Wind Load Case A and B
Wind Load Case A and B
(OP)
I am doing design on an open building with monoslope roof. ASCE 7-05, Figure 6-18A has values for Cnl and Cnw, but it references Load Case A and B. I can find no clarification of what Load Case A and B are in the document. Can anyone help? Thanks






RE: Wind Load Case A and B
However, you do have the load cases 1 thru 4 listed on
Figure 6-9, and the additional applications shown on Figure 6-6.
Mike McCann
MMC Engineering
RE: Wind Load Case A and B
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.
RE: Wind Load Case A and B
RE: Wind Load Case A and B
The commentary to ASCE 7-10 does a better job of explaining the case A & B. on page 552, C27.4.3, 2nd paragraph says:
" Two load cases, A & B, are given in Figs. 27.4-4 through 27.4-6 (old Fig 6-18B to D). These pressure distributions provide loads to envelop the results from detailed wind tunnel measurements of simultaneous normal forces and moments. Application of both load cases is required to envelop the combinations of maximum normal forces and moments that are appropriate for the perticular roof shape and blockage configuration."
I think this means that use use the factors from the two load cases that give you the maximum wind pressures. I suppose that they could have called them case 1 or 2.
RE: Wind Load Case A and B