Roof Snow Load Zones For Ny

The total roof snow load including additional loading effects due to drifting snow sliding snow unbalanced loading conditions and partial loading conditions shall not be less than 40 psf for roofs with a slope less than or equal to 5 degrees and shall not be less than the slope factor c s times 40 psf for roofs with a slope greater than 5 degrees.

Roof snow load zones for ny. 1610 8 snow pockets or wells. In this case the sloping roof with snow guards shall be designed for the unit snow loads required for a flat roof. Why snow load information. In some cases this lo ad may be reduced for a sloped roof to account for sliding snow and improved drainage of meltwater.

On the low roof if proper snow guards are provided on the high roof. Apa e30 01 american plywood association engineered wood construction guide e 30 indicates that 7 16 osb for roof sheathing with supports 24 o c. Where flat roof snow loads exceed 30 psf 1 44 kn m 2 20 percent shall be combined with seismic loads. Edition of the residential code of new york state.

Until that time reference standard e 30 is to be utilized for selection of roof and floor plywood sheathing. As an example the flat roof snow load for a roof located in a 55 psf snow z one is typically 70 of 55 or 38 5 psf. In areas of the state outside of certified local government jurisdictions the design snow load shall be based on the ground snow loads developed in snow loads for structural design in montana authored by f f. This downward imposed load on the home is also known as the snow load.

Schilke civil agricultural engineering montana state university august 1989. 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. The north zone design live load equates to 40 pounds per square foot the middle zone equates to 30 pounds per square foot and the south zone equates to 20 pounds per square foot. However for roofs having a non slippery.

Crane hook loads need not be combined with roof live load or with more than three fourths of the snow load or one half of the wind load. 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. The north zone middle zone and the south zone are identified on the roof load zone map above. Use our new york ground snow loads map to easily determine the ground snow load 2010 building code of new york state.

The minimum design roof snow load. By multiplying the gsl by 0 7 or 70 of the ground snow load. May only be used where the roof live load design snow load is 40 psf or less. Account shall be taken of the load effects of potentially excessive snow accumulation in pockets or wells of roofs or decks.

Chapter 16 section 1608 for any location in the state of new york.