2715 MAPLE ST A & B 2024-01-08 - Laserfiche WebLink

Mr. Ismail Mohammad 2713 Maple Street, LLC Plan Check Number: B2101-051, Third Building Review April 22, 2022 included to splice new foundation elements into the existing foundations. Anchorage is required per Sections R403.1.6 and R602.11.1. See Sections R403 and R404. 6. This comment has not been completely addressed. Detail 603/S03 has been added to frame new openings in the walls. This is a standard detail based on conventional wall construction and story heights. The building includes atypical tall walls that are balloon framed with the floor system. Additional king studs should be provided. Additional modifications should be performed as required for the detail to be compatible with the existing framing. See Sections R602.7 and R602.7.5. 7. This comment has not been completely addressed. An engineered design has been performed for the anchors per Section R301.1.3, including post -installed anchors. Hold-down and shear anchor designs are required per ACI 318-14 Sections 17.2.3.4.3 and 17.2.3.5.3, respectively. The holdown design should include vertical seismic effects per ASCE 7-10 Section 12.4.2.2. See IBC Sections 1604.1, 1604.4, 1613.1, and 1901.2. 8. This comment has not been completely addressed. The response does not address the new shear walls on the south side of the building. Note that the construction drawings do not provide details for the construction of the walls; see other comments. Sill plates and floor sleepers in contact with concrete are required to be preservative -treated or naturally -durable materials per Section R317.1 Item 3. 10. This comment has not been completely addressed. Details 601 through 603 on Sheet S03 have been included showing connections between the second floor and exterior wall framing. See IBC Sections 1604.1, 1604.4, 1605, 1609.1, 1613.1, and 2306.1. The following comments should be addressed: a. Calculations should be submitted substantiating the design of the connections. The connections are required to transfer gravity loads concurrently with either in -plane (i.e., seismic) and out -of -plane (i.e., wind) loads. Both conditions must be evaluated. The wind loading, C&C pressures should be used per ASCE 7-16 Chapter 30. b. Fasteners have not been specified to transfer loads from the ledger framing to the structural walls. Fasteners should be provided between the existing wall sheathing into the blocking. c. The transfer of gravity loads via blocking between the studs provides a poor load path. The blocking will be installed loose and is presumed to be fastened with toenails. Note that the stiffness of the existing top plates in the north wall will result in the flexible upper blocking resisting a negligible percentage of the load; all gravity loading will only transfer through one-half of the nails at the top plate. The ledgers should be fastened directly to the studs for the transfer of gravity loads. d. Detail 603 for the north wall incorrectly shows the new sheathing extending into the existing wall framing. The detail should be revised. e. The details reference the plans for the diaphragm construction. This does not appear to be specified. Details for the diaphragm construction, including but not limited to panel layout, orientation, and blocking, should be provided. 3200 Cedar Street © 425.257.8810 O everetteps@everettwa.gov Everett, WA 98201 425.257.8857 fax everettwa.gov/permits Page 4 of 5