2822 HOYT AVE 2018-01-02 MF Import

EDWIN F. BAKER, P.E. BAKER ENGINEERS STRUCTURAL DESIGN P.O. BOX 1697 LYNNWOOD. WA 98046-1697 June 16, 1993 Chuck Griffiss 1121 South Davies Road Lake Stevens, Washington 98258 Reference: Building Rehabilitation 2818 5 2822 Hoyt Avenue Everett, Washington Job No. 00.93.037 Gentlemen: In respunse to your request we have observed the soil settlement problem at 2818 and 2822 Hoyt Avenue, Everett, Washington for the purpose of proposing a structural rehabilitation for the buildings located on the properties. Our proposal which follows is based on a site visit and on drawings, reports and comments by others. It should be tual il conditions may note be asred rassumed rfor athe `purpose oflthis repording or t. It is our understanding that the buildings at 2818 and 2822 Hoyt Avenue are to be reduced in size by removal of portions 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 settlement of soil at the westerly portion of the lots and the uncertain structural integrity of the railroad tunnel directly beneath the property 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 we have assumed the longitudinal centerline of the tunnel is approximately directly 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 method that accurately locates the tunnel. We propose a concrete grade beam be installed beneath the common wall of the two buildings along with two other adjacent and parallel grade beams. These beams, approximately 18" X 48" 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 beams would be supported by a concrete girder approximately 18" X 60" in cross section that distributes the load to its reactions consisting of drilled auger cast piles or piers as recommended by a Geotechnical Engineer. We anticipate the piles to be battered approximately 1:10 and of sufficient lenght; approxiamtely 60', to deliver their axial load of approximately 100 kips to the soil below the tunnel base. 6628 212TH S.W. ' LYNNWOOD 98036 • (206) 771.6666