1700 13TH ST 2020-08-28 - Laserfiche WebLink

Mc instry For The ife Of Your Building MEMORANDUM Date: August 19, 2019 To: Drew Martin From: Jeff Goodwin P.E. Project: PRMCE - D Wing L2 - Surgery Suite Build Out 1700 13th St. Everett, WA 98201 Subject: Response to Permit Review Comments (Plan Check Number X1907-001) As requested, see our comments below in response to the permit reviewer comments (3) associated with the mechanical drawings. In summary, we have reviewed the comments and addressed the items as requested. Please let us know if you have further questions or require additional info. Item 1: The project includes four air terminal units per Sheet M0.02. It is presumed that the units weight approximately 50 lbs each and will require individual gravity suspension and seismic bracing. See IBC 107.2.1, 1604.1, and 1613.1, and ASCE 7-10 Section 14.1.4 Item 6c. The following comment shall be addressed: a., Details for the support of the unit shall be included in the construction documents. b. Calculations for the support design shall be submitted for review. The seismic bracing shall comply with the requirements of IBC Section 13.6. c. It is anticipated that the anchorage will include post-installed concrete anchors connecting to the concrete floor slab above. The drawings shall specify special inspection for the anchors. The types and frequency of the inspections shall be listed. See IBC Sections 1704.3 and 1704.3.1, and Table 1705.3 Item 4. McKinstry Response: a. Units are supported from light gage metal gravity straps per SMACNA standard. Straps are fastened to slab on metal deck soffit with Hilti battery actuated fasteners [McK/JWG 8/19/19]. b. In-line mechanical equipment rigidly connected weighing less than 75 lbs are exempt from seismic requirements per ASCE 7-10 Ch. 13 Section 13.6.7. No seismic calculations are required [McK/JWG 8/19/19]. 5005—3rd Avenue South •Seattle,WA 98134. 206.762.3311 • FAX 206.762.2624