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RE: Rooftop Units

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You are not asking too much, if this unit is sold in California, they
would also have to provide center of gravity coordinates on all three
axis for seismic restraint.

Making conservative assumptions is the best you can do if they won't
give you the required info.

-gerard
Santa Clara, CA

-----Original Message-----
From: Jim Kestner [mailto:jkestner(--nospam--at)somervilleinc.com] 
Sent: Tuesday, September 17, 2002 2:04 PM
To: 'SEAINT'
Subject: Rooftop Units

I have a large rooftop unit that sits over six joists. It is made of up
of
several components including the fan, compressor, coil sections, etc. I
am
currently reviewing data from one manufacturer who gives me the overall
size
and weight plus the corner weights. I know the compressor section is
probably the heaviest section. I have asked for the weights of the
various
components including their lengths so that I can convert those loads to
a
plf and then apply the heaviest concentrated load to the joists. In
other
words, I need more information on the distribution of weight.

The salesman is claiming that he cannot provide this info. yet I have
received this info. from other manufacturers when I have ask for it. Our
next step is to get try to get the info. right from the manufacturing
plant.

I know that there will probably be some load sharing since all the
joists
will most likely deflect together. Am I asking for too much or being too
conservative?

Jim Kestner
Green Bay, Wi


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