Minimum Roof Live Load

The ground snow load p gf and the flat roof snow load p and if applicable the sloped roof snow load p s shall be indicated.

Minimum roof live load.

State board of building regulations and standards. 0 9d 1 0w a load factor of 1 6 when adding to load 7. 1 2d 1 0e l 0 2s when h loads are present they shall have 6. This minimum live load is in addition to the dead load that the roof must bear.

1603 1 3 roof snow load. Rise 1 vertical per 3 horizontal to less than 1 horizontal. Arch or dome with rise 3 8 of span or greater. In areas where the ground snow load is less than 15 psf the minimum roof live load refer to section 3 4 is usually the controlling rgavity load in roof design.

Rise 1 vertical to 1 horizontal. Chapter 3 design loads for residential buildings. Where uniform roof live loads are reduced to less than 20 psf 0 96 kn m2 in accordance with section 1607 12 2 1 and are applied to the design of structural members arranged so as to create continulty the reduced roof live load shall be applied to adjacent spans or to alternate spans whichever produces the most unfavorable load effect. Where uniform roof live loads are reduced to less than 20 psf 0 96 kn m 2 in accordance with section 1607 13 2 1 and are applied to the design of structural members arranged so as to create continuity the reduced roof live load shall be applied to adjacent spans or to alternate spans whichever produces the most unfavorable load effect.

Minimum uniformly distributed live loads adapted from sei asce 7 10. These elements are now required to be designed for 75psf if they happen to be less than 10 feet. Arch or dome with rise less 1 8 of span. The roof live load used in the design shall be indicated 780 cmr 1607 11.

Roofs of buildings used for promenade or incidental assembly purposes shall be designed for a minimum load of 400 kg m2 4 kn m2 or heavier it required. Minimum design loads for buildings and other structures location uniform load psf. 3 20 residential structural design guide. For a larger map with greater detail refer to asce 7 98.

Minimum roof live loads nscp roof slope 1. Live loads on roofs table 1 3 gives lives loads on flat roofs sloping roofs and curved roofs. Per api 650 5 2 1f the minimum roof live load on the horizontal projected area of the roof is to be 20lb ft 2 or may be determined by asce 7 but shall not be less than 15lb ft 2. Prior to the 2012 ibc these roofs were designed for standard roof live loads or local ground snow loads typically in the range of 20 or 30 pounds per square foot.

A typical roof is expected to support a live load of 20 psf.