The 2006 edition of the International Residential Code, as published by the International Code Council, Inc., including Appendices A, B, C, D, F, G, I, J, K, M, N, O and Q, is adopted by reference to regulate the construction of one-family and two-family (duplex) dwellings only, including their accessory structures, with the following amendments, additions, deletions and modifications:
Section R101.1 is amended to read as follows:
R101.1 Title. These regulations shall be known as the Residential Code of One- and Two-Family dwellings of the Village of Rosemont, Illinois, hereinafter referred to as “this code”.
Section R101.2 is amended to read as follows:
R101.2 Scope. The provisions of the International Residential Code for One- and Two-Family Dwellings shall apply to the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal and demolition of detached one- and two-family dwellings not more than three (3) stories in height with a separate means of egress and their accessory structures.
Section R104.10.1 is deleted in its entirety.
Section R106.1 is amended by adding thereto the following:
R106.1 The construction documents shall be prepared by a registered design professional as required by applicable state law for the following:
1. New house construction.
2. Additions of occupiable or habitable space in excess of 119 sq. ft. in area (except screen rooms).
3. Alterations with a valuation in excess of $30,000.
4. Where deemed appropriate by the code official for unique construction or circumstances.
Exception: The building official is authorized to waive the submission of construction documents and other data not required to be prepared by a registered design professional if it is found that the nature of the work applied for is such that reviewing of construction documents is not necessary to obtain compliance with the code.
Section R109.1.4 is amended by adding the following:
R109.1.4.1 Insulation inspection. After the approved rough framing inspection and prior to the wall and ceiling covering being installed, the insulation installation shall be inspected.
Section R109.5 is added to read as follows:
R109.5 Prefabricated construction. All elements of prefabricated construction are to be readily accessible and visible for inspection on site.
Section R110.1 is amended to read as follows:
R110.1 Use and occupancy. No building or structure shall be furnished, used or occupied, and no change in the existing occupancy classification of a building or structure or portion thereof shall be made until the code official has issued a certificate of occupancy therefore and provided herein. The remainder of section R110.1 shall remain unchanged.
Table R301.2(1) is amended as follows:
1. | Insert “25 pounds per square foo”" below the column titled “Ground Snow Load”. |
2. | Insert “90 miles per hour” below the column titled “Wind Speed”. |
3. | Insert “B” below the column titled “Seismic Design Category”. |
4. | Insert “Severe” below the column titled “Weathering”. |
5. | Insert “42 inches” below the column titled “Frost Line Depth”. |
6. | Insert “Moderate to heavy” below the column titled “Termite”. |
7. | Insert “-4 degrees Fahrenheit” below the column titled “Winter Design Temp”. |
8. | Insert “Yes” below the column titled “Ice Barrier Underlayment Required”. |
9. | Insert “See applicable Village Code” below the column titled “Flood Hazards”. |
10. | Insert “1700" below the column titled “Air Freezing Index”. |
11. | Insert “47 Degrees Fahrenheit” below the column titled “Mean Annual Temperature”. |
Table R301.5 is amended by inserting “40” in the cross section of the column titled “Live Load” and the row entitled “Sleeping Rooms”.
Section R302.1 is amended by deleting the exceptions.
Section R302 is amended by adding thereto the following:
R302.2 Separation from accessory buildings. A detached accessory building shall be separated from the dwelling by a minimum of six (6) feet, eave to eave.
Exception: The separation distance of a detached garage may be reduced to a minimum of three (3) feet provided any point on the interior wall or roof of a detached garage within ten (10) feet of the dwelling is protected by a minimum of 5/8 inch fire-rated drywall and provided no openings in the exterior wall of the accessory building are closer than six (6) feet to the dwelling.
Section R303 is amended by adding thereto the following:
R303.9 Basement light and ventilation. Natural light and ventilation area equal to 2% of the floor area shall be provided in unfinished basements.
Section R305.1 is amended by substituting 7 feet, 6 inches for 7 feet.
Section R307 is amended by adding thereto the following:
R307.3 Privacy required. Every water closet, bathtub or shower required by this code shall be in a room which will afford privacy to the user.
