Chapter 05C Existing Building Code

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E XISTING B UILDING C ODE §5C-2-1 When wood-frame dwellings are supported by posts, 2-inch by 4-inch (51 mm by 102 mm) foundation bracing must be provided. For one-story conventional residential structures, the local practice of using foundation blocks with termite shields is acceptable in all areas except in flood hazard areas and for developments adjacent to drainage facilities as specified in chapter 27, Hawai‘i County Code. 405.2.1.3 Boards for single-wall construction. 405.2.1.3.1 One and one-eighth inch boards. Single-wall construction with boards of 1-1/8 inch (28.6 mm) net thickness are not required to have girts. 405.2.1.3.2 One-inch boards. Where single-wall construction is with boards of one-inch thickness (25.4 mm), no girt is required, provided approved stiffeners for any section of such wall are spaced not more than 10 feet (3048 mm) along the wall. 405.2.1.3.3 Three-fourths-inch boards. Single-wall construction with boards of 3/4-inch (19.1 mm) net thickness must have girts and cross partitions at least every 30 feet (9144 mm). 405.2.1.3.4 Approved stiffeners. Approved stiffeners must be studs at least 2-inches by 4-inches (51 mm by 102 mm), full height window or door jambs, posts, walls or partitions at right angles to the section of wall under construction. 405.2.1.3.5 Girts. Girts for single-wall construction must be not less than 2-inches by 6-inches (51 mm by 152 mm) belt course or other approved strengthening about mid height between the floor and ceiling on all exterior walls. 405.2.1.3.6 Complete load path. Blocking, bridging, straps, approved framing anchors or mechanical fasteners must be designed and installed to provide continuous ties from the roof to the foundation system. Sheet metal clamps, ties or clips, must be formed of ASTM A153 G90 galvanized steel or other approved corrosion-resistant material of not less than 0.040-inch (1.01 mm) nominal thickness. Uplift resistance must be in accordance with Table R802.11.” SUPP. 11 (1-2022) 5C-7