4815 BAKER DR 2023-10-25 - Laserfiche WebLink

Drew Martin From: Drew Martin Sent Thursday, September 9, 2021415 PM To: Jonathan Brandt Subject City of Everett Permit Services: 4815 Baker Drive (B2105-038) - Second Building Review Hello, Jonathan. I've reviewed the resubmitted drawings and calculations. There are still issues that need to be addressed with the structural design. In addition to the comments below, we only received one copy of the revised drawings, and multiple structural sheets (CAD generated) had printing errors (the title blocks are not legible). Two complete copies of the revised drawings and updated structural calculations should be submitted. Please have the structural engineer address the following (itemized for consistency with the original review letter): The following comments should be addressed for the shear wall design: a. The project will require special inspections, including but not limited to post -installed anchors and shear wall nailing. General Structural Note 11 provides some inspection information. The schedule should be provided listing all inspections and the required frequency (i.e., continuous, periodic). See IBC Sections 1704.3.1 and 1705.12.2. It. The post -installed holdowns and sill plate shear anchors need to be designed with overstrength per ACl 318-14 Sections 17.2.3.4.3 and 17.2.3.5.3, respectively. The overstrength factor must be applied to the earthquake component, not the net load. Holdowns should also include the vertical seismic effects per ASCE 7-16 Chapter 12; load should be concurrently to create the maximum effect. c. The calculations do not include a diaphragm analysis. Note that the interface of the diaphragm and shear wall is only 4 feet. While this may work analytically, the roof diaphragm is not provided with subdiaphmgms to transfer forces down the length of the roof to the Point where the wall occurs. Roof sheathing is not permitted to act in tension to transfer seismic loading. A drag element is required along this wall Ilne. The new beam may be used in the load path if connected to the wall with additional structural elements. The beam should be evaluated for concurrent flexural and axial loading. Amplification of seismic loads required by ASCE7-16 Chapter 16 should be included. Additional details may be required. d. The minimum 4-foot length of the wall should be specified in the drawings. A detail may be required to the intersecting walls at each end that may result in the contractor constructing the wall shorterthan required, including a potential gap in the load path between the wall ends and the holdowns. — Drew Martin, P.E., S.E. Associate Engineer —Commercial Plans Examiner I Permit Services 425.257.8810 13200 Cedar Street, 2n0 Floor, Everett, WA 98201 EVERETT Phone Hours: M/W/f:8am-12 land &1pm-3 pm; Tu: 1:00pm-3:00pm everettwa.eov/permits I Facebook I Twitter Note Emails and attachments sent to and from are City of Everts are public records and maybe subject to disclosure pursuant to the Public Records Act.