Sloped Roof Snow Load Chart

Pent roof is a collection of low mono pitched roofs often seen on residential terraces.

Sloped roof snow load chart.

P s c s p f the thermal factor c t from table e 3 determines if a roof is cold or warm slippery surface values shall be used only where the roof s surface is unobstructed and sufficient space is. Horizontal distance from eave to ridge. Figure 7 1 pages 84 85 and table 7 1 page 92. On multiple factors including.

From eave to ridge w. This sizing guide for roof rafters will help determine what you need for your small project. Roofs are under a lot of pressure. The snow load is treated as a live load when you use af pa s tables.

A frame roof is the sharpest gable style roof resembling the shape of the letter a. This information is found in the code book. Roof snow load is defined as the weight of snow on the roof surface used in design of the building structure ibc 2012. It is a traditional roof shape employed everywhere from tropical.

Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. 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. Length of low roof ll. Ground snow load pg.

Ground snow load value. Length of high roof lu. The boca code recognizes this and allows you to use the horizontal projection of the roof when calculating snow loads. 2 you must determine the snow load for your region.

Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. The span would be 11 5 3 4. Boca also allows you to reduce the snow load for roofs with slopes greater than 30 degrees presumably because snow will slide or blow off steeply pitched roofs. Importance occupancy and use of the building.

Length of roof downwind of the snow drift. There are several variables to consider when determining the proper rafter size. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing. For dead loads you are correct.

Wind exposure of roof. It is determined based. Length of roof upwind of the snow drift. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run.

Load limits on the roof of a building.