Ok, another absurd question... Background: Consider a dry standpipe system (Galvanized Sh40 throughout) in a parking garage, 6 stories open air structure, core slab / concrete. Class III Standpipe required but no sprinkler requirement, we have 6 vertical standpipes, 3 of which are located in the stairwells.
With that being said, 2010 14 - 6.1.2.2 States that "Standpipes and lateral piping supplied by standpipes shall be located in enclosed exit stairways or shall be protected by a degree of fire resistance equal to that required for enclosed exit stairways in the building in which they are located." There are 3 stairwells within this parking structure which are rated for 2 hours, just like most of the other exits and access to egress required ratings. This has been in the code for a while, but it's rare that we've been stuck doing this and even more rare that the mechanical consultant has pushed for this. They are saying 45 min based on nothing, I'm saying don't bother doing it, but if you do it should be to code and have the full 2 hour per NFPA 14. Absurd Question: Is anyone actually doing this? Is there an amendment or errata to NFPA 14 to ditch this? I can't count how many installations I've seen (and done) that have no fire resistance wrap or anything installed after the fact, or has ever been questioned really. I've only been doing this for around 15 years and this is a first for me. I don't even want to look at pricing for 2 hour wrap for around 300 feet horizontal and 6x3 standpipes around 60' each. Mike Gallello [email protected] _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
