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<br />May 7, 2024 <br /> <br />Randy Loveless, PE <br />City of Everett <br />3200 Cedar St <br />Everett, WA 98201 <br />(425) 257-8825 <br />Project #: 2405-0001 <br />RE: City of Everett Reservoir 1 Roof Evaluation – Scope and Fee Proposal <br /> <br />Dear Randy- <br /> <br />Thank you for the opportunity to provide structural engineering services for the evaluation of the City of Everett <br />Reservoir 1. Based on previous conversations, Peterson Structural Engineers, Inc. (PSE) understands that you are <br />requesting a visual condition assessment and evaluation of the existing roof framing to identify potential <br />structural deficiencies. <br />Based on previous conversations and review of historical information provided by the client, PSE understands <br />that the Everett Reservoir 1 consists of (2) adjacent structurally similar 375,000 gallon bolted steel reservoirs. <br />PSE understands that original construction was in 1931 and roofs were added in 1971. The roof is (12)-sided, has <br />a central vent, and a slope of 4V:12H. (12) radial 5x177/8 glulam beams are supported by the exterior walls and <br />a central steel compression ring. 4x8 purlins span between the glulam beams and support plywood sheathing <br />topped with composite roofing. The top of the shell wall was retrofitted to provide bearing support for the <br />glulam beams. At the time of this scoping, limited historical records were made available to PSE regarding the <br />shell, floor, and foundation construction. PSE understands that previous assessments were completed by <br />Northwest Corrosion Engineering in 2012 and 2018 to review the conditions of the interior and exterior coatings <br />and identify corrosion issues, but detailed review or analysis of roof framing was not included. <br />PSE understands that the City has requested a structural evaluation of the existing roof for current code-required <br />gravity loads. The following proposal includes site visits to assess existing material conditions and gather <br />information, a structural analysis of the roof framing, a qualitative assessment of the lateral force resisting <br />system to identify potential lateral load-path deficiencies, and reporting of deficiencies identified by the <br />evaluation. The subject proposal does not include services for a full seismic evaluation or retrofit design. <br />