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• • <br /> • <br /> Mr. Larry Daubenmire <br /> Octobe 9, 2018 <br /> Page 3 j6 <br /> A new roof overlay would be composed of(3) primary components: <br /> 1. Insulation within the roof deck voids <br /> 2. A mechanically attached coverboard <br /> 3. A fully adhered PVC roof ply <br /> Based on our October 02, 2018,conversations with Mike Caniglia of Wetherhold, it is our <br /> understanding that the assembly weight of the three items mentioned would be less than 1.3 <br /> pounds per square foot, the maximum allowed weight as described above. <br /> If the preference is to install a new roof overlay, the existing roof deck should be cleaned <br /> with a mild-abrasive to remove any loose rust scales. Afterwards, any treated or discolored <br /> areas should be coated with a cold-galvanizing spray application. In our opinion, although <br /> the existing screws show signs of corrosion, they are still adequate to support the <br /> anticipated design loads. Similar as for the roof deck, corroded screws should be cleaned <br /> and treated with a cold-galvanizing spray application. Prior to installing the new roof <br /> overlay, KPFF should be contacted to make a site visit to observe the condition of the deck <br /> repair. <br /> We did not complete an analysis of any of the gravity load-carrying or lateral load-carrying <br /> elements. KPFF was asked to provide our opinion on the seismic performance of the shed <br /> roof. Based on the age of the building, the following items likely do not meet current seismic <br /> code-level design forces: <br /> 1. Shed roof anchorage to primary building tilt-up wall panels <br /> 2. Primary building tilt-up wall panels that support shed roof <br /> 3. Primary building tilt-up wall panel anchorage to primary building roof structure <br /> I trust this provides the information you need. Please do not hesitate to contact me at <br /> (206) 622-5822 if you have questions regarding the contents of this letter or would like <br /> further assistance. <br /> Sincerely, <br /> aZ <br /> Adam M. Radke, PE <br /> Project Engineer <br /> 10091800150 <br />