RE: SEISMIC: Roof Supported Equipment[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: RE: SEISMIC: Roof Supported Equipment
- From: "Polhemus, Bill" <bill.polhemus(--nospam--at)tyson.com>
- Date: Wed, 18 May 2005 08:21:57 -0500
I'm really not worried about the building--I figure the diaphragm is more than adequate to take it.
I'm actually concerned about the equipment itself, along with the platform. Wouldn't want to see it go rolling in a hypothetical seismic event.
But with it being on a roof, and the Site Classification being probably a "C", I just don't think there's going to be much "there" there.
From: Eli Grassley [mailto:elig(--nospam--at)psm-engineers.com]
Sent: Tuesday, May 17, 2005 6:37 PM
Subject: RE: SEISMIC: Roof Supported Equipment
If you are confident that the weight of the additional equipment is just a drop in the bucket as far as the overall building structure is concerned, then you really only need to design the attachments of the new equipment to the existing (refer to ASCE7-02, section 18.104.22.168).
If you meet the criteria, just use ASCE equation 22.214.171.124-1 to get the amplified lateral force that acts on the equipment at the connection elevation.
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