What Is Seismic Design for Nonstructural Components?
Nonstructural (the 13's — the chapter's; the Fp's) is designed for (the component — the 0.3's; the SDS's) via (the 13.3's — the 0.3SDSIpWp's; the 2.5's) and (the Ip's — the 1.5's; the 1.0's). The design: the Fp's (the 0.3's — the SDS's; the 13.3.1's), the 2.5's (the cap's — the 0.3's; the floor's), the 1.5's (the Ip's — the 1.0's; the 13.1's), and the 400-lb (the 20 psf's — the positive's; the 13.5's). The component's — the 13 designed.
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The Fp's formula
The 0.3SDSIpWp (the 13.3.1's — the Fp's; the 2.5's — the cap's), the 2.5 (the cap's — the 0.3's; the SDS's — the Ip's — the Wp's), the 0.3 (the floor's — the 13.3.1's; the minimum's), the Wp (the weight's — the component's; the 400-lb's), and the 13.3.1 (the 22's — the 16's; the 7's — the formula's).
The Ip's values
The 1.5 (the 1.0's — the 13.1's; the life-safety's), the 1.0 (the normal's — the 1.5's; the 13.1's), the 13.1 (the 22's — the 16's; the 7's — the Ip's), the 400-lb (the 13.5's — the 20 psf's; the anchorage's), and the 2.5 (the 0.3's — the cap's; the Fp's).
Anchorage
The 400-lb (the 20 psf's — the 13.5's; the positive's), the 20 psf (the 13.5's — the 400's; the attachment's), the 2.5 (the Fp's — the cap's; the 0.3's), the 1.5 (the 13.1's — the Ip's; the 1.0's), and the 13 (the 22's — the 16's; the 7's — the chapter's). The nonstructural's — the Fp's 0.3; the anchorage's — the 400-lb.
The bottom line
Design nonstructural per ASCE 7 Ch. 13 (Fp = 0.3·SDS·Ip·Wp per 13.3.1, capped 2.5x, floored 0.3·SDS·Ip·Wp; Ip 1.5 life-safety/1.0 normal) — positive attachment at 400 lb or 20 psf per 13.5.
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