Oklahoma Administrative Code › Title 748 - Oklahoma Uniform Building Code Commission › Chapter 20 - Adopted Codes › Subchapter 6 - IRC[®] 2018 › Section 748:20-6-9 - IRC[®] 2018 Chapter 4 Foundations

Current through Vol. 41, No. 20, July 1, 2024
Chapter 4 of the IRC® 2018 is adopted with the following
				  modifications:
(1) Section R402.2
				Concrete. This section has been modified to include an exception for interior
				concrete slabs on grade and enclosed garage slabs to the requirement the
				concrete be air entrained. This section has been modified to read: R402.2
				Concrete. Concrete shall have a minimum specified compressive strength of f 'c,
				as shown in Table R402.2. Concrete subject to moderate or severe weathering as
				indicated in Table R301.2(1) shall be air entrained as specified in Table
				R402.2. 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 the
				cementitious materials specified in Section 19.3.3.4 of ACI 318. Materials used
				to produce concrete testing thereof shall comply with the applicable standards
				listed in Chapters 19 and 20 of ACI 318 or ACI 332. Exception: Interior
				concrete slabs on grade and enclosed garage slabs are not required to be
				air-entrained.
(2) Table R403.1(1)
				Minimum width and thickness for concrete footings for light-frame construction
				(inches) with a superscript "a" and "b" to indicate footnotes "a" and "b" are
				applicable. This table has been modified to strike footnote "b" from the table
				title and from underneath the table. No other modifications were made to the
				table. The table title has been modified to read: Table R403.1(1) Minimum width
				and thickness for concrete footings for light-frame construction (inches) with
				a superscript "a" to indicate footnote "a" applies. The footnote at the bottom
				of the table has been amended to read: "a. Interpolation allowed. Extrapolation
				is not allowed."
(3) Table
				R403.1(2) Minimum width and thickness for concrete footings for light-frame
				construction with brick veneer (inches) with a superscript "a" and "b" to
				indicate footnotes "a" and "b" are applicable. This table has been modified to
				strike footnote "b" from the title and from underneath the table. No other
				modifications were made to the table. The table title has been modified to
				read: Table R403.1(2) Minimum width and thickness for No other modifications
				were made to the table. concert footings for light-frame construction with
				brick veneer (inches) with a super script "a" to indicate footnote "a" applies.
				The footnote at the bottom of the table has been amended to read: "a.
				Interpolation allowed. Extrapolation is not allowed."
(4) Table R403.1(3) Minimum width and
				thickness for concrete footings with cast-in-place concrete or fully grouted
				masonry wall construction (inches) with a superscript "a" and "b" to indicate
				footnotes "a" and "b" are applicable. This table has been modified to strike
				footnote "b" from the title and from underneath the table. No other
				modifications to the table were made. The table title has been modified to
				read: Table R403.1(3) Minimum width and thickness for concrete footings with
				cast-in-place concrete or fully grouted masonry wall construction (inches) with
				a superscript "a" to indicate footnote "a" applies. The footnote at the bottom
				of the table has been amended to read: "a. Interpolation allowed. Extrapolation
				is not allowed."
(5) Section
				R403.1. General. This section has been modified to provide language specifying
				rebar reinforcement requirements in concrete footings. This section has been
				modified to read: R403.1 General. All exterior walls shall be supported on
				continuous solid or fully grouted masonry or concrete footings, crushed stone
				footings, wood foundations, or other approved structural system that shall be
				of sufficient design to accommodate all loads according to Section R301 and to
				transmit the resulting loads to the soil within the limitations as determined
				by the character of the soil. Footings shall be supported on undisturbed
				natural soils or engineered fill. Concrete footings shall be designed and
				constructed in accordance with the provisions of Section R403 or in accordance
				with ACI 332. Concrete footings shall meet the following requirements:
(A) Item 1. Add 2 number four (4) rebar to
				all footings.
(B) Item 2. All cold
				joints between footings and foundation walls (stem walls) shall be tied
				together by a number four (4) rebar at every corner not to exceed 6 feet (1828
				mm) o.c. with embedment of 12 inches (304 mm) into each footing and
				wall.