Section R309.1 is amended by substituting “1-3/4 inches” for “1-3/8 inches”.
Section R309.1 is amended by adding thereto the following:.
R301.1.3 Attic access. All attic access opening in rated garage ceilings shall be constructed so as to maintain a 20 minute fire rating.
Section R309.2 is amended to read as follows:
R309.2 Separation required. The garage shall be separated from the residence and its attic area by not less than 5/8 inch type X gypsum board applied to the garage side. Garages beneath habitable rooms shall be separated from the rooms above by not less than 5/8 inch type X gypsum board or equivalent. Where the separation is a floor-ceiling assembly, the structure supporting the separation shall also be protected by not less than 5/8 inch type X gypsum board or equivalent. Steel columns and beams shall be protected by not less than 5/8 inch type X gypsum board or equivalent.
Section R309.3 is amended by adding thereto the following:
R309.3.1 Gas curb. The floor of an attached garage shall be at least 6 inches below the finished floor elevation of the dwelling or be provided with a curb or other approved barrier.
Section R310.1 is amended by substituting “36 inches” for “44 inches”.
Section R310.2.1 is amended by substituting “36 inches” for “44 inches”.
Section R311.4.3 is amended by deleting exception #1.
Section R317.2 is amended by adding thereto the following:
When the units on both sides of a dwelling unit separation are protected by an automatic sprinkler system, the separation wall fire resistance rating may be reduced to not less than one hour. Such wall shall not contain plumbing, mechanical equipment, ducts or vents and electrical installations shall be in accordance with section R317.3.
Section R319.1 is amended by adding thereto the following:
8. All exterior wood porches, decks, stairs and ramps.
Section R319.1.4 is amended by adding the following:
Wood columns and posts shall not be embedded in concrete.
Chapter Three is amended by adding thereto the following section:
Section R325 Automatic Fire Sprinkler System (See also sections 11-2-8 (Section 903.6.2.1), 11-5-1 and 11-5-2 of this title)
R325.1 General. An automatic fire sprinkler system shall be installed in accordance with this section.
R325.2 Detached dwelling. Any newly constructed dwelling 4,000 square feet or more in gross floor area shall be provided with an automatic fire sprinkler system. Gross floor area is defined as the floor area within the inside perimeter of the exterior walls of the building, exclusive of basement, attached garage less than 650 sq. ft. in size, screen rooms less than 240 sq. ft., shafts, courts, without deduction for corridors, hallways, stairways, closets, the thickness of interior walls, columns or other features.
R325.3 Townhouse dwelling. An approved automatic fire sprinkler system shall be installed in townhouse units in accordance with section 903.3.1 of the International Building Code, 2006 edition.
R325.4 Installation. An automatic fire sprinkler system shall be a system designed and installed in accordance with NFPA 13-02, NFPA 13D-02 or NFPA 13R-02.
R325.5 Retroactivity. Any detached dwelling constructed after and not required to install an automatic fire sprinkler system per section R325.2 shall install such a system should the building be added onto resulting in a gross floor area of 4,000 sq. ft. or greater.
Section R402.1 is amended by adding thereto the following:
R402.1.1 Stoop foundation. A foundation system below frost or wing walls shall be provided for a porch, terrace slab, concrete or masonry steps and stoops which adjoin the foundation.
Section R402.1 is deleted in its entirety as wood foundations are prohibited.
Section R403.1 is amended by deleting any reference to wood foundations.
Section R403.1.1 is amended by adding thereto the following:
The minimum size footing shall be 18 inches. All footings shall have a minimum 2 inch by 4 inch keyway to be centered under the wall.
Section R403.1.6 is amended by deleting exceptions 1, 2 and 3 thereby prohibiting the use of foundation anchor straps as anchor bolts and requiring all walls to be anchored to the foundation.
Section R403.2 is deleted in its entirety as wood footings are prohibited.
Section R403.3.3 is deleted in its entirety as shallow foundations are prohibited.
Section R404 is amended by deleting any reference to masonry foundation walls, thereby prohibiting their use.
Section R404.2 is deleted in its entirety as wood foundation walls are prohibited.
