Use ibc 2003 0 psf 20 psf.
Roof live loading required by the ibc.
Section 1603 1 3 ground snow load pg minimum ground snow load shall be 30 psf county amendment minimum flat roof snow load pf if applicable.
Flat roof snow loads of 30 psf 1 44 kn m 2 or less and roof live loads of 30 psf 1 44 kn m 2 or less need not be combined with seismic loads.
The roof live load used in the whole or in part in flood hazard areas as established in section 1612 3 the documentation pertaining to design.
And the appropriate live loads as prescribed in this.
If required in section 1612 5 shall be included and the fol.
Section or as set forth in table 1607 1.
Live loads roof live loads snow loads rain loads wind loads and earthquake loads are all examples of variable loads.
If none specified pf will be calculated per asce 7 ibc.
Shall be designed to resist wind and where applicable snow and earthquake loads in addition to the dead load of construction.
Floor live rhe unitormly distributed con bearing values of soils shall be shown on the construction centrated and impact floor live load used in the design shall be indicated for floor areas.
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.
County amendment d snow loads.
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.
These loads are not considered to be per manent because of their inherent degree of variability with respect to time see the definition of loads in ibc 202.
International building code 1607 11.
These elements are now required to be designed for 75psf if they happen to be less than 10 feet.
The state has amended the snow load requirements from the ibc through administrative rule r156 56.
The structural supports of roofs and marquees.
Minimum roof live load is 30psf.
When required for steep slope roofs section 1507 in the ibc and section r905 1 2 of the irc specify the use of an ice barrier that consists of either two layers of underlayment cemented together or a self adhering polymer modified bitumen sheet at eaves and valleys.
C roof live loads.
Where flat roof snow loads exceed 30 psf 1 44 kn m 2 20 percent shall be combined with seismic loads.
