20 Live Load Roof

I access provided ii access not provided 1 5 kn m 2 0 75 kn m 2 14.

20 live load roof. Roof loads flat sloping with slopes upto 10 degrees. The roof must be able to support the sum of its dead load and any anticipated live load so the roof has to be designed with a load limit that takes into account both of these loads. Roof live load may be reduced by the following equation. So with the roof dance floor example per ibc the live load would not be roof live load but live load assuming the live load magnitude exceeded 20 psf.

E earthquake load. W wind load. L live load due to occupancy. The bottom line is that the irc requires you to design the roof.

Roof loads are a downward vertical force on the home. L r l o r 1 r 2 where l r shall not be less than 12 psf and not more than 20 psf r 1 1 for a t less than or equal to 200 psf r 1 1 2 0 001 a t r 1 0 6 t greater than. In my region on cape cod we have a ground snow load design of 25 psf which is a greater design load than the live load 12 psf to 20 psf over an entire roof system. Sloping roof with slope greater than 10 degree for purlins 0 75 kn m 2 less 0 02 kn m 2 for every.

Factors that influence many factors influence how a system responds to loading. The uniform design live load in unoccupied landscaped areas on roofs shall be 20 psf 0 958 kn m 2. R nominal load due to initial rainwater or ice exclusive of the ponding contributions. The north zone middle zone and the south zone are identified on the roof.

1607 13 4 awnings and canopies. Roof load live load design is affected by the shape of the roof whether it is flat curved or pitched. The uniform design live load for occupied landscaped areas on roofs shall be determined in accordance with table 1607 1. Roof live load mrhershey structural 26 aug 18 00 36 saving grace in scenarios like this is most occupied spaces even assembly spaces don t see anywhere near 100 psf of people on a regular basis or even on an irregular basis.

Roof live load l r is defined as roof live load of 20 psf or less.