ASCE 7-10 - Wind Load on Box Truss - Fig 29.5-2 or 29.5-3?
ASCE 7-10 - Wind Load on Box Truss - Fig 29.5-2 or 29.5-3?
(OP)
Just as the title of the thread suggests. I've always used Fig 29.5-3 since I figured that a "trussed tower" sounded more appropriate for a box truss. However, I suppose "lattice framework" sounds similar too (Fig 29.5-2), plus it gives lower Cf values. Unfortunately, ASCE doesn't give much of an explanation of the intent of these figures, so I'm in debate. I'm just looking for what is most appropriate......any opinions?






RE: ASCE 7-10 - Wind Load on Box Truss - Fig 29.5-2 or 29.5-3?
The consensus seems to be that a lattice framework is a 2D surface, whereas a trussed tower is a 3D structure. Therefore, the Cf coefficients on the tower are increased to account for load on additional faces. This should help guide which designation is more appropriate in this case.
Brian C Potter, PE
Simple Supports - The history and practice of structural engineering.
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RE: ASCE 7-10 - Wind Load on Box Truss - Fig 29.5-2 or 29.5-3?
RE: ASCE 7-10 - Wind Load on Box Truss - Fig 29.5-2 or 29.5-3?
RE: ASCE 7-10 - Wind Load on Box Truss - Fig 29.5-2 or 29.5-3?