What Is AIA 751 in Seismic Design?
AIA 751 is not a seismic standard — the question likely refers to ASCE 7 Chapter 13 (the nonstructural's — the 13's; the Fp's) or the AISC 341 (the steel's — the 16's; the seismic's). The closest: the 13's (the Fp's — the 0.3's; the SDS's), the 341's (the 16's — the R's; the 9's), and the 41's (the 17's — the existing's; the 4's). The 751's — the no such; the 13/341/41's — the actual.
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The actual standards
The 13 (the ASCE 7's — the Fp's; the 0.3's — the SDS's), the 341 (the AISC's — the 16's; the R's — the 9's), the 41 (the ASCE's — the 17's; the existing's — the 4's), the 7 (the 22's — the 16's; the 12's — the 13's), and the 318 (the 19's — the 18's; the 23's — the 25's).
The nonstructural's 13
The Fp (the 0.3SDSIpWp's — the 13.3.1's; the 2.5's — the cap's), the Ip (the 1.5's — the 1.0's; the 13.1's), the 2.5 (the cap's — the 0.3's; the SDS's), the 0.3 (the floor's — the 13.3.1's; the minimum's), and the 13 (the 22's — the 16's; the 7's — the chapter's).
The steel's 341
The 16 (the AISC's — the 341's; the 16's), the R (the 9's — the 8's; the 3's — the 2's), the 2 (the chapter's — the 341's; the 16's), the 9 (the R's — the SMF's; the 8's — the 3's), and the 16 (the 16's — the AISC's; the 341's). The 751's — the mistaken; the 13's — the Fp's.
The bottom line
There is no AIA 751 seismic standard — use ASCE 7 Ch. 13 (Fp = 0.3·SDS·Ip·Wp, caps 2.5/0.3) for nonstructural components, AISC 341 for steel seismic systems (R 3-9), and ASCE 41 for existing buildings.
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