True but that's not what I think Gregg is talking about. Gregg says the
ductwork is not support by the plastic pipe. So then why is the pipe bowed?
I'm thinking some part is resting on the pipe causing the bow or better
pushing it down. IMHO that is the definition of pipe supporting the duct.
So I says no even if it's within the guidelines Thom speaks of. Think of it
this way how are you going to defend yourself if this coincidently breaks in
this area. I can almost guarantee the owner's insurance "special expert" is
going to call it this way. You also have vibration rubbing against the pipe
when the HVAC is running. Real risk? I don't know but I do know I don't
want to assume it.
Chris Cahill, P.E.
Fire Protection Engineer
Sentry Fire Protection, Inc.
763-658-4483
763-658-4921 fax
Email: [EMAIL PROTECTED]
Mail: P.O. Box 69
Waverly, MN 55390
Location: 4439 Hwy 12 SW
Waverly, MN 55390
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Thom McMahon
Sent: Thursday, March 13, 2008 12:23 PM
To: [email protected]
Subject: Re: Plastic Pipe bowing
Blazemaster (TYCO) installation instructions & tech handbook Jan 2005 lists
Permissible bending deflections in table "J" based upon size of pipe and
length.
Example: 1" cpvc is allowed to bend or deflect 6.3" in 5'-0" (5'-0" also
just happens to be the max hanger spacing for 1".
Sounds like you have a compound deflection (bow) so 1/2 the allowed would
seem appropriate.
Thom McMahon
Firetech, Inc.
2560 Copper Ridge Dr
Steamboat Springs, CO 80488-2136
Tel: 970-879-7952
Fax: 970-879-7926
----- Original Message -----
From: "Gregg Fontes" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, March 13, 2008 11:04 AM
Subject: Plastic Pipe bowing
>I was asked by a fire inspector if it is allowed to have mechanical
>ductwork
> bow plastic pipe? The ductwork is not support by the plastic pipe. It is
> in a tight spot where the ductwork is installed above the plastic pipe and
> due to the limited space, it is bowing the pipe. What the picture shows
> is
> it looks like there is about 16" of space between the pipe and deck and
> the
> 18" diameter flex is above the pipe. This is bowing the plastic pipe.
> The
> inspector is saying that they can't find anything in code that would not
> allow this. They don't like it, but can't find anything to hang the hat
> on.
>
>
> Thanks,
> Gregg Fontes
> Cen-Cal Fire Systems, Inc.
> (209)334-9119
>
>
> _______________________________________________
> Sprinklerforum mailing list
> [email protected]
> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
>
> To Unsubscribe, send an email to:[EMAIL PROTECTED]
> (Put the word unsubscribe in the subject field)
>
>
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
To Unsubscribe, send an email to:[EMAIL PROTECTED]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
To Unsubscribe, send an email to:[EMAIL PROTECTED]
(Put the word unsubscribe in the subject field)
