Steve is correct. As he noted, 1007 is for accessible (ie ADA) stairs. Most stairs are built to 1009. Also note that projections up to 4½" are permitted to intrude into the 44" required width 'at the handrail height' (IBC 1009.11.7). So the hose valve is permitted to encroach upon the 44" clear width but the standpipe riser itself is not. There is similar wording in NFPA 101 also. Also note, the 44" clear width is a code minimum. If the stair is built larger for increased capacities, then consulting with the A/E is a good idea.
Duane Johnson, PE Program Manager Division of the Fire Marshal (Support Contractor) Office of Research Services National Institutes of Health 301-496-0487 "Protecting Science - One Sprinkler at a Time" -----Original Message----- From: Steve Leyton [mailto:[email protected]] Sent: Thursday, March 24, 2011 1:35 PM To: [email protected] Subject: RE: Standpipe Clearance Finally broke down and opened the code. Again, I'm in CA so I'm not sure what base IBC says, 1009.1 says minimum stairway width is 44" and 1007.3 (accessible egress stairs) says 48" rail to rail. I've always coordinated with architects based on clear dimensions. SML -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, March 24, 2011 9:35 AM To: [email protected] Subject: RE: Standpipe Clearance Bob, I'm not Steve,But the axis point is as Brad stated,the center of the stair landing along the last tread,measured to the side wall (handrails are allowed to project into the egress path),then swing an arc toward the end of the landing.This is the required clear path to a height of 6'-8". Lamar Vaughn,SET On Thu, Mar 24, 2011 at 12:26 PM, Bob Knight wrote: > Steve, I understand that you measure from the point nearest on the > valve or other component, but then do you measure to the nearest point > on the stair such as the railing? > > Bob > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Steve > Leyton > Sent: Thursday, March 24, 2011 10:21 AM > To: [email protected] > Subject: RE: Standpipe Clearance > > I know it's not 4'-8". It's either 45" or 48". Either way, you > radius the turn from the axis point closest to your most out-looking > point of the valve or other piece of equipment, not from the center of > the stair. Remember that this is a required CLEAR dimension, so it > has to be surface-to-surface. > > Steve Leyton > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Brad > Casterline > Sent: Thursday, March 24, 2011 9:18 AM > To: [email protected] > Subject: RE: Standpipe Clearance > > In other words, there might not be a fixed number--- if you draw an > arc from the middle of the stair to the wall, swing it across the > landing, and stay out of that space, you should be OK. > > > -----Original Message----- > From: Brad Casterline [mailto:[email protected]] > Sent: Thursday, March 24, 2011 11:06 AM > To: [email protected] > Subject: RE: Standpipe Clearance > > I would have to look up the code but the logic is: imagine someone > being carried down the stair on a stretcher- the carriers would have > to be able to make the turn... > > -----Original Message----- > From: Bob Knight [mailto:[email protected]] > Sent: Thursday, March 24, 2011 10:49 AM > To: [email protected] > Subject: Standpipe Clearance > > What is the minimum clearance required for stair railing to standpipe > or floor control valves? I've been given two different numbers of 48" > and 4'8". Does anyone have this info with code reference. We work > out of the IFC / IBC. > > Thanks, > > Bob Knight > (208) 639-8790 Direct Phone > (208) 639-8791 Direct Fax > (208) 994-1439 Cell > > > > _______________________________________________ > 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) > > _______________________________________________ > 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) > _______________________________________________ > 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) _______________________________________________ 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)
