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// CODE SNIPPET

2308.3 Foundations and Footings

Building Code 2018 of Illinois > 23 Wood > 2308 Conventional Light-Frame Construction > 2308.3 Foundations and Footings
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Foundations and footings shall be designed and constructed in accordance with Chapter 18. Connections to foundations and footings shall comply with this section.

2308.3.1 Foundation Plates or Sills

ILLUSTRATION
Foundation plates or sills resting on concrete or masonry foundations shall comply with Section 2304.3.1. Foundation plates or sills shall be bolted or anchored to the foundation with not less than 1/2-inch-diameter (12.7 mm) steel bolts or approved anchors spaced to provide equivalent anchorage as the steel bolts. Bolts shall be embedded not less than 7 inches (178 mm) into concrete or masonry. The bolts shall be located in the middle third of the width of the plate. Bolts shall be spaced not more than 6 feet (1829 mm) on center and there shall be not less than two bolts or anchor straps per piece with one bolt or anchor strap located not more than 12 inches (305 mm) or less than 4 inches (102 mm) from each end of each piece. Bolts in sill plates of braced wall lines in structures over two stories above grade shall be spaced not more than 4 feet (1219 mm) on center. A properly sized nut and washer shall be tightened on each bolt to the plate.

2308.3.1.1 Braced Wall Line Sill Plate Anchorage in Seismic Design Category D

ILLUSTRATION
Sill plates along braced wall lines in buildings assigned to Seismic Design Category D shall be anchored with not less than 1/2-inch (12.7 mm) diameter anchor bolts with steel plate washers between the foundation sill plate and the nut, or approved anchor straps load-rated in accordance with Section 2304.10.3 and spaced to provide equivalent anchorage. Plate washers shall be not less than 0.229 inch by 3 inches by 3 inches (5.82 mm by 76 mm by 76 mm) in size. The hole in the plate washer is permitted to be diagonally slotted with a width of up to 3/16 inch (4.76 mm) larger than the bolt diameter and a slot length not to exceed 13/4 inches (44 mm), provided that a standard cut washer is placed between the plate washer and the nut.

2308.3.1.2 Braced Wall Line Sill Plate Anchorage in Seismic Design Category E

ILLUSTRATION
Sill plates along braced wall lines in buildings assigned to Seismic Design Category E shall be anchored with not less than 5/8-inch diameter (15.9 mm) anchor bolts with steel plate washers between the foundation sill plate and the nut, or approved anchor straps load-rated in accordance with Section 2304.10.3 and spaced to provide equivalent anchorage. Plate washers shall be not less than 0.229 inch by 3 inches by 3 inches (5.82 mm by 76 mm by 76 mm) in size. The hole in the plate washer is permitted to be diagonally slotted with a width of up to 3/16 inch (4.76 mm) larger than the bolt diameter and a slot length not to exceed 13/4 inches (44 mm), provided that a standard cut washer is placed between the plate washer and the nut.

Related Code Sections


2308.3 Wood, Foundations and Footings
Foundations and footings shall be designed and constructed in accordance with Chapter 18. Connections to foundations and footings shall comply ...
Building Code 2021 of Illinois > 23 Wood > 2308 Conventional Light-Frame Construction > 2308.3 Foundations and Footings
2308.3 Wood, Foundations and Footings
Foundations and footings shall be designed and constructed in accordance with Chapter 18. Connections to foundations and footings shall comply ...
Building Code 2018 of Illinois > 23 Wood > 2308 Conventional Light-Frame Construction > 2308.3 Foundations and Footings
2308.3.1.2 Wood, Braced Wall Line Sill Plate Anchorage in Seismic Design Category E
(15.9 mm) anchor bolts with steel plate washers between the foundation sill plate and the nut, or approved anchor straps load-rated in accordance ...
Building Code 2018 of Illinois > 23 Wood > 2308 Conventional Light-Frame Construction > 2308.3 Foundations and Footings > 2308.3.1 Foundation Plates or Sills > 2308.3.1.2 Braced Wall Line Sill Plate Anchorage in Seismic Design Category E
2111.3 Masonry, Footings and Foundations
and shall extend not less than 6 inches (153 mm) beyond the face of the fireplace or foundation wall on all sides. Footings shall be founded on natural ...
Building Code 2021 of Illinois > 21 Masonry > 2111 Masonry Fireplaces > 2111.3 Footings and Foundations
2111.3 Masonry, Footings and Foundations
extend not less than 6 inches (153 mm) beyond the face of the fireplace or foundation wall on all sides. Footings shall be founded on natural ...
Building Code 2018 of Illinois > 21 Masonry > 2111 Masonry Fireplaces > 2111.3 Footings and Foundations
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