Utah Roof Snow Load

Flat roof snow loads of 30 pounds per square foot 1 44 knm 2 or less need not be combined with seismic loads.

Utah roof snow load. Pg po 2 s 2 a ao 2 0 5 for a greater than ao and pg po for a less than or equal to ao. Where flat roof snow loads exceed 30 pounds per square foot 1 44 knm 2 the snow loads may be reduced in accordance with the following in load combinations including both snow and seismic loads. Roof diaphragm should be evaluated by a structural engineer to determine whether the diaphragm needs to be upgraded to meet current seismic requirements as required by current state building code. Title 15a chapter 3 section 107 for any location in the state of utah.

Local building code determines roof snow load and it will be based on the average amount of precipitation in the region. According to title 15a chapter 3 section 107 of the utah code a roof s snow load may be determined with the following equation rounded to the nearest 5 psi. Use our utah ground snow loads 2019 map to easily determine the historical ground snow load utah code. Why snow load information.

Ws as calculated below shall be combined with seismic loads. A great deal of confusion currently exists among engineers architects recreation specialists and maintenance personnel concerning the proper snow loading to use for the design and maintenance of trail bridges building roofs and other structures in mountainous high snow load areas. You can click on the map below to find the design ground snow load for that location. Foot in valley areas.

For example the roof snow load in salt lake county is 30 pounds per square foot. They will design the roof frame to be able to easily withstand at least 30 pounds per square foot they have to or else the roof won t be up to code and the roofing permit won t pass inspection. The map may be right clicked at the location of interest which will enter in the latitude and longitude of that location automatically into those fields. Where flat roof snow loads exceed 30 psf 1 44 kn m 2 20 percent shall be combined with seismic loads.

If you live in the us our snow load calculator compares the total weight on your roof with the permissible load calculated according to the standards issued by the american society of civil engineers regarding the minimum design loads for buildings and other structures asce7 16. Roof snow load 35 lbs or more sq. The latitude and longitude of the site may be entered on the top line. Your roofing contractor will build your home according to these guidelines.

The utah ground snow load map uses three options for location input. Flat roof snow loads of 30 pounds per square foot 1 44 knm2 or less need not be combined with seismic loads. Seismic load d wind 90 mph. When new roofing systems will increase the roof load on a building then the roof deck.

Where flat roof snow loads exceed 30 pounds per square foot 1 44 knm2 the snow loads may be reduced in accordance with the following in load combinations including both snow and seismic loads. Certain jurisdictions shaded grey have specific snow load requirements per table 1608 1 2 b that differ from the values given by.