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, <br /> l � . • <br /> 1601 Fifth Avenue,Suite 1600 Seattle,WA 98101 206.622.5822 kpff.com igHef <br /> October 09, 2018 <br /> Mr. Larry Daubenmire <br /> Community Transit <br /> 2300 Kasch Park Road <br /> Everett, WA 98204 <br /> Subject: Community Transit Kasch Park, Bldg C— Everett, WA <br /> Condition Assessment Report of Existing Roof Structure on North Side <br /> Dear Larry: <br /> On September 12, 2018, KPFF performed a site visit to evaluate the condition of the existing <br /> exterior shed roof on the south end of Building C at the Kasch Park Operating Base in Everett, <br /> WA (Photo 1). Additionally, we were requested to provide an engineering opinion on the ability <br /> of the existing roof to support new loads. New material loading is described in the evaluation <br /> report by Wetherholt and Associates, Inc., dated February 14, 2017. <br /> During our site visit, the roof area was observed from ground level and also from atop the roof, <br /> made available by a man-lift which was operated by Community Transit personnel. <br /> HISTORY <br /> Kasch Park Building C is a one-story concrete tilt-up building with a mezzanine on the south <br /> side. Records indicate that the building was originally constructed approximately in 1985. <br /> There was a major remodel in 2010. Drawings of the original building and the 2010 remodel <br /> were made available for our review. <br /> The north side of the existing shed roof is supported by concrete tilt-up panels at mid-height <br /> of the primary building. Additional concrete panels support the south side of this shed roof. <br /> The east and west sides are open to allow for vehicular access. The shed roof is <br /> constructed of 1.5-inch deep galvanized steel decking and steel Z-purlins spaced <br /> approximately 6 feet on-center. The Z-purlins are supported by steel channel girder beams. <br /> The roof slopes down to the south to a continuous gutter. No structural improvements were <br /> made to the existing roof deck, support framing or wall panels during the 2010 remodel. <br /> An evaluation report by Wetherholt and Associates, Inc., dated February 14, 2017, was <br /> provided for our review. Based on site observations of the shed roof, this previous report <br /> cited surface corrosion of the galvanized decking and gutter system. Also, the report <br /> included recommendations for a roof repair which included the installation of a new ply roof <br /> overlay, consisting of a mechanically attached coverboard and a fully adhered PVC or KEE <br /> single ply roof. <br />