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Sound GA-225-2019 `�j�'-GYPSUM REPAIR OF FIRE-RATED GYPSUM PANEL PRODUCT SYSTEMS A*Y'%a`Z� SCI ASSOCIATION NIAD1wA99002 'FRE:(7062 521-1686 Mk(22.1)959-HOOP GA-225-2019111. P S:'ll`• REPAIR OF FIRE-RATED - fit. EFAnE GYPSUM PANEL PRODUCT SYSTEMS ,`. t,_, A[O-t LRn.c:ant6Y6mf IR,lS ,�w r '''1,-‘44o,_ r IPRIN%AEMS Fire-rated gypsum panel product systems may be damaged during the life cycle of buildings.To maintain the b'1tc Yntm,lttifl. Pct required fire-rated separation between occupancies or areas,damaged systems must be repaired so that they _ FD 9P1..MAI.OE are restored to their original fire-resistive condition.The repair procedures should be dictated by the severity of MLPEPT'R hE ENGNtE'.. N7PMa1Pfa 91/12: the damage. ffm taYW CCM. Small holes(such as those caused bye doorknob)can be repaired by patching(see Figure 1).To maintain the ro+ ItO Ol7Ck Integrity of the surface membrane,a gypsum panel product patch must be mechanically secured to blocking in GEAP.g7 fi01FfP5 - the opening,attachment with joint compound material only Is not acceptable.The patching material should be -� SELD.RCt Pyfly cut from type X or proprietary type%gypsum panel product of a thickness equal to the original panel so that the Figure 1:Damaged Gypsum Panel Figure 2:Square Off Damaged Area OREOkCEk%Ah1'NOY lE PI00WRIEh patch Is In the same geometric shape as,but slightly larger than,the damaged area.The damaged area Is then CRS:M(I AGM) further enlarged to match exactly the size of the patch(see Figure 2).Use caution when cutting or fastening Into a MP?RDA1E stud cavities to avoid electrical shack or causing water leaks.Insulation,if present,must be restored.Metal , , •t CON'ENvaiR,cove runner track Is secured to the edges of the frame opening(see Figure 3).The patch Is screw-attached to the - g9 - - "°,'tA"' E•YNfg.lsIkCRdKi exposed face of the runner track with fasteners a maximum of 8 In.(200 mm)on center(see Figure 4).The , MP It/UPI(9N.. patch should be treated with tape and joint compound to restore appearance,fire-resistance qualities,and CGIEIIII.R Ewff.0 E K1ft"iOFE%f1EOt acoustical performance(see Figures 5 and 6). MAXIMA NOTE:Overlapping of joint tape can result in finishing problems. Proprietary clip products are available that provide mechanical support for patching.Manufacturers of these --s " products should be contacted for Information. If damage covers more than 100 in..(700 cm')In 100 ft'(10 m')of wall or ceiling area,all materials in the 9 damaged area must be removed back to the original framing to make the repair.Framing in the area to be repaired should be Inspected and replaced If necessary without increasing original framing spacing. Figure 3:Frame Opening Figure 4:Apply Gypsum Panel Patch Replacement panels should be cut to fill the opening and mechanically attached to the framing.Ends and edges of the panel that are not backed by framing materials should be supported with metal runner track.The repaired area should be finished with tape and joint treatment compound as necessary. -r $. Multiple-layer systems typically require that joints be staggered between layers.Proper repair of multiple-layer 'e _- systems requires that face layers of panels be removed beyond the base layer joint to retain the staggered loin - feature. ' ssz To improve the appearance of large areas that are structurally sound but aesthetically unacceptable.a new layer - EA of regular or type • s g gypsum panel may installed with mechanical fasteners without adversely affecting the • _ fl fire-resistance rating or acoustical performance. - sal e svQ Figure 5:Tape and Finish Patched Area Figure 6:Redecorate Repaired Area 0 p Pointed In U.S.A. GYPSUM ASSOCIATION Copyright°Gypsum usmtla0pn 2019. Printed In U.S.A. GYPSUM ASSOCIATION Copyright°Gypsum Association 2019. S. na 962 Wayne Avenue,Suite 620 All rights reserved. 962 Wayne Avenue,Suite 620 All rights resented. Silver Spnng,MD 20910 Silver Spring,MD 20910 301-277-8686 301-277.8686 WWW avasum on/ 1 2 www evosum Orq Gypsum Association GA-600-2015 FIRE RESISTANCE DESIGN klANUAUGA Fie No.WP3510 DLA N0.nr oxroj cfffyIC1 1 IIOUB I To39 en SIC GA i Ftp 9 1 niPSUg WN i mum.'A1200 STy= ONE LAYER 5/8'WE x onis or ays OR GYP91N,rimalto.c Diff IP%1D)PAUUM `/.."' m _ - OR AT MGM ANGLES 10 E'L SIDE.m say NOM STUDS 24'O.C.KIN as COATED HAAS, X 1-7/a'LONG.O.WS'www.1/4'NEWSY 0.G JOINTS STIGCOED 24'ON sePa91E 9pE5,;Lwv.uucncui /w/[�A tom/ n p ptOOESS 4-7/r' lir of ize,64 v4„LE./ APPROX.r6xx0 7p/ j FRE TESL SmaP1510 LA R350t-47,-4B.e-17-B5, u wm, E. G a ra 9 G4LL lir, La.R° 'a 7-22-70,- (...Yg SOUND TEST: !%Z 2 _ tv5°5wuNrey (4 DCr'ti / CITY OF EVERETT $ " REVIEWED FOR PERMIT ..4 ;K�t. � 51� "41.31(31.4P."'�� -� 09/08/19 q �'`