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

Mr. Randy Heltne Everett Housing Authority Plan Check Number: B1807-032, Second Review October 17, 2018 Sheets A-6 and A-7 indicate that a prefabricated roof truss may align with the existing east wall below and provide a load path between the roof diaphragm and wall line. The design load for the truss shall be specified in the structural design criteria; the load shall be identified as allowable or nominal. If the truss is not part of the lateral load path, tributary roof diaphragm loads shall not be directly applied to this wall line. See IBC Sections 107.2.1, 1603.1.8, and 1604.4. 29.This comment has not been completely addressed. Calculations for the design of the holdowns to the concrete foundations shall be submitted for review. The holdown forces shall be increased per ACI 318-14 Sections 17.2.3.4.3 and 17.2.3.3. The overstrength factor shall be applied to the seismic component, not the net uplift force. Note that the holdown forces in the structural calculations are based on ASD load combinations; forces shall be recalculated using LRFD load combinations. See IBC Sections 1604.10, 1613.1, and 1901.2, and ASCE 7-10 Section 12.4.3.2 Equation 7. Miscellaneous: 30.This comment has not been completely addressed. The project includes a new canopy on the west side of the building. See IBC Sections 107.2.1, 1603.1, and 1604.1. The following comments shall be addressed: a. The roof ridge beam and beam supporting the king post are framed with 4x8 beams, while the more lightly-loaded eaves are framed with 6x8 beams. Verify the size of the ridge and king post beams. b. The roof ridge beam appears to be supported by a 4x4 post that bears on an existing (2)2x10 header. However, the canopy roof frames over the existing roof framing. Verify the load path. Provide a detail including framing connections clarifying the condition. c. The eaves are framed with 6x8 beams that extend back to and appear supported by the existing building corners. i. The framing appears to conflict with the existing roof eave framing. A detail clarifying the construction shall be provided. ii. A details connecting the beams to their supports shall be provide. d. Positive connections shall be provided between the posts and foundations on Sheet A-3. e. Detail 4/S5.1 appears to show the king post at the canopy. i. The detail shall be referenced on Sheet A-1. ii. The detail shall provide a positive connection between the king post and the supporting 4x8 beam. Additional Comments: 31.The Holdown and Shear Wall Schedules on Sheet S2.1 have been added in response to the original review comments. The capacities in the schedules shall be identified as allowable or factored. See IBC Section 107.2.1. Page 9 of 10 CITY OF EVERETT• 3200 Cedar Street • Everett, WA 98201 • (425) 257-8810 • Fax(425) 257-8: