Irontrussman
Structural
In ASCE 7-05 the Roof Slope Factor C[sub]s[/sub] provides for a slippery roof surface (fig. 7-2), which can greatly reduce the snow load. But, when calculating unbalanced roof loads the roof surface does not come into play, and because the worst case is used to design structure, this effectively negates the effect of having a slippery roof. Is this correct or did I miss something?
Another thing I find odd is that the unbalanced snow load is calculated differently whether the roof is trussed or raftered (7.6.1). Why should the structure under a roof make a difference as to how the snow is distributed on the roof? Anyone care to comment?
Another thing I find odd is that the unbalanced snow load is calculated differently whether the roof is trussed or raftered (7.6.1). Why should the structure under a roof make a difference as to how the snow is distributed on the roof? Anyone care to comment?