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 > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
