What Is Seismic Design for Nonstructural Walls?
Nonstructural walls (the 13.5's — the Fp's; the 0.3's) are designed for (the Fp's — the 0.3SDSIpWp's; the 2.5's) via (the 13.5's — the 13.3.1's; the Ip's) and (the 2.5's — the 13.3.1's; the cap's). The design: the 13.5's (the Fp's — the 0.3's; the 13.3.1's), the Fp's (the 0.3's — the 2.5's; the 13.3.1's), the 2.5's (the 13.3.1's — the cap's; the 0.3's), and the 1.0's (the Ip's — the 13.1's; the 1.5's). The partition's — the 13.5 braced.
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The 13.5's scope
The 13.5 (the Fp's — the 0.3's; the 13.3.1's), the Fp (the 0.3SDSIpWp's — the 13.5's; the 2.5's), the 2.5 (the 13.3.1's — the 13.5's; the cap's), the 0.3 (the 13.5's — the 13.3.1's; the floor's), and the 13.3.1 (the 2.5's — the 0.3's; the 13.5's).
The Ip's values
The 1.0 (the 1.5's — the 13.1's; the normal's), the 1.5 (the 1.0's — the 13.1's; the egress's — the stair's), the 13.1 (the 1.0's — the 1.5's; the 13.5's), the 400-lb (the 20 psf's — the 13.5's; the 13.5's), and the 2.5 (the 0.3's — the 13.3.1's; the 13.5's).
Bracing
The 400-lb (the 20 psf's — the 13.5's; the 13.5's), the 20 psf (the 13.5's — the 13.5's; the 400's), the 2-inch (the 13.5's — the clearance's; the 2's), the 13.5 (the 400's — the 20's; the Fp's), and the 2.5 (the 0.3's — the 13.3.1's; the 13.5's). The wall's — the 13.5's Fp; the 400-lb's bracing.
The bottom line
Design nonstructural walls per ASCE 7 13.5 (Fp = 0.3·SDS·Ip·Wp, Ip 1.0 normal/1.5 egress-stair enclosures) — brace at 400 lb or 20 psf with 2-in top clearances; out-of-plane anchorage of tall partitions is the most common deficiency.
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