Laserfiche WebLink
ESG DESK Eli Drassiey, P.E. <br /> _._...- --_ -- ---- -- _ ------- -- ---......-- <br /> 6) Roof sloping/drainage. <br /> Response: The proposed roof reconstruction project will involve installation of a "minimal/y sloped" <br /> membrane roofing surface which achieves the minimum required 4':•12"drainage slope via roofing <br /> contractor installation ofgraded sleeper strips as necessary. Refer to new Proposed Roof Plan drawing A5.1 <br /> and architectural detail 1/A5.1. <br /> 7) Bedroom 2 expansion. <br /> Response_- There is no expansion of Bedroom 2 occurring on this proposed roof reconstruction project. <br /> 8) Structural roof framing details. <br /> Response: Typical roof framing structural sections on sheet S-2 have been enhanced to include additional <br /> connection specifications as requested. <br /> 9) FOR stamp. <br /> Response: The submitted structural drawings 5-1 and S-2 have been stamped by a registered PE. <br /> 10) Existing building seismic analysis. <br /> Response: The only change in the structural material weight of the existing/proposed bui/ding is the <br /> replacement of the existing 2x continuous roof decking surface with proposed new 2x8 at 24 oc roof rafters <br /> and new!12"p ywood roof decking. This results in a net d crease in material weight of approximately 1.5 <br /> pounds/sgft. Thus it is the judgement of the Engineer of Record that no existing building seismic analysis is <br /> warranted for this project. <br /> Additional/y, it is the opinion of the project FOR that Existing Building Code section 502-Repairs, is the most <br /> applicable design standard for the proposed roof reconstruction project: A Repair is defined in section 202 <br /> as: "The restoration to good or sound condition of any part of an existing building for the purpose of its <br /> maintenance.' EBC section 606 contains no language specifying seismic analysis of an existing building <br /> undergoing repairs absent significant damage, but it does include an exception from analysis of lateral <br /> force-resisting elements in section 606.2.3.1, Exception 2("One and two-family dwellings need not be <br /> evaluated or rehabilitated for load combinations that include earthquake effects) finally,should this <br /> project not be deemed a 'repair"per the City of Everett, then certainly the project can be classified per EBC <br /> Chapter 7 section 701 as a Level 1 Alteration, defined as- "Level 1 alterations include the removal and <br /> replacement of the covering of existing materials, elements, equipment or fixtures using new materials, <br /> elements equipment or fixtures that serve the same purpose.' The pertinent building element being the <br /> replacement of the original flat roof. Chapter 706.2-Addition or Replacement of Roofing or Replacement <br /> of Equipment, Exception 2 contains the following structural analysis exception language "Structural <br /> elements where the additional dead load from the roofing or equipment does not increase the force in the <br /> element by more than 5 percent." It is the opinion of the FOR that all of the quoted language/fisted herein <br /> is applicable to the design of the submitted project. <br /> Please accept this letter, along with the resubmitted project drawings and associated documents, as the complete <br /> submittal for this building repair/construction project permit request. <br /> Regards, <br /> Eli S. Grassley, PE <br /> ESG Design <br /> L <br /> .._,......................._.,-_..__..___- - <br /> ENGINEERED STRUCTURES GLOBAL DESIGN varber's ResidFrice p_zg4 e=, <br />