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13227 Melvin Arnold Rd <br /> Raleigh NC 27613 <br /> DIEL C. SMITH, PE ext 1 F 877- 1-6 <br /> P 919-844-6050 84 050 <br /> Consulting Engineers <br /> lowes@dansmithpe.com <br /> January 22,2019 <br /> Project: 18-D-0128 WA LeAnn Haggard <br /> Subject: Seismic Calculations for Wood Posts&Joists <br /> Code: 2015 International Building Code <br /> Introduction: <br /> This calculation does not apply to decks that exceed 35'-0" <br /> This calculation assumes the minimum force=5%of W=(5%*1640=82) <br /> The deck seismic loads are found by taking the deck area(164 sqft)and multiplying by the dead load <br /> of the deck plus any high weight deck covers-concrete or stone(10+0 psf)to determine: <br /> W= 16401bs <br /> The maximum deck height will also be used to calculate any additional loads generated by the <br /> seismic conditions. <br /> Deck Height= 8 ft <br /> Seismic Parameters: <br /> Ss= 1.284 (found using hazards.atcounciLorg based on 98201 zip code) <br /> S1= 0.488 (found using hazards.atcouncii.org based on 98201 zip code) <br /> Fa= 1 (from ASCE, conservative value) <br /> Fm= 1.5 (based on Site D) <br /> Sms= 1.284 (found using hazards.atcouncii.org based on 98201 zip code) <br /> Sm1= 0.732 (found using hazards.atcouncil.org based on 98201 zip code) <br /> Sds= 0.856 (Sms *(2/3)) <br /> Sd1= 0.488 (Smi *(2/3)) <br /> Seismic Importance Factor= 1 <br /> To determine the Seismic Design Category(SDC)we use the following evaluation: <br /> Sds<.167 A <br /> .167<SDS<=.33 BF f ' �l " sa }7 <br /> .33<Sds<=.5 C <br /> .5<Sds DJAN 2 5 2012 1.) <br /> Based on this evaluation this is a Seismic Design Category DI <br /> CITY <br /> EVER <br /> Permit S.13r1, � <br /> // <br /> 18-D-0128 WA LeAnn Haggard TAKEOFF v5.5.xlsx ���' <br />