Seismic calc's. - Zone vs. Design Category question
Seismic calc's. - Zone vs. Design Category question
(OP)
My company designs and builds patented track underhung bridge cranes & runways, as well as underhung wire rope hoists. Occasionally a customer requires seismic calc's. for an installation. I have done calc's. for Zone 4 applications, but this customer specifies Design Category 3. A zone was not specified. I have found some info on Design Category. How does Design Category differ from Zone, and are there different calc's and acceleration factors used?
Thanks.
Thanks.






RE: Seismic calc's. - Zone vs. Design Category question
RE: Seismic calc's. - Zone vs. Design Category question
RE: Seismic calc's. - Zone vs. Design Category question
Professional and Structural Engineer (ME, NH)
American Concrete Industries
www.americanconcrete.com
RE: Seismic calc's. - Zone vs. Design Category question
RE: Seismic calc's. - Zone vs. Design Category question
RE: Seismic calc's. - Zone vs. Design Category question
RE: Seismic calc's. - Zone vs. Design Category question
RE: Seismic calc's. - Zone vs. Design Category question
SDC A = Zone 1
SDC B = Zone 2
SDC C = Zone 3
SDC D, E, and F = Zone 4, depending on several different factors.
The approximation is rough.
DaveAtkins
RE: Seismic calc's. - Zone vs. Design Category question
You get a copy of the applicable code, and you read it.
RE: Seismic calc's. - Zone vs. Design Category question
RE: Seismic calc's. - Zone vs. Design Category question
RE: Seismic calc's. - Zone vs. Design Category question
Most of the seismic information is in the ASCE 7 document though. I would recommend that you buy ASCE 7-10. The seismic loading methodology is quite a bit different than that in the UBC. There is a chapter on seismic loading of non-structural items such as cranes, although I don't think it addresses cranes directly.
RE: Seismic calc's. - Zone vs. Design Category question