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I <br /> r <br /> � REPORT OF GEOTECHNICAL INVESTICATION AND CONSLILTATION ' <br /> 1 PROPOSED EXPANSION OF BUILDING 40-56 I <br /> r EVERE7T, N'ASHINGTON <br /> � <br /> r INTRODUCTION <br /> I_. <br /> 'fhie report presents the results of our geotechnical investigation end consultetion for the <br /> �^ proposed expension of Building 40-56 in Everett, H'ashington. The expansion is to be Iocated <br /> I on the north end oC the existing building,as shown in Plate I of this report. 7'he report describes <br /> the field investigation and leboratory !rsting programs, the nuture of the proposed project, the <br /> scope of analysis conducted and our recommendations for foundation support snd construction. <br /> r <br /> � PROPOSED CONSTRUCTION <br /> We understand from discussions with you end with the structural engineers for the project, <br /> John Grahec� Associates of Seattie, that the existing Building 40-56 is to be extended !00 feet <br /> �, norhward over the full length of the building. The eatension is to be a steel strucmre with , <br /> column spacing ranging from 25 feet to 50 feet. The south culumn line of the extension is to be <br /> located immediately edjacent the north wall of the existing structure. Column loads on this south <br /> �_ line are expected to be 172 at most locations. Column loads wiil be epproximately 615 kips for <br /> the central(eest-west)column line end epproxi�nately 345 kips for the north column line in the <br /> extension. <br /> Floor loads in the praposed eatension are expected to be on the order of 2,000 pounds per <br /> aquare foot (psf) for limited ereas. The full velue of floor load mey be imposed over en area ; <br /> approximately 60 feet by 70 feet in dimension. The location of this loaded area may chenge i <br /> during the life of the building. A tunnel Cor pedestrian traffic is to be located IS feet below <br /> the finished floor grade between the southern and centrei column lines in the extension. 7'he <br /> _ tunnel is ro have en overall width of 20 feet and will extend the entire length of the building. I <br /> The wells, floor and roof of the tunnel are to consist of reinCorced concrete nt least 18 inches i <br /> �j thick. The 2,000 psf floor loed described above wiil likely be positioned over some portions of � <br /> �� the tunneL � <br /> r The south column line of the proposed extension will be loceted approximately 6 feet norlh <br /> I!� of the column Iine for the existing building. 'fhe existing columns have been supported on <br /> caissons (drilled piers) that eppear to be embedded at least 4 feet into a glaciel till bearing <br /> stratum. <br /> L <br /> L <br /> , <br /> t. <br />� �amos 8 Moore <br />