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^FIELD TECHNICAL INFORMATION <br />Aiiplic tion recomrrreridsdaris for woik of the w9Y or*llinp . <br />Suspension Systems for Acoustical Lay -in Ceilings <br />Seismic Design Categories D, E & F <br />This document has boon revised <br />based on cument Building Code <br />.standards, In all buildings, other tha <br />structures classified, as essential <br />facilities, suspended.celangs insW <br />in alceordence with the presariptk <br />provisions of the 461 document an <br />deemed to•compy with the curnelr <br />buddik g code Interpretation. <br />This document provides the IBC-201 <br />referenced standards for the <br />installation of suspension. systems <br />for acoustical layAn:ceilings. . <br />Incorporation of this document will <br />provide a more uniform standard <br />for installation and inspection. This <br />document Is designed to accomplish <br />the intent of the International <br />Building Code (100) with regard <br />to the requirements for seismic <br />design category,D; E-and F for. . <br />suspended ceiGrtgs and related items. <br />Unless supported by engineering, <br />.the SuSpension system shall be <br />installed per these requirements. <br />Manufacturers' recommendations <br />should be followed where: applicable. <br />General Recommendations <br />• Referenced sources per hierarchy., 2009 iBC (international Building Code), <br />American Society of Testing Materials (ASTM C 636, ASTM C 636, ASTM <br />E 580/E 580M), American Society of Civil Engineers (ASCE 7-05) and Cell- <br />in85 and Interior Systems Construction Association (CISCA). <br />• Partitions that are tied to the ceiling and all partitions greater than 6 feet in <br />height shall be laterally braced to the structure. Bracing shall be indepen- <br />dent of the ceiling splay bracing system. Source: ASCE 7-05 nection 13.b.n. I <br />• For further information on bracing of non -load bearing partitions refer to <br />NWCB technical document *200-501. <br />• All main beams are to be Heavy Duty (HD). S0trrCr.: ASCE 7-05 sactian 115,022 a <br />• All cross tees shall be capable of carrying the design load without exceed- <br />ing deflection equal to 1M60 of its span. Suurry GlArA rgne, S-4 <br />• These recommendations are intended <br />for suspended callings including grid, <br />panel or tile, light fixtures and air <br />terminals weighing no more the 4 lbs. <br />per square foot. Sourco: ASCE 7-06 srction <br />a 13,5.(i.1 <br />m•xl+rium T <br />(76mm) • All wire ties are to be three tight turns <br />around itself within three Inches. Twelve <br />gage Hanger wire spaced 4 foot on cen- <br />ter (figure 1). Srnjrr_r: ASII'M C 835 ilea, 2,3A <br />n • Changes in ceiling planes will require <br />positive bracing. <br />figure 7 Suuma' ASCE 7-05 13.5.6.7..21 <br />.••• NORTHWEST wAL.I. & CEILING BUREALL.... .. <br />( OZ00/CT00 <br />SUSPCNSION SYSTEMS FOR ACOUSTICAL LAY -IN CEILINGS <br />XV;Sa00Aff1TXVUTqVS ZTe6V96C9Z XVd Rd LT:C TTOZ/ST/TT <br />