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 roof live load storage tank engineering eng tips.
Minimum roof live load.
Minimum uniformly distributed live loads adapted from sei asce 7 10.
0 9d 1 0e effect or 0 9 when resisting the load when permanent.
Arch or dome with rise less 1 8 of span.
Rise 1 vertical per 3 horizontal to less than 1 horizontal.
Minimum design loads for buildings and other structures location uniform load psf.
The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures.
Rise 1 vertical to 1 horizontal.
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Flat or rise less than 1 vertical to 3 horizontal.
Roofs used for promenade purposes shall be designed for a minimum live load of 60 psf 2 87 kn m 2.
Arch or dome with rise 3 8 of span or greater.
1 2d 1 0e l 0 2s when h loads are present they shall have 6.
0 9d 1 0w a load factor of 1 6 when adding to load 7.
2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes.
Roofs used for other special purposes shall be designed for appropriate loads as directed or approved by the commissioner.
A typical roof is expected to support a live load of 20 psf.
Roofs used for roof gardens or assembly purposes shall be designed for a minimum live load of 100 psf 4 79 kn m 2.
This minimum live load is in addition to the dead load that the roof must bear.
However if the attic is intended for storage the attic live load or some portion should also be considered for the design of.
Arch or dome with rise 1 8 of span to less than 3 8 of span.
Minimum roof live loads nscp roof slope 1.