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Re: ap & Rp of Rooftop AC units

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See comments below
----- Original Message ----- 
From: "James Lin" <se3949(--nospam--at)yahoo.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Tuesday, May 08, 2001 6:02 PM
Subject: ap & Rp of Rooftop AC units


> Hi everyone, I just want to know How to determine the
> lateral earthquake load of rooftop AC units.
> 
> Question #1: Regular rooftop AC units
> A) ap=1.0 & Rp=3.0 (UBC97, Table 16-O, 3B), or
> B) ap=2.5 & Rp=3.0 (UBC97, Table 16-O, 3C)
> 
Option A   Table 16-O, 3C should read "Any flexible equipment...."  

> Question #2: Same as Question #1 above but with
> Vibration Isolators?
> A) ap=2.5 & Rp=1.5 (UBC97, Table 16-O, 3B or 3C,
> footnote 14), or
> B) ap=? & Rp=? 
> 

Per footnote 14

> Question #3: Same as Question #2 above (with Vibration
> Isolators) but also with Expansion Anchors @ Isolation
> Mounting Frame?
> A) ap=2.5 & Rp=1.5, then multiply by 2 (UBC97, Table
> 16-O, 3B or 3C, footnote 14), or
> B) ap=? & Rp=? 
> 

Per footnote 14

> I am really confused here, TIA
> 
> James Lin, SE
> IDS, Inc.
> 
> 

Paul Feather


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