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Re: Light Fixtures -- Seismic[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: Re: Light Fixtures -- Seismic
- From: Rlfong(--nospam--at)aol.com
- Date: Fri, 21 Nov 1997 01:25:47 -0500 (EST)
Oops. sorry for the blank response. The intent of the wire ties for suspended ceiling and the drop in light fixtures is to keep the ceiling grid up from falling down during the EQ. Thus, the four directional diagonal tie wires periodically to add some lateral rigidity to the veritical support wires. Thus, it is my understanding in the case of a light fixture suspended alone, the sway braces generally are not required, even on essential services, so long as the conduit box is adequately braced to carry the load; so long as the wire supports for the fixture are adequately rated for the load; and so long as the swing arc of the suspended lamp doesn't hit something. Only in the last case would some sort of sway bracing be required. Ron Fong Fremont, CA., who did feel dat 3.2 EQ on the Hayward fault yesterday and wonders if it actually relieves the stress; or is a precursor to the big one!
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