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CONSULT <br />�2 <br />l SIG <br />REST0R , <br />12 BUILDING CONSULTANTS, INC. <br />February 14, 2020 <br />Ian Dugan <br />Commercial Industrial Roofing Inc. <br />3601 1215t Street SW <br />Lynnwood, WA 98087 <br />Sent Via Email: Ian@cir-roofing.com <br />Re: Nautica Soundview Condos — Structural Review of Additional Roof Dead Load <br />Property Address: 2818, 2824 Grand Avenue, Everett, WA 98201 <br />Dear Mr. Dugan, <br />The purpose of this memo is to address the additional dead load on the roof structure as a result of the <br />proposed re -roofing. <br />The 2015 International Existing Building Code, Section 1103.2 states that "existing structural elements <br />supporting any additional gravity loads as a result of additions shall comply with the International <br />Building Code". However, there are exceptions, including Exception 1 which is "Structural elements <br />whose stress is not increased by more than 5%". The weight of the proposed new Carlisle TPO roofing <br />system is 0.83 psf. The current dead load of the roof system is 22.4psf. The proposed dead load is less <br />than 5% of the existing. This percentage is further reduced considering design snow loads. <br />Therefore, the proposed additional dead load from the new roof system is acceptable according to the <br />above referenced code section. Refer to the attached dead load calculations for further information. <br />Please advise if further clarification is needed. <br />Sincerely, <br />12 BUILDING CONSULTANTS, INC. <br />39655 <br />*ISTE <br />Drat, <br />EXPIRES: 3/21 2Q2Q <br />Ryan Paddock, Principal, P.E. <br />3425 441 Ave V,' I Mukilteo, WA 98275 1 (425) 774-5600 <br />www,J2CONSULTANTS.COM 17 Southwest Globs Street j Porl:land, OR 97239 1 (503) 546-8212 <br />'75 5 Main Street, Suite 500 i Salt Lake City, UT 841,11 1 (385) 202-6377 <br />