Section R405 is amended by deleting any reference to wood or masonry foundations as they are prohibited.
Section R406 is amended by deleting any reference to wood or masonry foundations as they are prohibited.
Section R407 is amended by adding thereto the following:
R407.4 Prohibited columns. Wood columns shall be prohibited below grade elevation (in basements and crawl spaces) unless approved by the code official because of special circumstances. Steel posts and columns supporting floor framing shall be a minimum 3 inches in diameter and filled with concrete.
Section R408.4 is amended by adding thereto the following:
The minimum clearance between the ground below and the floor joist above shall be 30 inches.
Section R408.5 is amended by adding thereto the following:
R408.5.1 Vapor barrier. The soil in a crawl space shall be covered with a continuous layer of minimum 6-mil polyethylene ground cover lapped a minimum of 12 inches at joints and extended to all foundation walls enclosing the crawl space. A continuous topping of stone ballast shall be placed uniformly over the cover to a depth of at least 2 inches.
Figure R502.2 is amended to require all headers and trimmer joists to be doubled and all joists to header connections to be with approved joist hangers or ledgers.
Section R502.7.1 is amended by substituting “8 inches” for “12 inches”.
Section R504 is deleted in its entirety as floors on ground are prohibited.
Section R506.1 is amended by substituting “4 inches” for “3-1/2 inches”.
Section R506.2.2 is amended by deleting the exception and to read as follows:
R506.2.2 Base. A 4-inch thick base course consisting of compacted clean gravel, crushed stone or crushed blast-furnace slag passing a 2-inch sieve shall be placed on the prepared subgrade when the slab is below grade. Pea gravel is prohibited below slabs unless contained.
Section R506.2.3, exception 1 is amended by changing garage to detached garage, thereby requiring an approved vapor retardant for attached garages.
Section R602.3.2 is amended by deleting the exception.
Section R602.5 is amended by adding thereto the following:
Partition walls utilizing fat studs may not exceed 30 inches in width.
Section R602.7 is amended by adding thereto the following:
Minimum header size shall be doubled 2 inch by 6 inch nominal lumber.
Section R602.7.1 is amended to read as follows:
R602.7.1 Wood structural panel box headers. Wood structural panel box headers shall be constructed in accordance with Figure R602.7.2 and Table R602.7.2. The use of plywood box headers shall be by special permission of the code official and then limited to accessory buildings and structures.
Section R602.8, #4 is amended by adding thereto the following:
Approved materials shall comply with ASTM E119 and ASTM E814.
Section R602.8.1 is amended by substituting a depth to thickness ratio of 4 to 1 for the ratio 6 to 1.
Section R602.8.1 is amended by deleting any reference to baits or blankets of mineral or glass fiber or other non-rigid material used as fireblocking as they are prohibited.
Section R602.8.1.1 is deleted in its entirety.
Section R702.5 is amended to read as follows:
R702.5 Other finishes. Wood veneer paneling and hardboard paneling shall be placed on wood or cold-formed steel framing spaced not more than 16 inches on center. All wood veneer and hardboard paneling shall have not less than one-half inch gypsum board backer. Wood veneer paneling not less than one-forth inch nominal thickness shall conform to ANSI/HPVA HP-1. Hardboard paneling shall conform to ANSI/AHA A 135.5.
Section R802.9 is amended to read as follows:
R802.9 Framing of openings. Openings in roof and ceiling framing shall be framed with double header and trimmer joists. The header and trimmer joists shall be of sufficient cross section to support the ceiling joists or rafter framing into the header. Approved hangers shall be used for the header joist to trimmer joist connection and to connect the header to the joist or rafter. Tail joists over 12 feet long shall be supported at the header by framing anchors or on ledger strips not less than 2 inches by 2 inches.
Section R807 is amended by adding thereto the following:
R807.2 Fire rating integrity: All attic access installed in rated ceiling and walls shall be installed so as to maintain the integrity of the rating.
R807.3 Pull down stair access. Framing in attics provided with pull down type stair access shall have a minimum uniformly distributed live load for attics with storage. The stair opening shall be insulated to maintain the required R-value of the ceiling.
(Ord. 2015-11-18G, 11-18-2015)