10315 19TH AVE SE BASE FILE 2016-01-01 MF Import

,/ ( llgure 2 L8t8►8I FO�CB BI'BCIIfQ�17puies 2 end 3) Leteral toroe Brecing • Ct:�ngs corstructed of lath and plaster a gypsum board,screw a nail at- tached to suspended membe�s that support a ceiling on ono level extending �e e,w. . ��a, lrom wall to wall shell be exempt 6om the lalerel Iwce bracing requirements. \ � SourceGSGza�res3�4 i � • Lateral force bracing Is the use ol verticel siruts(canpression posts)and — �p BOBe splay wires(see fgure 2). f ¢ layetl 's•^��•••y � e�•�= • Leteral Iorce bracing is required lor ceilings over 1,000 square feet and not ,6•orim wlres required for ceilings less than 1,000 square feet provided they are surrounded by four walls and braced to structure.s«aco asce�-02 socurn s.c z.s2z nm�c —c�o�,i„ Nnin hoem— � • Luteral Force Bracing shall be 12 feet on cenler(ma�cimum)and begin no farther than 6 feet Irom walls,swme asca s�rsrrycx�os a.a • Splay wires ere to be four 12 gaga wires ettached to the mein beam.Wires are anayed 90°(rom each other and at an angle not ezcec�ding 45°from thz plane of the ceiling.sow�cisca sa.v„�c mnos+-e • Splay wires are fo be withln 2lnches of ihe connec,:on ol the verticai strut to suspended ceiling.s�nce Gsca so�sMczo�e:s�e ��9��3 • Rigid bracing may be used in liou of splay wires.sa,roansceso�nr,��az.c.z.z Mazimum Recommended Lenglhs lar Verlical Siruts • Ceilings with plenums less than 12 inches to strucWre are not requirod to have laterel torce brncing.s«,.rortvau�deuaa�,�yrxne,m,n,• • Vertical struts must bo positivoly ettached to the suspension systems and ihe � � structure above.s��.co ascn a�e 'h'EMT conduit up to 6'0' • The vertical strut may be EMT conduk,metal studs or a proprietary compres- � sion post(soe figure 3J. �i'EMT co�duit up to 8'6' reMrconduit uPtoio�o• WaIlMoldings�ry,,,�al • � • Wall moldings(perimeter closure angles)ara requ!red lo have a hor¢ontal 7%"metel slud(25 gage) up to 6'2' �ange 2 inches wide,unless alternato methods aro approved prlor�to instal- lalion by the local building depariment and ihe designer of record.One end 2'h'motal stud(25 gape) up to 10'6" of tho ceiling grid shall bo atlached to the wall molding,the other end shall Sc1✓co!}rlWntl Buildin�Dpp�rmienf have a�4 Inch clearance from the wall and free to slide.sn,�co asr.F�-n�se��;w 9.6.:!.62.2 iltrri b Note:Plenum areas greater than 11'0"will require � The grid shall be atteched at two adjacent wall;(pop rivets or approved engineering celcula�lons. method).Sance Ciscq sav�eczanua s�o • There shall be a minimum�'i inch dearance from ihe end of the grid system at un-attached walls.sa,��a asce�-oz scnnn„2e2.c.az u�� Spreader Bars�ro�,oa� • Spreader(specer)bars a other means approved by local building depart- �gure 4 ment shall�used to prevent the ends of the main beams at perimeter walls Wall Molding Requlremants trom spreading open during a seismlc ovent.Penmeter wires shall not be in lieu of spreader bars.cou�ce c�scn ses�,�c m„es s a �� mm • Wve tying fs an ecceptaWe alternat've to spreader bars. "'�` • Spreader bars are not required if a 90 degrae Intersecting cross a main is . within 8 Inches of ihe perimeter wall. 0 `o w..a�s«e 0 0� ��. u�.�w n:vn��.m..a�u `^°°�'�'• Hanger(Suspenslon)1Nireslre�re:sa��dsb1 ��,�,� � L� I�Mn' \ Wx6pW✓1 "'°tlin"" / "'"""""°""' ��4 tl, • !'�^yer and perimeter wires must be plumb within 1 in 6 unless(figure 5a) r po�.,�� ,. cuunter sloping v�ires ure providad(figure 5b).sou.co nstne c u7e s�tic�a�z.i,q `a . • Hanger wires shall be 12 gage and spaced 4(eet on center or 10 gage spaced 5 feet on centec sa,rco nsn,r c rac • My connection device at Ihe supporting construction shall be capable of car• rying not less then 100 pounds.salm.e cisca mnes a.a NOPTHWESi WALL M1 CEiLING AUREAU• SUSPENSION SYSTEMS i0R ACOU3TICAL LAKIN CEILIN�S � �'�3