (1829 mm) on center and located within 12 inches (305 mm) of the ends of each plate section at interior braced wall lines when required by Section R602.10.9 to be supported on a continuous foundation. 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. The wood sole plate at exterior walls on monolithic slabs and wood sill plate shall be anchored to the foundation with anchor bolts spaced a maximum of 6 feet (1829 mm) on center. For garage floors with a steel troweled finish, reduction of the total air content (percent by volume of concrete) to not less than 3 percent is permitted if the specified compressive strength of the concrete is increased to not less than 4,000 psi.See Section R402.2 for maximum cementitious materials content.Total air content (percent by volume of concrete) shall be not less than 5 percent or more than 7 percent. Concrete in these locations that may be subject to freezing and thawing during construction shall be air-entrained concrete in accordance with Footnote d.See Table R301.2(1) for weathering potential.Porches, carport slabs and steps exposed to the weather, and garage floor slabsįor SI: 1 pound per square inch = 6.895 kPa. MINIMUM SPECIFIED COMPRESSIVE STRENGTH a ( f' c)īasement walls, foundations and other concrete not exposed to the weatherīasement slabs and interior slabs on grade, except garage floor slabsīasement walls, foundation walls, exterior walls and other vertical concrete work exposed to the weather MINIMUM SPECIFIED COMPRESSIVE STRENGTH OF CONCRETE TYPE OR LOCATION OF CONCRETE CONSTRUCTION Materials used to produce concrete and testing thereof shall comply with the applicable standards listed in Chapter 3 of ACI 318. ![]() The maximum weight of fly ash, other pozzolans, silica fume, slag or blended cements that is included in concrete mixtures for garage floor slabs and for exterior porches, carport slabs and steps that will be exposed to deicing chemicals shall not exceed the percentages of the total weight of cementitious materials specified in Section 4.2.3 of ACI 318. Concrete subject to moderate or severe weathering as indicated in Table R301.2(1) shall be air entrained as specified in Table R402.2. Concrete shall have a minimum specified compressive strength of ƒ´ c, as shown in Table R402.2.
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