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

Mr. Drew Martin 2713 Maple Street, LLC Plan Check Number: B2101-051, Second Building Review March 7th, 2022 7. Continuing with the previous two comments, it is presumed that the braced walls and foundation anchors will comply with the prescriptive limits of the IRC. If an engineered design is performed for the anchors per Section R301.1.3, 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. The design has been engineered. Existing shear walls and foundations are adequate for current codes. Additional 2nd floor tension ties and main floor hold downs are shown on the floor plans. 13 'The Main Level wood 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. Existing sill plates are pressure treated per Dwg No. A4. Proposed party wall in contact with concrete will be pressure treated. Note added to section D on Dwg No. A4 9. Wood framed construction should specify a minimum clearance of 6 inches and 2 inches above exposed earth and impervious surfaces, respectively, per Section R317.1 Item 5. 8" is shown on the existing wall details (A1.2). No changes are proposed. 10. The proposed design includes demolition and reconstruction of the mezzanine. The mezzanine level was integrally constructed with the east exterior bearing wall, but did not contact the north and west walls; connection to the south wall is not clear. Reference the"Typical Wall Section" in record drawing "Sheet 4/6"on Sheet A1.2. Section C/A4 indicates that the Second Floor framing will be integrally constructed with the existing walls; it is not clear how this will be accomplished. The connection to the north and south walls is not indicated. Details clarifying the connection of the floor framing and walls should be provided. At a minimum, the walls require lateral support at this level per Section R301.3 Item 1. The proposed floor joists are the same height as the existing joists (11-7/8"TJI's). Note added to cut the existing joists and leave the ends in place. Nail bottom flange of the new joists to the existing top plate w/ (2) 16d nails. This provides sufficient out-of-plane capacity to brace the exterior walls. ",r-Continuing with the previous comment, the construction of the new stairs in the northeast and southeast corners interrupts the lateral support at the Second Floor discontinuity of the east wall studs. In addition, the studs along the stairs on the east, north, and south walls exceed the maximum allowable height of 11'-7" per Section R301.3 Item 1. Revised wall framing and details are required. Calculations substantiating the wall construction for bearing and out-of- plane loading for all sides of the building, including top and bottom restraint by the foundation and roof, should be submitted for review. See Section R301.1.3, and IBC Sections 1603.1, 1604.1, and 1604.4. The double 2x6 top plate is adequate to span the 10 ft of unsupported wall. Calculations added for out-of-plane support. Page 7of8