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RICE Group, Inc. <br /> Consulting Engineers <br /> 19015 36th Ave. W. Suite A <br /> Lynnwood, WA 98036 <br /> (425) 774-3829 <br /> (425) 672-2084 (FAX) <br /> RICE <br /> Group , Inc. <br /> �j G71 —Q 2 <br /> February 15, 2008 <br /> Jeff Oaklief <br /> Johnson Architecture&Planning <br /> 2124 3rd Ave. Suite 200 <br /> Seattle, WA 98121 <br /> Subject: Library Place,Response to Permit Review Comments Dated 12/24/07 <br /> Jeff, <br /> Below are the responses to the comments made by the City of Everett: <br /> Comment &ID# <br /> 5) The mechanical plans show a majority of moisture exhaust ducts as `exposed'. For all <br /> other fans that penetrate fire resistive ceilings, ceiling radiation dampers(or an approved <br /> alternate) should be detailed on the plans. Section 716.6.2. <br /> All exhaust ducts from units are ducted continuously and independently to the outdoors. <br /> Exhaust ducts within units only serve individual units and do not communicate between <br /> dwellings. Under 716.6.1 Exception 2 of the 2006 IBC, the duct is able to penetrate three <br /> floors or less without a fire damper. On the fourth floor ceiling/roof penetrations must be <br /> protected with a fire damper at the ceiling membrane penetration to protect the <br /> horizontal assembly. Ceiling radiation dampers have been added to all cabinet exhaust <br /> fans on the fourth level. Dryer vent ducting shall have no fire damper through fire rated <br /> construction per section 504.2 of the 2006 IMC. Duct construction shall be per 603.4 of <br /> the IMC. See M1.1, M3.0, M3.1, M6.0, and M6.1. <br />