832 80TH ST SW WOLFE PLUMBING 2022-01-24

I i Mr. Ryan Star Wolfe Plumbing Plan Check Number: B2008-027, First Building Review November 13, 2019 Structural General: 1. The Framing Plan on Sheet SO.1 shows three additional doors that are not shown in the Egress Plan on Sheet S0.01. It is understood these may be located at the First Floor level. The plan should be revised for clarity. See IBC Section 107.2.1. 2. The proposed lateral system appears to be a knee-braced frame, which qualifies as an ordinary moment frame (OMF) per ASCE 7-10 Table 12.2-1 and AISC 341-10. The system should be confirmed and the corresponding seismic design criteria listed in the structural design criteria on Sheet SO.1. Note that additional comment provided below are based on this presumed lateral system. See IBC Sections 1603.1.5, 1613.1, and 2205.2.1.2. 3. The egress for the new mezzanine will be provided by the existing stairway per the Egress Plan on Sheet S0.01. Details-should be provided to modify to the existing walls. The wall on the north side should be framed to support an out-of-plane load as required for guards per IBC Sections 1015.2 and 1607.8.1. See IBC Sections 1603.1 and 1604.1. Gravity: 4. The gravity framing at the southwest corner of the mezzanine structure on Sheet SO.1 (i.e., west of the round mechanical duct) appear to consist of beams with shear-only connections at each end. Note that Beam Type"EB12 does not appear to be included in the`Members"list. The design should be clarified and modified as needed to provide vertical restraint for one or more of the beams. See IBC Sections 1604.1 and 1604.4. 5. The gravity framing at the southwest corner of the mezzanine wraps around a round duct. It is understood that the wood-framed flooring system may be fit tight to the duct to prevent a hazard. A detail for the intended construction should be provided. See IBC Section 107.2.1. Lateral: 6. The braces in Detail K/SO.1 appear to exceed limits for slender elements. The design of the braces should be performed per AISC 360-10 Section E7. Alternatively, the braces should be revised to sections with non-slender elements. See IBC Section 2205.2.1.2, AISC 341-10 Section E1.5a, and AISC 360-10 Section B4.1 and Table B4.1a. 7. The design of the lateral frame beams appears to be limited to gravity loads. The beams should be designed for concurrent gravity and seismic loading per ASCE 7-10 Section 12.4.2.3 including vertical effects per Section 12.4.3.3. Calculations substantiating the design should be submitted for review. See IBC Section 1613.1. 8. The columns typically form part of two intersecting orthogonal OMF. The design should consider orthogonal effects per ASCE 7-10 Section 12.5.4. Revised calculations substantiating 3200 Cedar Street 0 425.257.8810 0 everetteps@everettwa.gov Everett,WA 98201 425.257.8857 fax everettwa.gov/permits Page 3 of 4