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AdditionalOctober 20Mr. Art SkotdaCol <br /> Skotdal Real Estate <br /> Plan Check Numbemments:r: B1906-031, Second Building Review - Structural <br /> 1 <br /> 43.The wood-framed building has been evaluated and loads distributed using a flexible diaphragm <br /> assumption. However, the buildingis an open-front structure in both directions, with <br /> p p <br /> diaphragms exceeding six feet. Note that the shear walls on Grids 1.2/G-G.9 and 7.8/G.5-H.2 <br /> are located at the east ends of the diaphragms and do not have effectively load paths for the <br /> full diaphragm width, resulting in long diaphragm cantilevers to the walls on Grids 2.2/B.7-D.7 <br /> and 7.1/B.4-E.8. The design of the building shall be revised considering a rigid or semi-rigid <br /> analysis. Calculations substantiating the distribution of forces considering the relative <br /> stiffnesses of the shear walls shall be submitted for review. The calculations shall include <br /> revised documentation for the design of the shear walls, diaphragms, and holdowns. <br /> Alternatively, additional shear walls and drag framing shall be provided to eliminate the open- <br /> front conditions. See IBC Section 2306.1, and AWC SDPWS-15 Sections 4.2.5 and 4.2.5.2. <br /> 411° <br /> 44. Continuing with the previous comment, the structure shall be designed for torsional effects. <br /> Documentation evaluating the structure shall be submitted for review. See IBC Sections 1613.1 <br /> and 2306.1, ASCE 7-10 Sections 12.8.4.1, 12.8.4.2, and 12.8.4.3, and AWC SDPWS-15 Section <br /> 4.2.5.1. <br /> 45.The shear wall design appears to consider all walls as full-height wall segments per AWC <br /> SDPWS-15 Section 4.3.5.1. However, the structure appears to include walls with openings. <br /> Examples include, but are not limited to, the walls at Grids 1.2/G-G.9, 3.6/G.1-G.7, and 5.9/G.3- <br /> H.2. Supplemental documentation designing the walls as either force-transfer or perforated <br /> shear walls per Sections 4.3.5.2 and 4.3.5.3, respectively, shall be submitted for review. <br /> Alternatively, the wall design shall be revised to provide holdowns at the ends of each wall <br /> segment. See IBC Section 2306.1. <br /> This review has been performed for general compliance with the building codes as adopted and <br /> amended by the state of Washington and the city of Everett. Corrections and comments made <br /> during the review process do not relieve the project from compliance with code and permit <br /> requirements. The designers-of-record are responsible for a complete design in accordance with <br /> the laws of the state of Washington. <br /> If you have any questions or require additional clarification, please contact us. <br /> Respectfully, <br /> Drew Martin, P.E., S.E. <br /> Associate Engineer/ Commercial Plans Examiner <br /> (425)257-8813 <br /> dmartin@everettwa.gov <br /> S:\BMartin\2019\B1906-031_R2-STR.docx <br /> S <br /> 3200 Cedar Street �J 425.257.8810 0 everetteps@everettwa.gov <br /> Everett,WA 98201 425.257.8857 fax CF7age 11 of 11 <br />