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4. <br /> COMFORT "OA <br /> SYSTEMS <br /> Northwest <br /> Date: December 18, 2018 <br /> To: City of Everett <br /> r) 'f <br /> Public Works Department ` 4 tz vz,p, <br /> 3200 Cedar Street I if , <br /> Everett,WA 98201LI DEC <br /> �/ 2 w <br /> 1 <br /> 3 <br /> DCI Reviewer: Drew Martin, P.E.,S.E. (dmartin@everettwa.gov)p 'Ot c 3' <br /> Associate Engineer/Commercial Plans Examiner �rP�% °.•t <br /> Les <br /> Regarding: Plan Check Number M1810-038, First Review <br /> Project Name: Value Village, Replace Two (2) Packaged Rooftop HVAC Units <br /> Project Address: Value Village#1021 <br /> 6220 Evergreen Way <br /> Everett,WA 98203 <br /> Regarding our mechanical permit application for the above referenced project number M1810-038,the <br /> following review comments dated October 12,2018 were received by our office.The comments are <br /> repeated below followed with our response.The corresponding design modifications are shown in <br /> revision clouds on each drawing. <br /> The specific structural review comments were addressed in the attached structural engineer response <br /> letter.The updated rooftop unit structural anchorage/support design details and calculations are <br /> included with the attachment. Based on the structural investigation,the rooftop unit(RTU-1), has been <br /> relocated.The revised unit location is shown on the mechanical roof plan, drawing sheet M1.1. In <br /> addition to the RTU-1 revised location, minor drafting corrections were made on sheets M0.1, M0.2, <br /> M0.4 and M1.1. <br /> Review Comments Response <br /> 1. The new mechanical units weight 624 and 736 lbs 1. Please see the attached structural engineer <br /> per Sheet M0.4.The increased roof loading response letter. <br /> appears to exceed 5%of the original design load. It <br /> is presumed that the original roof live load did not <br /> exceed 20 psf.In addition,the record drawings do <br /> not appear to show the existing mechanical units, <br /> and therefore they do not contribute to the <br /> original design load.Calculations substantiating the <br /> capacity of the roof framing to support the units <br /> shall be submitted for review.The analysis loads <br /> shall be per the current code(e.g.,25 psf snow <br /> loading,etc.).See IEBC Section 807.4. [DM] <br /> Page 1 of 2 <br /> 18702 North Creek Pkwy,Ste 110 I Bothell,Washington 980111(425)883-9224 I www.comfortsystemsusanorthwest.com Quality People Building SolutionsTM <br />