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Re: Collateral - Dead or Live?

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I consider it to be a live load. First it is unpredictable: is it lighting or mechanical, where will it be and are there going to be sprinklers and are there concentrated loads.  I had job a few years ago where the pre-eng bldg manuf'r treated collateral as a dead load.  When the sprinklers were installed, some of the purlins were found to be over-stressed after the site review engineer questioned the location and method of attachment (site review or observation is mandatory in Canada for jobs over 600 sq m or 3 stories).  If the designer had used a live load factor of 1.5 instead of the dead factor of 1.25, some of the checking and changes would not have been necessary. As I was not the PEMB designer I don't know what they did or didn't do to satisfy themselves that every thing was hunkey-dorey.

On 9/15/2010 1:15 PM, fsrahbar(--nospam--at) wrote:
Dead Load.
Farzin S. Rahbar, SE
Vice President
David C. Weiss Structural Engineer & Associates, Inc.
(818) 227-8040 Ex. 13 Fax: (818) 227-8041

-----Original Message-----
From: Adam Vakiener <avakiener(--nospam--at)>
To: seaint(--nospam--at)
Sent: Wed, Sep 15, 2010 7:31 am
Subject: Re: Collateral - Dead or Live?

I consider it to be a dead load.  All of the Metal Building Manufacturers that I have dealt with do the same.

Adam Vakiener, P.E.
Structural Engineer
Southern A & E, LLC

On Wed, Sep 15, 2010 at 6:48 AM, Jim Getaz <jgetaz(--nospam--at)> wrote:
                Poll: If you use the term collateral load or if it is used on some of your projects, do you consider it a dead load or a live load?
        Thank you,
        Jim Getaz
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