GA 620-2011_en GYPSUM AREA SEPARATION FIREWALLS《石膏分离区防火墙》.pdf

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1、GYPSUM AREA SEPARATIONFIREWALLSGA-620-2011620-2011 201012 Final:216-07.qxd 12/3/2010 8:42 AM Page 12 GA-620-2011This document may be revised or withdrawn from circulation at any time. The status of the document should beverified by the user prior to following any recommendations contained herein. To

2、 verify that you have the mostcurrent edition of the document, access the Gypsum Association website at: www.gypsum.org.GA-620-2011Copyright 2011Gypsum AssociationAll rights reserved.Printed in U.S.A.Characteristics, properties, or performance of materials or systems herein described are based on da

3、ta obtainedunder controlled test conditions and are for defined architectural or engineering end users. The Gypsum Associ-ation and its member companies make no warranties or other representations as to their characteristics, proper-ties, or performance under any variation from such conditions or in

4、 uses in actual construction.620-2011 201012 Final:216-07.qxd 12/3/2010 8:42 AM Page 23GA-620-2011IntroductionGypsum Area Separation Firewall systems provide the advan-tages of both fire-resistance and noise reduction betweenneighboring townhouses and other attached dwelling units.Gypsum Area Separa

5、tion Firewalls are efficient, nonload-bearing, 2-hour fire resistance rated drywall systems that eas-ily provide code complying STC ratings. Some of these wallsachieve STC ratings of 60-64.Gypsum Area Separation Firewalls are the walls of choice fortownhouses up to four stories in height and are com

6、patiblewith all common floor-to-ceiling heights. Gypsum Area Sep-aration Firewalls offer numerous advantages over other mate-rials historically used in these applications and are rapidlybecoming the “standard” method for separating units inmulti-family townhouse construction. Their thinner profileal

7、lows up to 6 in. (150 mm) more of usable floor space thana typical concrete block wall and reduced footing require-ments.Gypsum Area Separation Firewalls improve construction sitesafety and efficiency because they are installed one floor at atime, just like the rest of the building. No expensive sca

8、ffold-ing is required and the risk of a toppling masonry wall is com-pletely eliminated. Gypsum Area Separation Firewalls aredesigned to be fast and economical to install. Large panelsaccelerate construction and can be installed by trades alreadyon the job; concerns and scheduling problems related t

9、obringing in another trade are eliminated. Gypsum Area Sepa-ration Firewalls can be installed year-round without costlycold weather provisions for drying because there is no mortarto freeze.Performance properties of gypsum components are main-tained and product quality is assured for every gypsum sh

10、aft-liner panel by independent third party certification and label-ing. The materials come to the job site ready to install with-out the need for mixing or preparing components onsite. Sim-ply measure, cut, and install.Gypsum Area Separation Firewalls are designed and recog-nized as being code compl

11、iant. These systems are specifical-ly engineered to remain in place during a fire, even if thestructure on the fire side collapses. The aluminum clips usedto attach the steel studs to the wall separating the units willsoften on the fire side and release if the burning unit collaps-es. The clips on t

12、he non-fire side are protected by the GypsumArea Separation Firewall and will continue to support theGypsum Area Separation Firewall, allowing it to remainintact, protecting the neighboring unit.Handling and StorageAll materials shall be delivered bearing the brand name,applicable standard designati

13、on, and name of manufacturer orsupplier for whom the product is manufactured. The plasticpackaging used to wrap gypsum panel products for rail and/ortruck shipment is intended to provide temporary protectionfrom moisture exposure during transit only and is not intend-ed to provide protection during

14、storage after delivery. Suchplastic packaging shall be removed immediately upon receiptof the shipment.NoTe: Failure to remove protective plastic shipping coverscan result in condensation which can lead to damage, includ-ing mold.All materials shall be kept dry. Gypsum panel products shallbe neatly

15、stacked flat with care taken to prevent sagging ordamage to edges, ends, and surfaces. Gypsum panel productsand accessories shall be properly supported on risers on alevel platform, and fully protected from weather, direct sun-light exposure, and condensation. During installation, the bot-tom panels

16、 shall not be subjected to contact with standingwater. Temporary pumps or drainage shall be provided asneeded to protect the gypsum panels from water prior to thecompletion and startup of a permanent sump and/or drainagesystem after the building has been properly closed and driedin.Gypsum panel prod

