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a <br /> Bellevue • Bethel! • Issaquah • Kenmore • Kirkland • Mercer Island • Sammamish • Snoqualmie • Woodinville - <br /> • CONSTRUCTION TIP SHEET 12 <br /> r«f . - Fire Protection of Horizontal Venting <br /> �llyBulldlngPer�n��t.cor�i <br /> October 2004 <br /> 2003 IBC <br /> Duct Below Rated Assembly <br /> >, <br /> uliri. <br /> NOTE: <br /> �' No penetration of rated assembly <br /> II it t®e tLli <br /> allowed. <br /> 17 ^ . . . . \ <br /> a) <br /> trE <br /> cN 0. 0 11 <br /> 0 <br /> Z ' Y Y <br /> Duct Through Joist Bay <br /> Line the joist bay with 5/8"type X <br /> gypsum wallboard on four sides of <br /> bay&ends. The number of layers <br /> of gypsum board to match the <br /> >, 19 II number of layers required for the <br /> E10 rated ceiling assembly. <br /> NOTE: <br /> Ill! 11 0 LI IP <br /> MI ill A This detail is for ventingwithin a <br /> -. single dwelling unit in spnnklered <br /> buildings only. <br /> Fire-resistive caulk at penetration <br /> Fire Dampers <br /> No fire damper is required <br /> w • Fl Rated Assembly <br /> a <br /> mE <br /> . ebk <br /> c(the I I At ductwork penetrations of rated <br /> II , ,� ceiling assembly, an approved <br /> Y����� automatic fire damper device rated <br /> --_.. for ceilings must be installed per <br /> maufacturer's listing. <br /> GENERAL INFORMATION: . <br /> • The intent of this tip sheet is to address the requirements of horizontal venting only in residential structures. For specific <br /> ,^ , questions not addressed here or requiring further clarification,please contact your local building department. <br /> i • Intended for heat,vent,cooling,and exhaust ducts only. '' <br /> . ''-eC€'t Goy net <br /> f, s <br />