What I am trying to do is determine if clearance is required. I'm not 
going to take time to detail what a mess this is right now, but the 
Vic rep should be very happy.


At 03:59 PM 1/22/2010, you wrote:
>I think you are missing an underlying philosophical point to seismic
>protection.  Different parts of the system do one of two things:  they
>either move with the surrounding structure or they move differentially
>from that structure.  Since you are allowed to use such holes as the
>hanger and you are attaching the sway braces to the same main that are
>anchored to the same structural family, I'm going with they are in the
>move together portion of the system. As such, why do you want
>clearance?  Granted we are NOT talking branch lines that wave to their
>own tune.
>
>Roland
>
>On Jan 22, 2010, at 12:33 PM, Todd Williams wrote:
>
> > I ma working on a job where the engineer wants to run the mains
> > through penetrations in steel beams. The question came up about
> > clearance between the penetration and the pipe. Section 9.3.4 does
> > not specifically address beams, but it is referenced in the handbook
> > commentary under 9.3.4.1. Any thoughts on what minimum penetration
> > size is required?
> >
> > Todd G. Williams, PE
> > Fire Protection Design/Consulting
> > Stonington, Connecticut
> > www.fpdc.com
> > 860.535.2080
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>
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080  
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