2713 MAPLE ST A & B 2024-01-08 - Laserfiche WebLink

Mr. Drew Martin 2713 Maple Street, LLC Plan Check Number: B2101-051, Third Building Review May 9th, 2022 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 ressures should be used per ASCE 7-16 Chapter 30. p46 `i or cfiu.S Calculations added for ledger connection to existing studs. 6 r-dLY i 5M ii. Shear and seismic analyses have been updated for revised shear walls. ill. C&C pressures used to check out of plane loading on infill walls. 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. i. Fasteners added to detail he transfer of gravity loads via blocking between the studs provides a poor load path. The c. e 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. J�pit-S (90f TO cO3 are 5pcz,i Y /VI3tic i. Added callout for ledger fastened directly to studs using LedgerLOK's. zei<Detail 603 for the north wall incorrectly shows the new sheathing extending into the existing wall framing. The detail should be revised. i. Details updated to show sheathing stopping short of the studs. 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. i. Floor diaphragm hatch pattern and notes added. ii. Roof diaphragm is existing, skylight infill notes have been added to match existing diaphragm thickness and nailing. This comment has not been completely addressed. The new second floor diaphragm requires continuous chords on all sides. Details should be provided. The new ledgers should be used as the chords as this framing is directly connected to the sheathing. See IBC Section 2306.1 and AWC SDPWS-15 Section 4.1.4. a. Ca/cs added to check diaphragm chord forces. 2x12 ledger is OK for the chord forces. Additional Comments: �4. The details on Sheet S03 include duplicate numbering and should be revised for clarity. See Section R106.1.1. a. Detail numbers updated and callouts added to plans 7f., The proposed project involves substantial demolition and infilling of the majority of the south wall framing, resulting in few of the studs being continuous between the foundation, floor, and roof elements. The existing headers for both stories appear to be left in-place, further preventing the installation of new full-height studs. Continuous studs are required to resist out- of-plane wind loading (i.e., C&C pressures) and are required for the boundary elements of Page 5 of 6