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• <br /> ` BRADLEY ENGINEERING, INC. <br /> 811 Yew St. <br /> Bellingham, WA 98229 <br /> Ph. 360-752-5795 DJI ©1EIIV1 <br /> August 6d', 2021 <br /> City of Everett AUG11Z021 <br /> Permit Services CITY QF EVERETT <br /> 3200 Cedar Street P�1'►1'llt Se1'y�CgS <br /> Everett, WA 98201 <br /> Re: M2107-048, First Building Review Response Letter <br /> 2818 Hoyt Avenue <br /> Everett, WA <br /> Dear Mr. Martin, <br /> Please use following response letter to your comments, dated July 22"d, 2021, for supplemental <br /> review of the revised plans. The response comments are in red for clarity. <br /> 1. The project involves structural modifications to the existing roof. A separate building permit <br /> application is required including revised structural drawings and calculations. Additional <br /> comments may be pending. The following preliminary comments should be addressed: <br /> a. Opening locations on Sheet S1 do not appear consistent with the mechanical plans, notably <br /> for the MUA duct. The locations should be revised as needed. See IBC Section 107.2.1. <br /> Structural and mechanical plans have been coordinated and the duct openings (specifically for <br /> the MUA duct) is now consistent between the mechanical plans and structural plans. <br /> b. The structural calculations evaluating the roof trusses do not appear to be included and should <br /> be submitted for review. See IBC Sections 1604.1 and 1604.4. <br /> Bradley Engineering,Inc. has decided to revise the structural plan to support the (2) new <br /> hoods as well as roof mounted exhaust fan and MUA fan entirely independent of the existing <br /> roof system. Thus, an analysis doesn't need to be performed on the existing roof trusses. <br /> c. The design loads considered in the structural calculations are not clear. The load schedule in <br /> the calculations appear to include deck and floor loads, which is not applicable, and no snow <br /> loading. The applicable loads should be dead (i.e., self-weight and mechanical equipment, <br /> including the hoods below) and snow loading. Revised calculations should be submitted for <br /> review. See IMC Sections 1603.1 and 1605. <br /> Please see the attached revised calculations for clarity. However, the structural design has <br /> been amended, thus the calculations are different. <br /> All the applicable loads on the structural members are dead loads solely from the new HVAC <br /> equipment or point loads being transferred from a beam supporting new HVAC equipment to <br /> the beam carrying the respective beam and spanning bearing wall to bearing wall. New <br /> structural members are entirely independent of the existing structural roof system, thus typical <br /> roof loads were not considered. <br /> 2. Sheet M-1 states that the Type I hood is constructed to allow a zero-clearance installation. The <br /> equipment sections on CaptiveAire Sheet 2 show insulation on the top and back, but the plan view <br /> does not indicate insulation is provided on the sides. Sheet 2 should be revised to show insulation <br /> on the sides, or the 18-inch clearance must be provided. See IMC Section 507.2.6. <br /> Per NFPA 96, hood surfaces perpendicular to combustible wall or structures do not need to be <br /> insulated to maintain the zero-inch clearance rating. Only the surface of the hood against a <br /> 1 J3 <br />