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CASCADE CREST CONSULTING ENGINEERS,INC. <br /> September 13,2024 <br /> Commercial Industrial Roofing,Inc. <br /> 3621 12111 Street SW <br /> Lynnwood,WA 98087 <br /> Attn: Alexander Isaev <br /> RE: Proposed Roof Overlay <br /> Heidelberg Asphalt Batch Plant Building <br /> 222 W. Marine View Drive <br /> Everett, Washington <br /> Parcel No: 29050700101200 <br /> Cascade Crest Consulting Engineers,Inc. (CCCE)has performed a structural review of the roof <br /> framing for the Plant Building(only)at the above referenced project to verify support for a proposed <br /> roof overlay(recovering). Our review consisted of calculations based on information gathered <br /> during our site observations conducted on September 5,2024, field dimensions provided by <br /> Commercial Industrial Roofing(CIR)during our site visit, and proposed roofing weight information <br /> provided to us by CIR. The existing roof system consisted of a standing seam metal roof only(i.e., <br /> no previous overlay). This letter summarizes our observations and findings. <br /> Existing Building Description <br /> The project consists of a one-story,—11,227 sf manufactured metal building,which according to <br /> Snohomish County property records was constructed in 1995. The building is approximately 103' x <br /> 109' in plan and 80' in height. <br /> Based on our site observations,the typical roof framing consists of a standing seam metal deck roof <br /> placed over a 1"fiberglass insulation barrier which is supported by 8"deep,light gage Z-channels at <br /> 36 inches on center,which in turn span to tapered steel girders and columns at 30 feet on-center. The <br /> exterior walls also utilize metal siding supported by C-channel wind girts spanning between columns. <br /> The building is likely supported by concrete spread footings, although a pile foundation system may <br /> also have been provided. The ground floor predominately consists of a concrete slab. <br /> The original construction drawings for the buildings were not provided for our review. Therefore, <br /> general dimensions were obtained during the site visit for the critical roof members. The roof live <br /> load used in the original design have not changed in the current code(25 psf). Due to the lack of <br /> parapets,no snow drift loads are anticipated. <br /> The existing roof weight was assumed based on the information gathered during our site visit and <br /> determined to be approximately 4.71b/sf including the metal roof,insulation,joists, and sprinkler <br /> lines. The existing roof consisted of 1 layer of standing seam metal decking(assumed 20 gage <br /> thickness). The joists were assumed to be 8ZS2.75x105,Fy=55ksi based on the dimensions provided <br /> and the required capacity for the original design criteria. <br /> Cascade Crest Consulting Engineers-PO Box 2242,Sisters,OR 97759-(541)419-5139 <br />