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Structural Design Sep <br /> tru£.tuf l D--xsi(03 Dmitriy Penzin, PE <br /> Is,, r,d ,� t,,o, )11%111 1111 (425)606-05 83 <br /> info@structuraldesignshop.com <br /> City of Everett <br /> ATTN: Rakeeb Khan,Residential Plans Examiner I EC E O VE <br /> PROJECT: Pimentel House Addition ..01 JI <br /> PROJECT# <br /> CITY OF EVERETT <br /> RE: Permit Servica S <br /> Response to Correction Notice#1 <br /> Dear Rakeeb, <br /> This letter is a response to structural comments provided by you for"Pimentel House Addition". The numbering <br /> below corresponds to the numbering in the correction notice: <br /> 1. Structural special inspections should be required for this project(post installed anchors). A <br /> statement on special inspections has not been provided and should be provided on the plans. <br /> The statement should include a table listing each type of special inspection and should specify <br /> the extent of each inspection (e.g., continuous, periodic) per IBC Section 1704.3.1. The table <br /> should indude special requirements for seismic and wind resisting systems as required by IBC <br /> Sections 1704.3.2 and 1704.3.3, respectively. See IBC Sections 107.1, 1704.2.3, 1.704.3,Table <br /> 1705.3 <br /> Response: <br /> Please refer to revised sheet S 1.1 for special inspection requirements. Special inspections are not required for <br /> wind and seismic resisting systems per exemptions 1705.11.1 and 1705.12.2 of IBC 2018. Fasteners spacing <br /> exceeds 4"o.c. <br /> 2. It is unclear if strengthening of the existing framing is required such that the framing is capable <br /> of supporting the proposed overframing with required design snow load. Please verify if <br /> strengthening is required. Please provide structural calculations and revise drawings if <br /> necessary. IBC 1604. <br /> Response: <br /> Additional weight from overframing is estimated to be: 1.6PSF(PLYWOOD)+ 1.7PSF(RAFTERS)=3.3 PSF. <br /> It is common practice to design roof for 15 psf dead load while the actual weight is close to 12 psf. Considering <br /> a moderate extent of overframing it is reasonable to ignore the additional weight. Snow load also provides few <br /> PSFs of additional capacity based on the fact that residential designers use 25 PSF for snow load instead of <br /> 0.7*Ce*Ct*Is*Pg=0.7*1.2*1.1*1*15 = 13.9 PSF per ASCE 7-16. <br /> Sincerely, „toy Pgk„ <br /> Dmitriy Penzin,PE 7 <br /> Structural Design Shop O, • <br /> 07/29/2021 ' <br /> EXP. 07/17/2022 `tONAL <br />