7018 BEVERLY BLVD 2022-07-20 - Laserfiche WebLink

Structural ZVELT ENGINEERING DESIGN, PLLC (ZED) Review Structural Engineering Letter D Mr. Drew Martin ©!Ell /c ;:rTs\ City of Everett Permit Services ` cr 3200 Cedar Street, 2nd Floor / {a;. Everett, WA 98201 on Ci n l September 18, 2020 �1 rvicesi e ZED Project: 20-108 Subject: Revision for Svetleachni Residence located at the address 7018 Beverly Blvd, Everett, WA 98203. City of Everett— B2007-007 Dear Mr. Martin: The purpose of this letter is to respond to the City of Everett review of September 18, 2020. Item numbers below correspond to the items listed on the City's Review Letter. Structural Item #1: Shear Wall Note 2 on Sheet S2 stated that post-installed anchors may be used in lieu of CIP AB. This will require additional analysis per ACI 318-14 Section 17.2.3.5.3. Alternatively, the post installed connections should be removed. Note that the cast-in-place anchors should comply with amendments to ACI Section 17.2.3.5.2 per IBC Section 1905.1.8 unless they are designed as indicated above. ZED Answer: Sheet S2 was revised and post-installed anchors will not be recommended. Item #2: The shear wall design appears to use the segmented wall procedure of APA SDPWS-15 Section 4.3.5.1. Holdowns are required at the ends of multiple second story walls and are connected to beams. Beams, framing supporting the beams (e.g., posts), and the connections including at the foundation, are required to be design including overstrength on the seismic component and vertical seismic effects. See ASCE 7-10 Sections 12.3.3.3, 12.4.2.2, and 12.4.3.2. Per correspondence with the engineer-of-record, loading information was provided to the AOR. However, the gravity beams do not appear to include the required seismic loads. In addition, the information provided by the FOR does not appear to include vertical reactions along the north elevation. Calculations substantiating the design of the gravity framing supporting discontinuous walls should be revised. ZED Answer: The shear wall design was based on the segmented wall procedure. Holdowns have been provided where required following the calculations for each wall segment on the upper and main floors. Please find attached sheets A6 and A8, pages 18 and 19 on the calculation package. The locations and values of the forces from the seismic component and vertical effect on the beams below including the omega overstrength factor and the load combinations have been provided to the AOR to be considered in the gravity section. Attachments: Structural S-sheets, upper and main shear wall mark-ups,seismic vertical effect-forces mark-ups. 6619132nd Ave NE,#126 Page 1 2' ; zvelt.eng@outlook.com Kirkland, WA 98033 425-242-8042