I did a loading dock that way once about 20 years ago. On Fri, Feb 22, 2008 at 7:25 AM, Mike Brown (TECH- GVL) <[EMAIL PROTECTED]> wrote: > That has been in NFPA 13 for ages but in 37 years I have never seen on done > that way. > Mike Brown > > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ken Holsopple > (forum) > Sent: Friday, February 22, 2008 9:51 AM > To: [email protected] > Subject: RE: Dry HSW under open framed 2x's > > To all.... > > Looking at A.8.14.7 in 13 (02 ed), it looks like you are allowed to angle (@ > a 45ºangle) a dry pendent through the wall without regard to construction > type. What would be the downside to doing this with a sidewall? (Other than > it does not show an HSW in the picture) Wouldn't the spray pattern develop a > little better? > > Ken Holsopple > Rowe Sprinkler Systems, Inc. > > > I'm noticing a lot of small exterior canopies being protected with dry > horizontal sidewall > sprinklers even though it is open framing (usually 2X6's or 2X10's at 24" > o/c) without any type of material fastened to the underside of this framing > - which is all good and well since it mostly complies with NFPA #13 '07 ed > section 8.4.2 except that it's not 'SMOOTH.' So I guess that's my question, > they aren't smooth so how are people getting away with this? Smooth being > defined as sructural members being spaced more than 7'-6" o/c. per A3.7.2. > > The only thing I can come up with is A8.15.7 where you can install a > *pendant* at a 45 degree angle to protect small unheated areas so if it's > okay for a pendant why not a HSW? (I'm sure it has to do with the > intracacies of unfamiliar testing and listing requirements of a pendant over > a hsw???) > > Any thoughts? > > Thx, > -B- > > > Below are the sections talked about: > > NFPA #13 2007 ED. > 8.4.2 Sidewall Spray Sprinklers. Sidewall sprinklers shall only be installed > as follows: > (1) Light hazard occupancies with smooth, horizontal or sloped, flat > ceilings > (2) Ordinary hazard occupancies with smooth, flat ceilings where > specifically listed for such use > (3) To protect areas below overhead doors > > > A.8.15.7 Small loading docks, covered platforms, ducts, or similar small > unheated areas can be protected by dry-pendent sprinklers extending through > the wall from wet sprinkler piping in an adjacent heated area. Where > protecting covered platforms, loading docks, and similar areas, a dry > pendent sprinkler should extend down at a 45 degree angle. The width of the > area to be protected should not exceed 7½ ft (2.3 m). Sprinklers should be > spaced not over 12 ft (3.7 m) apart. (See Figure A.8.15.7.) > > > A.3.7.2 > (3) Smooth Ceiling Construction. The term smooth ceiling construction as > used in this standard includes the following: > (a) Flat slab, pan-type reinforced concrete > (b) Continuous smooth bays formed by wood, concrete, or steel beams spaced > more than 7½ ft (2.3 m) on centers - beams supported by columns, girders, or > trusses > (c) Smooth roof or floor decks supported directly on girders or trusses > spaced more than 7½ ft (2.3 m) on center > (d) Smooth monolithic ceilings of at least ¾ in. (19 mm) of plaster on > metal lath or a combination of materials of equivalent fire-resistive rating > attached to the underside of wood joists, wood trusses, and bar joists > (e) Open-web-type steel beams, regardless of spacing > (f) Smooth shell-type roofs, such as folded plates, hyperbolic paraboloids, > saddles, domes, and long barrel shells > (g) Suspended ceilings of combustible or noncombustible construction > (h) Smooth monolithic ceilings with fire resistance less than that > specified under item (d) and attached to the underside of wood joists, wood > trusses, and bar joists > > > --------------------------------- > Looking for last minute shopping deals? Find them fast with Yahoo! Search. > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) >
-- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
