Indiana Administrative Code
Title 675 - FIRE PREVENTION AND BUILDING SAFETY COMMISSION
Article 14 - ONE AND TWO FAMILY DWELLING CODE
Rule 4.4 - 2020 Indiana Residential Code
Section 4.4-44 - Section R403.1.6; foundation anchorage
Current through March 20, 2024
Authority: IC 22-13-2-2; IC 22-13-2-2.5; IC 22-13-2-13
Affected: IC 22-12; IC 22-13; IC 22-14; IC 22-15; IC 36-7
Sec. 44.
Delete SECTION R403.1.6 and substitute to read as follows: SECTION R403.1.6 FOUNDATION ANCHORAGE.
Wood sole plates and sill plates supported directly on concrete slab, and concrete and masonry walls, shall be anchored to the foundation in accordance with this section. Sill plates and sole plates shall be protected against decay and termites where required by Sections R317 and R318. Cold-formed steel framing shall be anchored directly to the foundation or fastened to wood sill plates anchored to the foundation in accordance with Section R505.3.1 or R603.3.1, as applicable. Wood sill plates supporting cold-formed steel framing shall be anchored to the foundation in accordance with this section.
SECTION R403.1.6.1 ANCHOR BOLTS.
Anchor bolts shall be located in the center one-third of the plate, shall have at least seven (7) inches (178 mm) embedment into concrete or grouted masonry cells, and shall have at least one and one half (1 1/2) inches (38.7 mm) of concrete or grout surrounding the bolt shaft. Each anchor bolt shall have a washer, sized to be at least two times the diameter of the hole it covers, and a nut tightened to the plate. Except as allowed otherwise in this section anchor bolts shall be no farther than twelve (12) inches (305 mm) from corners.
EXCEPTION: Approved anchors or anchor straps spaced as required to provide equivalent anchorage to 1/2 inch diameter (12.7 mm) anchor bolts.
SECTION R403.1.6.2 SOLE PLATE ANCHOR BOLT LOCATION.
Anchor bolts spaced a maximum of six (6) feet (1,829 mm) on center shall fasten wood sole plates of exterior walls and braced wall panels at building interiors, when installed directly on concrete slab foundations. There shall be no fewer than two bolts per plate section with one bolt located not more than twelve (12) inches (305 mm) or less than seven bolt diameters from each end of the plate section.
EXCEPTIONS:
1. Sole plates twenty-four (24) inches (610 mm) total length or shorter supporting offset braced wall panels shall be anchored to the foundation with no fewer than one anchor bolt located in the center third of the plate section and shall be attached to adjacent braced wall panels at corners as shown in item 9 of Table R602.3(1).
2. Connection of walls twelve (12) inches (305 mm) total length or shorter connecting offset braced wall panels to the foundation without anchor bolts shall be permitted. The wall shall be attached to adjacent braced wall panels at corners as shown in item 9 of Table R602.3(1).
3.Sole plates of interior bearing wall panel sections on concrete slab foundation that are not part of a braced wall panel shall be positively anchored with approved fasteners.
SECTION R403.1.6.3 SILL PLATE ANCHOR BOLT LOCATION.
Anchor bolts shall fasten sill plates to concrete floors a maximum of 6 feet (1,829 mm) on center. Anchor bolts shall fasten sill plates to the top of concrete or masonry walls a maximum of 4 feet (1,219 mm) on center.
EXCEPTION: Sill plate anchor bolts shall be spaced a maximum of 6 feet (1,829 mm) on center when installed on foundation walls retaining less than 7 feet (2,135 mm) of unbalanced fill. SECTION R403.1.6.4 FOUNDATION ANCHORAGE IN SEISMIC DESIGN CATEGORIES C, D0, D1, and D2. In addition to the requirements of Section R403.1.6, the following requirements shall apply to wood light-frame structures in Seismic Design Categories D0, D1, and D2 and wood light-frame townhouses in Seismic Design Category C.
1. Plate washers conforming to Section R602.11.1 shall be provided for all anchor bolts over the full length of required braced wall lines except where approved anchor straps are used. Properly sized cut washers shall be permitted for anchor bolts in wall lines not containing braced wall panels.
2. Interior braced wall plates shall have anchor bolts spaced at not more than 6 feet (1,829 mm) on center and located within 12 inches (305 mm) of the ends of each plate section where supported on a continuous foundation.
3.Interior bearing wall sole plates shall have anchor bolts spaced at not more than 6 feet (1,829 mm) on center and located within 12 inches (305 mm) of the ends of each plate section where supported on a continuous foundation.
4. The maximum anchor bolt spacing shall be 4 feet (1,219 mm) for buildings over two stories in height.
5. Stepped cripple walls shall conform to Section R602.11.2.
6. Where continuous wood foundations in accordance with Section R404.2 are used, the force transfer shall have a capacity equal to or greater than the connections required by Section R602.11.1, or the braced wall panel shall be connected to the wood foundations in accordance with the braced wall panel-to-floor fastening requirements of Table R602.3(1).
