The 2021 edition of the International Residential Code for One and Two-Family Dwellings is amended in the following respects.
(1) Section R101.1 is hereby revised to include, “City of Galesburg” in place of, “[Name of Jurisdiction].
(2) Section R105.2 Building of the residential code is hereby amended by deleting items 1 and 2 and renumbering remaining items.
(3) Section R301.2 of the residential code is hereby amended by completing Table R301.2 as follows:
Ground Snow Load—20 pounds per square foot
Wind Design Speed (mph)—107 miles per hour
Wind Design Topographic Effects - No.
Seismic Design Category—Zone A
Subject to Damage From:
Weathering—Severe
Frost line depth—36 inches
Termite—Yes, moderate to heavy
Winter Design Temp—Minus 4
Ice Barrier Underlayment Required—Yes
Flood Hazards—Flood insurance rate map (FIRM) and flood boundary floodway map (FBFM), effective date June 19, 1985
Air Freezing Index—1500
Mean Annual Temp—50 degrees Fahrenheit
(4) Section R302.1 of the residential code is hereby amended, so that as amended, the first sentence of the third Exception shall read as follows:
Tool and storage sheds, playhouses and similar structures that are less than 150 square feet are not required to provide wall protection based on the location on the lot.
(4.1) The fourth Exception contained in Section R302.1 of the residential code is amended to read as follows:
Detached garages accessory to a dwelling shall be permitted to be located 3 feet from the property line with a 0 hour fire-resistance rating. Any portion of an accessory garage located less than 3 feet from the property line shall have a 1-hour fire-resistance rating. Detached garages accessory to a dwelling located within 2 feet of a lot line are permitted to have roof eave projections not exceeding 4 inches.
(4.2) Section R302.1 of the residential code is amended by adding thereto the following exception:
6. All detached accessory structures must have a 4-foot minimum separation between the exterior walls.
(5) Section R403 of the residential code is hereby amended by adding the following provisions regarding Figure R403.1(1):
a. For masonry foundation walls, the footings shall be a minimum of sixteen (16) inches wide and eight (8) inches deep;
b. Poured concrete trenches shall be a minimum of eight (8) inches wide for single story accessory structures utilizing frost footings; and shall meet the bearing width as required in Table R403.1 for 1 story, 2 story and 3 story dwellings and accessory structures with over 1 story;
c. When an addition is being constructed to a structure with a footing depth of less than thirty-six (36) inches, the new addition must still comply with the thirty-six (36) inch frost footing requirements.
(6) The residential code is hereby amended by adding thereto the following section:
Sec. R409 Utility Sheds.
Permanent foundations are not required for utility sheds of one hundred fifty (150) square feet or less with a height of eight (8) feet or less. Utility sheds with no permanent foundation, however, must have a floor of one of the following:
Pressure-treated wood, metal, concrete, asphalt, brick, rock or gravel. Such utility sheds must also be properly anchored in one of the following manners:
Bolting into concrete, screw anchors at each corner of the shed, or an approved equal. Skids shall be permitted to remain under a utility shed.
(7) The residential code is hereby amended by adding thereto the following section:
Sec. R506.2.5 Floating Concrete Slabs.
A floating concrete slab may be utilized in one-story accessory buildings, provided:
a. The slab covers an area of one thousand (1,000) square feet or less;
b. A lug eight (8) inches in width is constructed around the perimeter of the slab which extends at least eight (8) inches below the top of said slab;
c. The slab and lug consists of a continuous pour of concrete;
d. No water or sewer lines serve the building;
e. The building is securely anchored to the slab through an approved fashion; and
f. A pressure-treated bottom plate is used on all concrete slab installations, including those utilizing a curb.
(8) The residential code is hereby amended by adding thereto the following section:
Sec. R506.2.6. Existing Floating Slabs.
An existing floating slab may be utilized in the construction of a new accessory building, provided the existing slab meets the approval of the building official. In the event a new section of concrete is to be added on to an existing floating slab, the following requirements shall be met:
a. The existing slab must meet the approval of the building official;
b. The new section of concrete shall be tied to the existing slab by one-half (1/2) inch reinforcement bars placed eighteen (18) inches on center and run six (6) inches into the existing slab and eighteen (18) inches into the area to be poured; and
c. All of the requirements under section R506.2.5 except item c., shall be followed.
