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• <br /> Bruce S. MacVeigh, P.E. <br /> Civil Engineer/Small Site Geotechnical <br /> 14245 59th Ave. S. <br /> Tukwila, WA 98168 <br /> Cell Ph: 206-571-8794 <br /> September 16, 2019 <br /> Subject: Seismic Restraint- Two New Kitchen Hoods, Pizza Hut, 10121 <br /> Evergreen Way, Suite 23, Everett, WA 98204 <br /> General, <br /> The existing building will receive new/upgraded roof-mounted restaurant <br /> related units and two new interior kitchen hoods. The two new hoods, 11- <br /> foot wide and 3-foot wide, are supported internally by new post supported <br /> 4" x 8" cross overhead beams. Beam posting is to the tenant space side <br /> wall and a new interior front to back wall. The interior wall may be <br /> OSB/plywood sheathed for general lateral post stability. <br /> Comments/Evaluation Results. <br /> As noted, the beams supporting the hoods are tied-in directly to internal <br /> walls. While portions of the hoods are hung from suspending rods, they <br /> are also tied-in to their adjacent walls. <br /> Estimating seismic loading due to the dead weight of the hoods is as <br /> follows. The larger 11-foot hood had a weight of 619 pounds. Add 15 <br /> percent for miscellaneous ducting, etc. resulting in a weight of 712 <br /> pounds. For a reasonable estimate for the lateral seismic loading, use 20 <br /> percent of dead weight, or about 143 pounds. With wall restraint, the <br /> relevant loading is transverse to the hood location. <br /> Based on normal construction practice, the incidental normal wall <br /> connections provide more than the 143 pounds capacity. <br /> Summary. <br /> Normal hood wall connection, even minimal, is sufficient to provide <br /> adequate seismic restraint. No formal detailing isnecessary for this <br /> feature of hood installation. <br /> Note the smaller hood has the same evaluatio , 1 A e restraint <br /> conclusio s S.M.f,t, <br /> rifiti ce S. MacVeigh, P.E. 4 ,:�� <br /> r7 <br /> Civil Engineer- #18657 ! �z <br /> "6 <br /> robinsoneverettpizzahuthopdseismic/1962 / ���;. / �y, y^ <br /> E IRES; 4/24/77 <br />