17、ucts shall be stacked flat, rather than onend or edge. Gypsum panel products stacked on end or edgecan be unstable and present a serious hazard in the workplaceshould they accidentally topple. Refer to Handling and Stor-age of Gypsum Panel Products, GA-801, for proper storageand handling requirement

18、s.GYPSUM AREA SEPARATIONFIREWALLS620-2011 201012 Final:216-07.qxd 12/3/2010 8:42 AM Page 3ComponentsGypsum Area Separation Firewalls consist of steel H-studs,steel C-runner, two layers of 1” (25.4 mm) thick gypsumshaftliner panels, and aluminum angle clips. (Figs. 2 and 3)CuttingGypsum panel product

19、s shall be cut either by scoring andbreaking, working from the face side; or by sawing, workingfrom the face side when using a hand saw. When scoring, asharp knife shall be used to cut through the facer and into thecore. The gypsum panel product shall then be snapped backaway from the cut face. The

20、back of the panel shall be cut orshall be broken by snapping the gypsum panel product in thereverse direction.InstallationIn general, Gypsum Area Separation Firewalls are installedprogressively beginning at one end and working toward theother. They are generally installed either a) from the founda-t

21、ion floor (slab) to or through the roof deck or b) from theabove grade top of masonry or concrete footings to or throughthe roof deck. The Gypsum Area Separation Firewalls areinstalled one course (or floor) at a time with succeedingcourses stacked on top of the preceding course.1. Align the 2” (51 m

22、m) C-runner that will serve as thefloor track of the Gypsum Area Separation Firewall sothat the completed wall will be positioned not less than” (19 mm) from the framed walls of the units being sep-arated. As an alternate to the ” (19 mm) air space thesteel components are permitted to be covered wit

23、h either(a) 6” (150 mm) wide batten strips of ” (12.7 mm) gyp-sum panel screw attached to the framing with 1” (25 mm)Type S drywall screws or (b) 1” (25 mm) mineral fiberinsulation.2. Space ends of adjacent sections of C-runner a mini-mum of ” (6 mm) apart. (Fig 4)3. Attach the 2“ (51 mm) C-runner t

24、o the foundation flooror to the top of the footing with power-driven fastenersspaced 24“ (610 mm) o.c. and apply acoustical sealantalong edges of C-runner to seal the juncture between theC-runner and foundation or footing.4. Install a vertical C-runner to the wall at one end of theGypsum Area Separa

25、tion Firewall where the wall abutseither a foundation wall or an exterior wall.5. Begin erecting the Gypsum Area Separation Firewallby inserting two thicknesses of 1“ (25.4 mm) gypsumshaftliner panel vertically into the floor and vertical C-runner. Shaftliner panels and studs may be installed either

26、from the basement floor or fed down from the floor abovethrough the space between the wood framing.6. Make sure the first two shaftliner panels are seated allthe way into the floor and vertical C-runners and thattheir edges are flush, insert an H-stud into the floor run-ner and engage the H-stud leg

27、s over the long edges of theshaftliner panels. Seat the H-stud fully so the panel edgescontact the stud web. Attach each leg of the vertical C-runner to the floor C-runner with one 3/8” (10 mm) TypeS pan head screw. Install the vertical C-runner, H-studs,and shaftliner panels to not more than 24” (6

28、10 mm)above the floor line of the floor above.7. Continue in this manner, progressively erecting twothicknesses of full-width shaftliner panels followed by anH-stud until the first course of the wall is completed towithin 24” (610 mm) of the end point of the wall. Cut thefinal two shaftliner panels

29、to the necessary width andinstall them in the floor runner. Use a vertical 2” (51 mm)C-runner to finish the end of the wall. Make sure all4 GA-620-2011620-2011 201012 Final:216-07.qxd 12/3/2010 8:42 AM Page 4studs, C-runner, and shaftliner panels are tightly nestedand attach the H-studs and the vert

30、ical C-runner to thefloor runner on alternate sides with 3/8” (10 mm) Type Span head screws.8. If the Gypsum Area Separation Firewall terminates atan existing or previously constructed foundation wall orexterior wall, the last two shaftliner panels will need to beinserted from the floor above into t

