2701 12TH ST 2020-05-06 - Laserfiche WebLink

Mr. Randy Heltne Everett Housing Authority Plan Check Number: B1807-032, First Review September 14, 2018 14.The overframing design on Sheet A-7 is incomplete. The framing appears to require ridge members and a vertical load-bearing element at the intersection of the ridge members. Connections shall be specified between the framing. The west end of the west-most ridge member may bear directly on the sheathing; blocking shall be provided at the load point as needed. The structural design shall be reviewed and revised as needed. Calculations substantiating the design of the overframing members shall be submitted for review. Note that the 2x8 joists have spans up to 16 feet that appear to be overstressed. See IBC Sections 107.2.1, 1603.1, 1604.1, 1613.1, and 2306.1, ASCE 7-10 Chapter 30, and AWC SDPWS-15 Section 3.4.1. 15.The roof plan on Sheet A-7 specifies roof trusses spanning 41.5 feet. The trusses ae non- uniform and have interrupted top chords due to the roof geometry. It is not clear that the roof construction can performed as specified for the required span. Note that the first two trusses will be approximately 24-inches deep or less. Preliminary design documentation including manufacturer's literature substantiating the feasibility of the design shall be submitted for review. See IBC Sections 104.11 and 1604.1. 16. Continuing with the previous comment, holdowns shall be specified for the roof trusses to resist uplift loading due to wind. Calculations substantiating the holdowns shall be submitted for review. See IBC Sections 107.2.1, 1604.1, 1613.1, and 2306.1, ASCE 7-10 Chapter 30, and AWC SDPWS-15 Section 3.4.1. 17.The roof plan on Sheet A-7 does not specify framing for the east roof eve. The plywood sheathing is not structurally adequate for the approximately 2-foot cantilever. A detail shall be provided showing the required construction. The construction shall be sufficient to resist both gravity loading (e.g., self-weight, snow) and uplift due to wind. See IBC Sections 107.2.1, 1603.1, 1604.1, 1613.1, and 2306.1, ASCE 7-10 Chapter 30, and AWC SDPWS-15 Section 3.4.1. 18.The floor framing plan on Sheet A-4 specifies a new steel beam at the existing exterior east wall. See IBC Sections 107.2.1, 1603.1, 1604.1 The following comments shall be addressed: a. The calculations are based on a 24'-8"span while Sheet A-2 indicates the span is 28'-3". The calculations do not include an additional 15 psf partition load per IBC Section 1607.5. It appears that the W12x45 beam noted in the calculations is overstressed and should be revised. Note that the point loading, presumed to be from the roof, should be clarified. b. The required size of the beam shall be specified on Sheet A-4. c. Sheet A-2 appears to specify a 4x6 post at the north end of the beam. The support at the south end shall also be specified. d. Details and calculations for the connections between the beam and posts shall be submitted for review. Page 8 of 11 CITY OF EVERETT• 3200 Cedar Street • Everett,WA 98201 • (425) 257-8810 • Fax(425) 257-88