The West Jordan City Building & Safety Division uses the following design criteria when reviewing projects submitted for a building permit within City limits.
1. BUILDING CODES: The Building Division enforces the following building codes with State amendments.
· 2015 International Building Code
· 2015 International Residential Code
· 2015 International Plumbing Code
· 2015 International Mechanical Code
· 2015 International Fuel Gas Code
· 2015 International Energy Conservation Code
· 2016 International Existing Building Code
· 2015 International Fire Code
· 2014 National Electric Code
· 1997 Uniform Code for Abatement of Dangerous Buildings
· City of West Jordan Municipal and Development Codes
2. SNOW LOADS:
a) Site-specific: The actual snow loads vary depending upon elevation. A minimum flat roof snow load (Pf) of 30psf and ground snow load (Pg) of 43psf shall be used for sites up to 4,500 feet mean sea level. Table 1 may be used to find the minimum ground snow loads at elevations greater than 4,500 feet. For elevations not shown in Table 1 refer to Section 15A-3-107 of Utah’s “State Construction and Fire Codes Act”.
Table 1 – West Jordan City Snow Loads
* Table only valid if site elevation is within 100 feet of listed elevation.
b) Roof Snow Loads: Shall be determined per Chapter 7 of ASCE 7-10.
c) Seismic Snow: At locations where the roof snow load exceeds 30psf a percentage of the snow load must be considered in the effective seismic weight of the structure per Section 15A-3-107 of Utah’s “State Construction and Fire Codes Act”.
a) Speed: All wind speeds listed below are 3-second gust at 33 feet above the ground.
· Residential: 115 mph
· Commercial (see IBC Table 1604.5):
- Risk Category I = 105 mph
- Risk Category II = 115 mph
- Risk Category III & IV = 120 mph
b) Exposure: Site specific (per Chapter 26 of ASCE 7-10). Typically “B” or “C”.
a) Seismic Design Category:
· Residential: D2
· Commercial: D
b) Site-specific: Because ground motions tend to vary substantially throughout the city, the mapped spectral accelerations (SS & S1) should be obtained by considering the site-specific latitude and longitude values for the site and obtaining the ground motions from the “U.S. Seismic Design Maps” application developed by the USGS (http://earthquake.usgs.gov/designmaps/us/application.php).
a) Frost Depth: 30 inches.
b) Site Class: Site specific. For projects not requiring a geotechnical report (see below) Site Class ‘D’ can be assumed per Section 20.1 of ASCE 7-10.
c) Allowable Bearing Pressures:
· Foundation pressure: 1,500psf, per IRC Table R401.4.1 and IBC Table 1806.2.
· Lateral pressure: 100psf/f, per IBC Table 1806.2.
· The above listed values are maximum allowable values unless listed otherwise by a site-specific geotechnical report complying with IBC 1803.6.
d) Site-specific Geotechnical Report:
· General: All geotechnical reports submitted for permit issuance must be dated no later than two years from the permit application date. Outdated reports must be accompanied by a letter from a qualified geotechnical engineer stating that the report requirements are still valid, or stating what items may have changed.
· Residential: Residential projects meeting one or more of the following requirements must provide a site-specific geotechnical report meeting the requirements of IBC 1803.6:
- Where the building footprint is greater than 3,000 square feet, or has a gross square footage of 6,000 square feet or greater; or
- Where the grade supporting the structure has a slope equal to or greater than 20 percent; or
- Where the building is to be built on a lot in which a previous structure once existed.
· Commercial: All commercial projects require a site-specific soils report meeting the requirements of IBC 1803.6. Additions to existing facilities of less than 3,000 square feet are exempt from this requirement.
6. FLOOD HAZARDS:
a) Flood Hazard Areas:
· Residential: Buildings and structures located in flood hazard areas (i.e. Flood Zones A or V) must comply with IRC R322.
· Commercial: Buildings and structures located in flood hazard areas must comply with IBC 1612, Chapter 5 of ASCE 7-10 and ASCE 24-13.
b) Floodways: Buildings and structures located in identified floodways must be designed and constructed in accordance with ASCE 24-13.
c) Interactive Flood Zone Map: Available at the following web link…
7. RAINFALL: Average annual rainfall is 16 inches.
8. CLIMATE ZONE: 5B
9. WEATHERING: Severe
10. TERMITE: None to Slight
11. WINTER DESIGN TEMP: 8°F
12. ICE SHIELD UNDERLAYMENT: Yes
13. AIR FREEZING INDEX: = 1500
14. MEAN ANNUAL TEMP: 45°F
Last Revised: 09/2016