31、he channel formed bythe final H-stud and the vertical C-runner before attach-ing the vertical C-runner to the floor runner.9. Install a 2“ (51 mm) C-runner (legs down) over the topof the studs and shaftliner panels to cap off the wall.10. Secure one aluminum clip to each side of every H-stud (two pe

32、r stud) with one 3/8“ (10 mm) Type S panhead screw through the short leg of the clip. Secure thelong leg of the clip to wood framing with one 1 1/4“ (32mm) Type W screw.11. The recommended point of attachment of the alu-minum clips to the wood framing varies. Refer to thegypsum shaftliner manufactur

33、er for specific attachmentlocation details. 12. When the total height of the Gypsum Area SeparationFirewall exceeds 23 (7000 mm) but not more than 44(13 400 mm), the vertical spacing between rows of alu-minum clips shall not exceed 5 (1500 mm) o.c. for thelower 23 (7000 mm) and 10 (3000 mm) o.c. for

34、 the por-tion above 23 (7000 mm). Note: Refer to manufacturers installation instructions forspecific limiting heights and clip spacing requirements forwalls exceeding 44 (13 400 mm) in total height.13. Begin the next course of the Gypsum Area SeparationFirewall by attaching a 2“ (51 mm) C-runner (wi

35、th legsup) to the previously installed top C-runner of the lowercourse. This back-to-back C-runner installation allowsfor the progressive erection of the Gypsum Area Separa-tion Firewall one floor at a time. Secure the two C-run-ners together with two 3/8“ (10 mm) Type S pan headscrews 24“ (610 mm)

36、o.c. Stagger back-to-back C-runnerjoints a minimum of 12“ (300 mm).NoTe: Always use back-to-back C-runners between courses inGypsum Area Separation Firewalls. Do not substitute a singleH-stud for the specified back-to-back C-runners.14. erect shaftliner panels and H-studs in the same man-ner as for

37、the first section of wall, except that starting andending procedures may vary depending on the exteriorwall intersection detail.15. At roof intersection the walls are capped-off with C-runners.16. Install code approved fire blocking on both sides ofthe Gypsum Area Separation Firewall at each floor.1

38、7. At top floor, the Gypsum Area Separation Firewallmay either extend to the top of a parapet wall or terminateat the underside of the roof deck.Limitations and Special ConditionsGypsum Area Separation Firewalls are specificallydesigned to be 2-hour walls separating townhouses. Theyare not intended

39、to be used for shear walls.Gypsum Area Separation Firewalls are designed to belaterally supported with aluminum clips spaced at speci-fied intervals. Consult the manufacturer for specific clipplacement and maximum allowable wall heights.Penetrations and openings are not permitted in GypsumArea Separ

40、ation Firewalls.Do not install insulation in the wall system until thebuilding has been properly closed or dried in.The exterior side of Gypsum Area Separation Firewalls,including offsets, parapets, and wall extensions (wingwalls), must be protected by appropriate weather resistantmaterials.Gypsum p

41、anel products shall not be used where therewill be direct exposure to water or continuous highhumidity conditions. Gypsum panel products shall not beinstalled in direct contact with concrete, masonry, orother materials that have high moisture content.Gypsum panel products shall not be used where the

42、ywill be exposed to sustained temperatures of more than125F (52C) for extended periods of time.5GA-620-2011620-2011 201012 Final:216-07.qxd 12/3/2010 8:42 AM Page 56 GA-620-2011620-2011 201012 Final:216-07.qxd 12/3/2010 8:42 AM Page 67GA-620-2011620-2011 201012 Final:216-07.qxd 12/3/2010 8:42 AM Pag

43、e 7GYPSUM ASSOCIATION MEMBERSHIP 2011AMERICAN GYPSUM COMPANY LLCCERTAINTEED GYPSUM, INC.CERTAINTEED GYPSUM CANADA, INC.CGC INC.GEORGIA-PACIFIC GYPSUM LLCLAFARGE NORTH AMERICA INC.NATIONAL GYPSUM COMPANYPABCO GYPSUMa division of PABCO building products, LLCTEMPLE-INLANDUNITED STATES GYPSUM COMPANY620-2011 201012 Final:216-07.qxd 12/3/2010 8:42 AM Page 89GA-620-2011620-2011 201012 Final:216-07.qxd 12/3/2010 8:42 AM Page 9