Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Are Roof Top Units considered Dead or Live Loads?

[Subject Prev][Subject Next][Thread Prev][Thread Next]
I have always considered it a dead load. The value should be easily
determined and it is fixed. Roof structural support systems are often
designed for a specific layout of roof top units and any relocation or
change in load needs to be reanalyzed. The same holds true for the actual
roofing system. I have seen too many instances of single ply systems being
replaced with heavier torch down assemblies or addition of ballast without
reanalysis and consequent problems arising.

James Cohen, PE
James Cohen Consulting, PC
http://expertpages.com/jccpc

----- Original Message ----- 
From: "Daniel Boltz" <dboltz(--nospam--at)1st.net>
To: <seaint(--nospam--at)seaint.org>
Sent: Tuesday, January 04, 2005 09:58 AM
Subject: Are Roof Top Units considered Dead or Live Loads?


> I've had different answers from various Senior Engineers.  Some say that
since the RTU weight does not vary in magnitude and location, it is a DEAD
LOAD.  Others say that if the RTU is changed or moved in the future, it's
weight and location would be considered a LIVE LOAD.
>
> Any help is appreciated.
> --Dan
>
>
>
>
> ________________________________________________________________
> Sent via the WebMail system at 1st.net
>
>
>
>
>
> ******* ****** ******* ******** ******* ******* ******* ***
> *   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> *
> *   This email was sent to you via Structural Engineers
> *   Association of Southern California (SEAOSC) server. To
> *   subscribe (no fee) or UnSubscribe, please go to:
> *
> *   http://www.seaint.org/sealist1.asp
> *
> *   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you
> *   send to the list is public domain and may be re-posted
> *   without your permission. Make sure you visit our web
> *   site at: http://www.seaint.org
> ******* ****** ****** ****** ******* ****** ****** ********


******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
* 
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*
*   http://www.seaint.org/sealist1.asp
*
*   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you 
*   send to the list is public domain and may be re-posted 
*   without your permission. Make sure you visit our web 
*   site at: http://www.seaint.org 
******* ****** ****** ****** ******* ****** ****** ********