1920 100TH ST SE 2023-06-28 - Laserfiche WebLink

b2 structural D/ ( LIIen ineers info@b2engineers.com 425-318-7047 (0) JUL 15 ��20 425-318-0031 (C) CITyoFE\E Permit rer RETT SEAMAR EVERETT ADDITION v!ces 1920 100TH SE, EVERETT, WA 98208 RESPONSE TO COMMENTS PROJECT NO: 20055 DATE:06-04-20 PREPARED BY: BASRI BASRI PE,SE RESPONSE TO COMMENTS 1.The"Concrete and Reinforcing"section of the General Notes and Specifications on Sheet S-0 specifies strengths of 2,500 psi for all concrete elements. The exterior foundation walls appear to be exposed to freeze-thaw conditions and water, and qualify as Class F2 concrete per ACI 318-14 Table 19.3.1.1. Per ACI 318-14 Table 19.3.2.1, the minimum concrete strengths for Class F2 concrete is 4,500 psi. The minimum concrete strength for exposed concrete should be revised as required. See IBC Section 1901.2. RE: PLEASE SEE UPDATED "CONCRETE AND REINFORCING" SECTION OF THE GENERAL NOTES ON S-0. CONCRETE STRENGTH OF THE FOUNDATION WALL AND FOOTING HAS BEEN MODIFIED TO 4,500 PSI. 2.The"Dimensional Lumber"section of the General Notes and Specifications on Sheet S-0 specifies the wall stud species as Hem-Fir. The capacities in the shear wall schedule in Detail 7/S-2 and the structural calculations appear to be based on Douglas-Fir. The notes should be revised. See IBC Section 2307.1 and AWC SDPWS-15 Table 4.3A Footnote 3. RE: PLEASE SEE UPDATED "DIMENSIONAL LUMBER" SECTION OF THE GENERAL NOTES ON S-0. SPECIFIES THE WALL STUD SPECIES HAS BEEN MODIFIED TO DOUGLAS-FIR. 3. Detail 2/S-2 shows the wood-framed wall located adjacent to exposed earth. The framing and sheathing should be located at least 8 inches above grade. Alternatively,the wood-framed wall should be constructed of preservative-treated or naturally-durable wood. See IBC Section 2304.12.1.2. RE: PLEASE SEE UPDATED DETAIL 2/S-2. 8" MIN CLEARANCE HAS BEEN ADDED TO DETAIL. Foundation System: 4.The foundation wall in Detail 2/S-2 specifies soil preparation per the notes on Sheet S-1. The "Foundation"section in the General Notes and Specifications on Sheet S-0 indicates that a geotechnical report has not been prepared. The detail should be revised to specify the soil preparation requirements. See IBC Sections 107.2.1 and 1804. RE: PLEASE SEE UPDATED DETAIL 2/S-2. SOIL PREPARATION NOTE HAS BEEN ADDED. Gravity System: 5.The project includes a two-hour fire wall per the First Floor Plan on Sheet A2.03. The structure is required to be designed and detailed to allow collapse of the structure on each. The design does not appear to satisfy this requirement. Notable issues include, but are not limited to,the continuous north and south shear walls through the fire wall, and the north-south oriented truss spanning over the firewall. The structural design should be revised. See IBC Section 706.2. RE: THE STRUCTURAL DESIGN HAS BEEN REVISED. PLEASE RESPONSE TO COMMENT#6 TO 9