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Mr. Miles Walker <br /> BNH Architects, P.S. <br /> Plan Check Number: B1801-036, First Review <br /> February 23, 2018 <br /> c. The transverse reinforcement shall include cross-ties as required by ACI 318-14 Sections <br /> 10.7.6.1.2 and 25.7.2.3. <br /> 10. Details 3/AF1.0 and 4/AF1.0 do not appear to include dowels between the new and existing <br /> slabs. Dowels are recommended to minimize settlement between the slab edges. See IBC <br /> Section 1808.2. <br /> 11.The second floor 3x13.25 beams have been evaluated considering a live load of 30 psf per <br /> pages 1-2 of the structural calculations. The load conditions on the beams have changed and <br /> appear to be higher due to concentration of applied loads. Existing framing shall meet the <br /> requirements of the IBC per IEBC Section 807.4. It appears the second floor is used for office <br /> space and shall be designed for a 50 psf live load and 2,000 lb concentrated load per IBC Table <br /> 1607.1 Item 22. In addition, the design shall include a 15 psf partition load per IBC Section <br /> 1607.5. The design shall consider the unbraced lengths along the stairway opening unless <br /> lateral restraint is provided. Note that if the second floor diaphragm consists of straight <br /> sheathing oriented parallel to the beam, nailing to the sheathing will not provide adequate <br /> restraint. Revised calculations substantiating the design should be submitted for review. <br /> Calculations verifying the capacity of the connections to the existing columns should also be <br /> submitted for review. See IBC Section 1604.1. <br /> 12. Detail 5/AF1.1 indicates that the lower stairway is effectively constructed of 5.5-inch deep <br /> wood joists at 12-inch spacing. The stringers do not appear adequate considering the <br /> minimum clear span of 7.5-feet per Section 1/A8.1, and dead and live loads of 15 psf and 100 <br /> psf, respectively. Documentation substantiating the design of the stringers should be <br /> submitted for review. The design should also evaluate the 300 lb concentrated load per IBC <br /> Table 1607.1 Item 30. <br /> 13.The structural documents do not appear to include a design for the second floor stairway <br /> shown in Plan 5/A8.1. Details for the stairway should be included in the structural plans. <br /> Calculations substantiating the design should be submitted for review. See IBC Sections <br /> 1603.1 and 1604.1. <br /> 14.The structural drawings appear to be missing nailing between the floor sheathing and the <br /> framing. See IBC Section 107.2.1. Nailing should be specified in the following locations: <br /> a. Plan 1/AF1.1: New mezzanine floor at elevator. Sheathing must also be specified. <br /> b. Plan 1/AF1.1: Existing sheathing to new framing. <br /> c. Plan 2/AF1.1: Existing sheathing to existing and new framing. <br /> d. Sections 3/AF1.1,4/AF1.1, and 5/AF1.1: Landing and steps. <br /> 15. Plan 1/AF1.1 shows a new GL5-1/8x16-1/2 beam spanning parallel with the existing joists. <br /> The purpose of and loading conditions on the beam are not clear. The beam does not appear <br /> to be included in the structural calculation package. Documentation substantiating its design <br /> should be submitted for review. See IBC Section 1604.1. <br /> (e4of6) <br /> CITY OF EVERETT• 3200 Cedar Street • Everett, WA 98201 • (425) 257-8810 • Fax(425) 257-$857 <br />