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Page 1 of 5 <br /> info@b2engineers.com ■.. <br /> 425-318-7047(0) g <br /> 425-318-0031 C <br /> ( ) <br /> FEDERAL AVE RESIDENCE 7 <br /> 3403 FEDERAL AVE, EVERETT, WA 98201 r43111EN�•������►� <br /> RESPONSE TO COMMENTS -����' <br /> PROJECT NO: 22082 DATE:08/04/23 <br /> PREPARED BY: BASRI BASRI PE, SE <br /> Design Criteria <br /> International Building Code (IBC) 2018 <br /> American Society of Civil Engineers (ASCE) 7-16 <br /> Pro'ect Description <br /> 1.See Sheet S-4. The project appears to include retaining walls that require engineering. Structural <br /> calculation for the retaining walls appears to not be included in the submittal documents.Where <br /> a structural design is performed per Section R301.1.3, structural drawings and calculations should <br /> be prepared by a professional engineer licensed in the state of Washington; the drawings and <br /> calculations should bear the seal and signature of the engineer. See RCW Sections 18.43.010, <br /> 18.43.020, and 18.43.070. IRC R404.4, IBC 1807.2 <br /> Response: Please see the attached page 2-5 for the retaining wall calculations. Per discussion with the <br /> architect, the proposed site grade will be adjusted to allow 4 ft tall maximum concrete retaining wall. <br /> 2.The drawings should provide the design parameters for the design of the retaining walls. Note <br /> that retaining walls supporting more than 6 feet of backfill should incorporate the additional <br /> seismic lateral earth pressure. R106.1.1, IBC 1807.2.2 <br /> Response: Please refer to the detail 1 on sheet S-3. The active soil pressure is 35 pcf with vertical <br /> surcharge of 50 psf. The maximum height for retaining soil is 4 feet therefore seismic lateral pressure <br /> is not required. <br /> 3.It appears that soldier piles are specified on Sheet S-4. Calculations substantiating the design <br /> should be submitted for review. Sheet S-0 should be updated to specify the required special <br /> inspections per IBC Section 1705.7. <br /> Response: Please refer to the detail 1 on sheet S-3, The soldier piles are not needed since the <br /> maximum excavated soil height is 4 ft. <br />