2818 HOYT AVE 2018-01-01 MF Import

e EDWIN F. BAKEfl, P.E BAKER ENGINEERS STFiUCTURAL DESIGN P.O. BnX 76S7 LYNNWOOD, WA 9BOa6-1697 June 16, 1993 Chuck Griffiss 1121 South Davies Road Lake Stevens, Washington 98258 R2ference: 9uilding Rehabilitation 2818 S 2822 Hoyt Avenue Everett, Washington Job No. 00.93.087 Gentlemen: In response to your request we have observed the soil settlement problem at 281II and 2822 Hoyt Avenue, Everett, Washington for tne purpose of proposinq a structural rehabilitation for the buildings located on the properties. Our proposal which follows is based on a site visit aad on drawings, reports and comments by others. It conditi ns may note ba asrassumedrforathe purpose of t h s rePortil It is our understanding that the buildings at 2818 and 2822 ?ioYt Avenue are to be reduced in size by removal of portioas along their back ( westerly ) side. The building at 2818 Hoyt. is to become 30' by 60' and the building at 2822 Hoyt, 46' X 60' with their front and back side walls aligned. Due to the settlemert of soil at the westerly portion of the lots and the uncertain structural integrity of t'ze railroad tunnel directly beneath the pcoperty a grid system of beams and piers is proposed to reduce the loading on this area of the tunnel. In our preliminary study of the proposed work cae have assumed the longitudinal centerline of the tunnel is approximately directl.� below the common wall of the two buildings described. It is very important that the actual location of the tunnel in relation to the buildings be verified. We propose this be done by a surveyor using existing plans and by taking field measurements or by whatever other feasible meLhod that accurately locates the tunnel. We propose a concrete grade beam be installed beneath the common wa11 of the two buiidings along with two other adjacent and parallel grade beams. These beams, approximately 16" X 4II" and 12" X 36" in cross section respectively, would be supported within the interior of the buildings on spread footings. At the building west wall the grade baams would be supported by a concrete girder approximately 18" X 60" in cross section that distribute�' the load to its reactions consisting of drilled auger cast piles oc• pie!'s as recommended bf a Geotechnical Engineer. We anticipate the piies to be battered approximately 1:10 and of sufficient lenght, approxiamtely 60' to deliver their axial load of aoproximately 100 kips to the soil below the tunnel base. 6628 212TH S.W. • LYNNWOOD, WASHINGTON 98036 •(200) 771-6666 FACSIMILE (206) 771-u558