On the low roof if proper snow guards are provided on the high roof.
Roof snow load zones for ny.
Schilke civil agricultural engineering montana state university august 1989.
You can click on the map below to find the design ground snow load for that location.
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.
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.
This downward imposed load on the home is also known as the snow load.
Flat roof snow loads of 30 psf 1 44 kn m 2 or less need not be combined with seismic loads.
The north zone middle zone and the south zone are identified on the roof load zone map above.
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.
1610 8 snow pockets or wells.
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.
By multiplying the gsl by 0 7 or 70 of the ground snow load.
However for roofs having a non slippery.
In this case the sloping roof with snow guards shall be designed for the unit snow loads required for a flat roof.
Edition of the residential code of new york state.
May only be used where the roof live load design snow load is 40 psf or less.
The ground snow loads to be used in determining the design snow loads for roofs shall be determined in accordance with asce.
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.
Until that time reference standard e 30 is to be utilized for selection of roof and floor plywood sheathing.
The minimum design roof snow load.
Use our new york ground snow loads map to easily determine the ground snow load 2010 building code of new york state.
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.
Chapter 16 section 1608 for any location in the state of new york.
Account shall be taken of the load effects of potentially excessive snow accumulation in pockets or wells of roofs or decks.
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.
