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.
Water roof live load.
Used but they typically defined the load cases or combination stress or strength limits and deflection limits.
Live loads roof live loads snow loads rain loads wind loads and earthquake loads are all examples of variable loads.
In other words on a steep roof less material would be stacked in a concentrated area at one time to avoid having it slide off.
3 1 uniformly distributed load load case a.
The load cases b to d are for sloping roofs.
The might of the dead load or lack thereof often defines how much live load it can handle.
Roof assemblies are engineered to withstand serious structural failure due to overloading that is an excessive live load due to the build up of rain water or snow ice as predicted from the geographical climate zone.
D dead load l live load l r live roof load w wind load s snow load e earthquake load r rainwater load or ice water load.
However if the attic is intended for storage the attic live load or some portion should also be considered for the design of.
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.
Asce guidelines prescribe live loads according to categories of intended occupancy and use per building type.
The live load on a roof is the weight of any temporary objects on the roof.
Where snow isn t a problem the live load can come from people working on the roof and any equipment they take on to the.
Load case a is for a horizontal roof.
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.
Very slightly over time.
Load types loads used in design load equations are given letters by type.
Load cases for rigid supported beams the centre to centre distance of the beams is a the bending stiffness is ei and the water level over the not deformed roof at the roof edge dhw.