(9) The residential code is hereby amended by deleting therefrom, Section 908.3.1.1(2) and Section R908.4 Roof recovering.
(10) Section R1001.11 of the residential code is hereby amended by adding thereto the following:
Exceptions: (5) Steel studs with zero (0) inch clearance may be utilized in lieu of wood or combustible framing with the two (2) inch clearance.
(11) Section R1006.1 of the residential code is hereby amended, so that as amended, it shall read as follows:
Factory-built or masonry fireplaces covered in this chapter may be equipped with an exterior air supply to assure proper fuel combustion unless the room is mechanically ventilated and controlled so that the indoor pressure is neutral or positive.
(12) The residential code is hereby amended by deleting therefrom Part IV Energy Conservation, which includes chapter 11.
(13) Reserved.
(14) Reserved.
(15) Section M1601.1.2 of the residential code is hereby amended by deleting “or shall be completely encased in concrete not less than 2 inches (51 mm) thick” from the sixth and seventh lines.
(16) Section M1601.4.1 of the residential code is hereby amended, so that as amended, the last sentence shall read as follows:
Crimp joints for round ducts shall have a contact lap of at least one and one-half (1-1/2) inches and shall be mechanically fastened by means of at least two (2) sheet metal screws, or rivets equally spaced around the joint, or an equivalent fastening method.
(17) Section M1602.2(4) of the residential code is hereby amended, so that as amended, it shall read as follows:
(4) A closet, bathroom, toilet room, garage, mechanical room, furnace room, or other dwelling unit.
(18) Reserved.
(19) Section M2005.1 of the residential code is hereby amended, so that as amended, the first sentence shall read as follows:
Water heaters shall be labeled and shall be installed in accordance with the manufacturer’s installation instructions and the Illinois State Plumbing Code.
(20) Section M2101.1 of the residential code is hereby amended by revising Table M2101.1 to include a footnote 6 to read as follows:
Type M copper tubing shall only be used above ground.
(21) Section M2101.3 of the residential code is hereby amended, so that as amended, it shall read as follows:
The potable water system shall be protected from backflow in accordance with the most current Illinois State Plumbing Code.
(22) The residential code is hereby amended by deleting therefrom, Section M2101.4.
(23) The residential code is hereby amended by deleting therefrom, Section M2101.7.
(24) Section G2414 of the residential code is hereby amended by deleting Section G2414.4.3 Copper Tubing to eliminate copper tubing and copper pipe from use as allowed, natural gas supply piping materials, interior and exterior.
(25) Section G2448.1 of the residential code is hereby amended, so that as amended, it shall read as follows:
Water heaters shall be tested in accordance with ANSI Z21.10.1 and ANSI Z21.10.3 and Water heaters shall be labeled and shall be installed in accordance with the manufacturer’s installation instructions and the Illinois State Plumbing Code.
(26) The residential code is hereby amended by deleting therefrom Part VII, Plumbing which includes chapters 25, 26, 27, 28, 29, 30, 31, 32, and 33.
(27) Section AI101.1 in Appendix AI of the residential code is hereby amended, so that as amended, it shall read as follows:
AI101.1 Scope. Private sewage disposal systems shall conform to the current edition of the State of Illinois Private Sewage Disposal licensing Act and Code, as published by the Illinois Department of Public Health and the Knox County Health Ordinance Article IV Private Sewage Disposal.
(28) Reserved.
(29) The residential code is hereby amended by adding thereto the following subsection:
R405.2.4. A sump pit, a minimum of 18 inches in diameter by 22 inches deep shall be installed in all new construction crawl spaces that are not attached to a basement.
(30) The residential code is hereby amended by deleting therefrom Section R313.
(1990 Code, § 6-29) (Ord. 67-902, passed 6-5-1967; Ord. 78-565, passed 1-16-1978; Ord. 82-849, passed 3-15-1982; Ord. 92-1476, passed 11-16-1992; Ord. 01-2013, passed 4-16-2001; Ord. 01-2031, passed 9-17-2001; Ord. 04-3048, passed 5-17-2004; Ord. 09-3243, passed 3-2-2009; Ord. 14-3458, passed 9-15-2014; Ord. 23-3717, passed 11-20-2023)