I thought I was having a senior moment, but then found it.  Section
14.4.4.5 (2) (02 edition) says to NOT include tie-in drain piping in
hydraulic calcs.

Ed Kramer
Littleton, CO


>
>If it is a drain line, you would include it in the hydraulic calculations
>WHY??
>
>
>
>Jeff Hewitt, PE, SET, SFPE (Prof. Member)
>Corporate Engineer
>Bi-State Fire Protection Corporation
>636-946-0011
>636-946-5172 (FAX)
>
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>----- Original Message -----
>From: <[EMAIL PROTECTED]>
>To: <[email protected]>
>Cc: <[email protected]>;
><[EMAIL PROTECTED]>
>Sent: Thursday, June 28, 2007 9:39 AM
>Subject: RE: Gang Drain for Attic Dry System
>
>
>> Even though the 1 inch pipe does not seem to increase the gridding
>effect,
>> it still must be provided in the hydraulic calculations where it can end
>> up
>> show some surprising effects.
>>
>> Thank You
>>
>> Rahe Loftin, P.E.
>> Region 7 - GSA
>> Office - 817-978-7299
>> Fax - 817-978-8644
>> Cell - 817-371-3102


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