The intent of CP #3 is to clarify the intent that there only needs to be a single roof connection to facilitate testing. The language remains regarding a connection at the highest landing of stairs serving roof access. Many AHJ's will require manifolds at the top of all standpipes arbitrarily, as they perceive a potential value in suppression operations.
Steve Sent from my Verizon Wireless BlackBerry -----Original Message----- From: "Ed Kramer" <k...@frii.com> Date: Sat, 28 Mar 2009 10:34:26 To: <sprinklerforum@firesprinkler.org> Subject: RE: NFPA 14 roof access Thanks, John and thanks Thom. So, NFPA 14 and the IBC use slightly different phrasing (stairway access vs stair access). A ladder leading from the highest landing up to a roof hatch might qualify as 'stairway access', but not as 'stair access'. I may need a formal interpretation on this one. IBC-905.4 (5) brings up another issue. It states EACH standpipe shall provide roof protection (either on the roof or at the highest landing of stairways that access the roof). This seems to be in direct conflict with a proposed change to NFPA 14 (14-53 Log#CP3) that says only 1 standpipe need serve the roof. Of course, that change isn't final yet. While I'm on a roll, does an 'alternating tread device' qualify as 'stair access'? I assume it does. Ed Kramer Littleton, CO > 2006 IBC-905.4 Location of Class I standpipe hose connections. > Class I standpipe hose connections shall be provided in all of the > following > locations: > > 5.Where the roof has a slope less than four units vertical in 12 units > horizontal (33.3-percent slope), each standpipe shall be provided with a > hose connection located either on the roof or at the highest landing of > stairways with stair access to the roof. > > 2006 IBC-1002.1 Definitions. > > STAIR. A change in elevation, consisting of one or more risers. > > STAIRWAY. One or more flights of stairs, either exterior or interior, with > the necessary landings and platforms connecting them, to form a > continuous and uninterrupted passage from one level to another. > > 2006 IBC-1009.3 Stair treads and risers. > > Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) > minimum. Stair tread depths shall be 11 inches (279 mm) minimum. The riser > height shall be measured vertically between the leading edges of adjacent > treads. The tread depth shall be measured horizontally between the vertical > planes of the foremost projection of adjacent treads and at a right angle to > the tread's leading edge. > > ---------------------- > > I would say that a ladder does not meet the definition of a stair. Ladders > are most often provided pursuant to the mechanical code requirements where > rooftop equipment is located more then 16 ft above grade. (2006 IMC- 306.5) > > However this section of the IBC requires that a stair extend to the roof. > > 2006 IBC-1009.11 Stairway to roof. > > In buildings located four or more stories in height above grade plane, one > stairway shall extend to the roof surface, unless the roof has a slope > steeper than four units vertical in 12 units horizontal (33-percent slope). > In buildings without an occupied roof, access to the roof from the top story > shall be permitted to be by an alternating tread device. > > A four story building would most likely have a floor greater then 30ft above > lowest fire department vehicle access necessitating a standpipe pursuant to > 2006 IBC-905.3.1 Building height. In that regard the requirements appear to > be in harmony. > > Hope that helps, > > Sincerely > John Drucker > > In the 07 version, section 7.3.2 (5) says to provide hose connections "at > the highest landing of stairways with stairway access to a roof, and on > roofs with a slope of less than 3 in 12 where stairways do not access the > roof." There is a proposed change to this section, but the change > wouldn't help me. > > I assume 'stairway access' means the stair must extend to the roof level and > a person could walk-out onto the roof via a standard door. But, could it > also mean a ship's ladder leading up to a roof hatch? > > Do the building codes define "stairway access"? > > Ed Kramer > Littleton, CO _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum <http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum> For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) __________ Information from ESET NOD32 Antivirus, version of virus signature database 3971 (20090328)__________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com <http://www.eset.com> _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field)
