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1 <br /> Project Description <br /> This project consists of the repair and reconstruction of nine(9)staircases located at an <br /> existing apartment complex in Everett,WA.The apartment complex consists of(6)2-story or 3- <br /> story tall buildings.The staircases connect to exterior walkways used to access the apartment <br /> units.The staircases are located between buildings or at the ends of the buildings.The <br /> replacement stairs will consist of concrete spread footings,timber framing,and precast <br /> concrete stair treads and intermediate landings.The railings and their attachments will be <br /> premanufactured and designed by others.The existing foundation,landings,and roof framing <br /> will remain where possible.Kickers will be utilized to provide lateral resistance where required. <br /> ' This project also includes the design of a new access ramp to the 1-story main office building at <br /> the apartment complex.The ramp will utilize similar wood framing and concrete landings,and <br /> will utilize cross bracing for lateral resistance. <br /> Scope of Work <br /> We will provide stamped structural calculations suitable for permit and construction.We will <br /> redline the architectural plans and details,and provide framing information and structural <br /> details as required. <br /> 1 <br /> Basis of Design <br /> Roof Dead 10 psf <br /> Snow 25 psf <br /> 1 Stairs Dead(Exist) 10 psf <br /> Dead(New) 32 psf (concrete treads) <br /> Dead(New) 38 psf (concrete landing) <br /> Live 100 psf <br /> Seismic Parameters <br /> V=Wp*[Sds/(R/le)]=Sds/(1.5/1)=Cs*Wp <br /> Sds 0.811 <br /> Importance Factor,le 1 (Non-Essential Facility) <br /> Wp=Seismic Dead Weight of Stucture <br /> I <br /> Description By Date <br /> ERH 10f22/2021 <br /> Project Summary Checked Date <br /> ENGINEERING Scale NTS Sheet No. <br /> 250 4th Ave South Project Job No. <br /> Suite 200 River's Landing Apartments 21322.10 <br /> Edmonds,WA 98020 <br /> I <br />