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( <br />POGG[MEYER <br />DESIGN GROUP <br />CONSULtING ENGMEERS <br />STRUCTURALINSPECTION <br />December 10, 2002 <br />Job Name: <br />Job Address: <br />PDG Job #: <br />Inspection Date: <br />Time: <br />Subway <br />902 N. Broadway <br />Everett, WA 98201 <br />2087 <br />12/9102 <br />10:00 AM <br />Present At Site: Steve Amdd, P.E., Slructural Engineer, Poggemeyer Dcsign Group <br />Dave LaCoursiere - owner <br />Scope of Inspectlon: <br />A structural inspection site visit was conducted on December 9, 2002, in response to a request <br />hom Dave Hunter (Nap management Inc.). The inspection was specifically focused on lhe roof <br />graviry support system. A new mechanical unit weighing 580 Ib. is to be added to the existing <br />roof structure. Refer to attached sketch "SK1" for IocaHon new mechanical unit. <br />Observatlona: <br />The existing roof spans NorthSouth witli trusses at 24" o.c. The trusses have a top chord slope <br />of approximately '/."/ft with the deepest part of the truss at the south end support. At the north <br />end of the building the trusses are supported by a glu�lam beam 3.125"x 22.5". This beam <br />spans 22' to columns at each end. <br />Recommendatlons: <br />The existing structural members are evaluated in the supplemental calculations. The glue-lam <br />beam is the only visible member that can be evaluated objecGvely. Its strength is evaluffied, <br />compared to the demands and found to be adequate. The new HVAC unit load will be distributed <br />to four of lhe exisHng roof trusses. This distribution of the load results in a 9% increase in the <br />truss shear and 4% increase in the truss moment. The truss shear and moment allowable <br />capacities are not easily obtained because of their custom fabrication. The columns supporting <br />the north beam are loaded 4°/a more than the existing condition. <br />Considering the small loads applied to the roof by the new HVAC unit and knowing the factor of <br />safety built into the code specified loads anu aii�wables, it is our opinion that it is acceptable to <br />place the new mechanical unit on the existing roof. <br />I'oGgcmcqCi Cc�dqn Cio,�o. Inc <br />512 Sixth Street South. Suite 202 <br />Kirkland. WA 98033 <br />_ �425� 827-5995 _ <br />Fax �425� 828-4850 <br />