(A) All detached one- and two-family dwellings and multiple single-family dwellings (townhouses) not more than three stories in height with separate means of egress built or located within the town from and upon adoption of this subchapter shall be constructed in accordance with the requirements of the International Residential Code (IRC), 2018 Edition, as published by the International Code Council (ICC). Including appendices, A, B, C, D, E, F, G, H, K, N and P, and excluding appendices I, J, L, M, O, Q, R, S and T.
(B) The said Code is incorporated herein by reference as if the same were more fully herein set out except as follows:
(1) Section R101.1 Title. Delete (Name of Jurisdiction). Insert (Town of Star Valley Ranch).
(2) Section R102.7 Existing structures. The first sentence shall read: “The legal occupancy of any structure existing on the date of adoption of this code shall be permitted to continue without change, except as is specifically covered in this code or as is deemed necessary by the building official for the general safety and welfare of the occupants and the public”.
(3) Section R105.2 Work exempt from permit. Under Buildings paragraph 2, fences shall be deleted in its entirety.
(6) Section R113.4 Violation penalties. “Penalties for infractions are described in the Town of Star Valley Ranch Code, Chapter 35.”
(7) Section R114.1 Notice to owner or the owner’s authorized agent. Add a sentence to read: “Any person who shall continue work after having been severed with a stop work order, except such work as that person is directed to perform to remove a violation or unsafe condition, shall be liable to fine as described in the Town of Star Valley Ranch Code, Chapter 35.”
(8)
R301.1 Design. Add the following: “Residential structures, regardless of occupancy, 5,000 square feet or larger on the main living floor, shall be protected by an approved automatic fire sprinkler system, installed in accordance with further requirements of the IRC and/or NFPA 13, 13D or 13R, whichever applies, based on type of occupancy and use of structure.”
(9) Section R301.1.3 Engineered Design. At the end of the first paragraph add: “All new residential structure as defined in the IRC, remodels involving structural members within the residence, or any construction adding additional living space as part of the residence, as well as irregular and/or two story accessory buildings including trusses shall have all structural calculations approved by a professional civil or structural engineer licensed in the State of Wyoming bearing their stamp or seal”. Because of the high snow load requirements and the seismic zone all structural calculations must be done in accordance with the 2018 International Building Code (IBC) 2018 edition.
(10) Table R301.2(1) Climatic and Geographic Design Criteria:
Roof snow load (per 100 lbs. sq. ft.) | 100 |
Seismic design category | D |
Frost line depth (inches) | 36 |
Air freezing index | 2531 |
Wind speed (mph) | 115 |
Weathering | Severe |
Winter design temp | Neg. 30° |
Mean annual temp | 38° |
Ice barrier underlayment required | Yes |
Manual J Design Criteria
|
Manual J Design Criteria
| |
Elevation (feet) | 6268 |
Latitude | 42.9714°N 110.9556°W |
Altitude correction factor | 0.84 |
Winter heating | Neg. 7° |
Summer cooling | 85° |
Indoor design temp | 70° |
Design temp cooling | 68° |
Heating temp difference | 15° |
Cooling temp difference | 18° |
Wind velocity heating (mph) | 15° |
Daily range | H |
Wind velocity cooling (mph) | 7.5 |
Winter humidity | Low |
Summer humidity | 50% |
(11) Section R302.13 Fire protection of floors. Delete in its entirety.
(12) Section R309.5 Fire sprinklers. Delete in its entirety.
(13) Section R313 Automatic fire sprinkler systems. Delete in its entirety.
(14) Section R403.1.4 Minimum depth. The first sentence shall be revised to read: “Footings subject to frost shall have a minimum depth of 36 inches from finished grade to the bottom of the footing”.
(15) Section R403.1.4.1 Frost protection. Remove item number 2 in its entirety. Change exception 1 to read. “Freestanding accessory structures with an area of 600 square feet or less and an eave height of ten feet or less shall not be required to be protected”.
(16) Section R403.3 Frost-protected shallow foundations. Shall be replaced with a sentence reading: “Frost protected shallow foundations are prohibited”.
(17) Section N1102.1.2 (R402.1.2) Insulation and fenestration criteria. Delete Table in its entirety and insert Town Values.
Town Values | |
Climate zone | 7 |
Minimum Insulation R-Values
|
Minimum Insulation R-Values
| |
Minimum glazing factor | 0.35-Windows--Skylights-0.55 |
Ceilings | R-49 |
Walls | R-21 |
Floors | R-21 |
Basement walls | R-13 |
Slab perimeter and depth | R-13-36" |
Crawl space walls | R-10 |
(18) Section N1102.1 (R402.1) General (Prescriptive). Amend by adding the following: In addition to these requirements, homes with exterior log walls shall meet the following requirements.
(a) Logs in exterior walls shall have a minimum dimension of 8 inches and shall have all spiral cracks greater than one-quarter-inch sealed in an approved manner.
(b) Roof insulation shall be a minimum R-49.
(c) The primary heating source shall have a minimum AFUE rating of 90.
(d) Fenestration shall not exceed 30% of the gross conditioned wall area above grade. To determine allowable wall area of walk out (daylight) basements, the wall must have a minimum of 6-foot exposure from finished grade. The 30% limit can be exceeded only if the designer can demonstrate that the UV total of the proposed design is less that the UA total of the same structure with 30% fenestration total and code minimum insulation and fenestration values using the RestCheck or other approved software programs.
(19) Section 1102.4.1.2 (R402.4.1.2) Testing. Delete this section in its entirety.
(20) Section N1103.3.3 (R403.3.3) Duct testing (Mandatory). Delete in its entirety.
(21) Section N1103.3.4 (R403.3.4) Duct leakage (Prescriptive). Delete in its entirety.
(22) Section N1103.3.5 (R403.3.5) Building cavities. (Mandatory). Delete in its entirety.
(23) Section N1107 (R501) Existing buildings-general. Delete in its entirety.
(24) Section M1701.1.1 Buildings of unusually tight construction. Add the first sentence to read as follows: “In all structures containing habitable space or unusually tight construction, combustion air shall be obtained from the outside the thermal envelope.
(25) Section G2445.7 (621.7) Unvented decorative room heaters. A second sentence shall be added: “Unvented log heaters shall not be installed in habitable rooms or spaces or any space meeting the requirements of unusually tight construction”.
(26) Section P2603.5 Freezing. The last sentence shall be revised to read “Water service pipes shall be installed not less than 72 inches deep”.
(27) Section P3103.1.1 Roof extensions. Shall be revised to read: “Open vent pipes that extend through a roof shall be terminated at least 16 inches above the roof or 6 inches above the anticipated snow accumulation, whichever is greater.”
(Prior Code, § 6.05.010)
(Ord. 2021-23, passed 1-19-2022)