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S <br /> • Mr. Mcllvain <br /> CRM Architects&Planners, Inc. <br /> Plan Check Number: B1805-010, First Review <br /> August 1, 2018 <br /> 4. The structural drawings include work that has been deferred by the structural engineer. A <br /> statement of deferred submittals shall be added to the Structural Notes and Specifications on <br /> Sheet SO.0 listing work designated as deferred submittals. The note shall include a statement <br /> requiring the engineer-of-record to review deferred submittals for conformance with the <br /> construction documents. See IBC Sections 107.2.1, 107.3.4, 107.3.4.1, and 107.4. The <br /> following is a summary based on a review of the construction documents: See structural <br /> response letter <br /> a. Metal plate-connected wood trusses. <br /> b. Steel-framed canopies. <br /> 5. Sheet S3.0 shows a "SNOW DRIFT"diagram indicating a maximum surcharge of 22 psf and <br /> drift width of 8'-0". The structural calculations by Bennett & Pless calculate values of 39 psf <br /> and 9'-4", respectively. This is consistent with the requirements of ASCE 7-10 Sections 7.7.1 <br /> and 7.8. The diagram should be revised. See IBC Section 1608.1. See structural response <br /> letter <br /> 6. Note 3 of the"Design and Loading"criteria in the General Notes and Specifications on Sheet <br /> SO.0 specifies a ground snow load of 20 psf. The roof snow load shall include an additional <br /> rain surcharge of 5 psf per ASCE 7-10 Section 7.10. The design of structural framing subjected <br /> to increased loading should be reviewed and revised as needed. Alternatively, a uniform load <br /> of 25 psf may be specified for the design, as recommended by the WABO-SEAW White Paper <br /> "Snow Load Regulations and Engineering Practices"(August, 2000); the additional 5 psf <br /> surcharge is still recommended for roof slopes less than 1/2:12. See IBC Section 1608.1. See <br /> structural response letter <br /> 7. The design seismic and wind base shears should be stated in the"Design and Loading"criteria <br /> in the General Notes and Specifications on Sheet SO.0. See IBC Sections 1603.1.4 and <br /> 1603.1.5. See structural response letter <br /> 8. Weights for mechanical equipment on the roof are specified on A5.1 and S3.0. The weights <br /> are not consistent between the drawings. Weights are not specified for some units on Sheet <br /> A5.1. The correct weights should be verified and specified on one sheet only. See IBC <br /> Sections 107.2.1 and 1603.1.8. See structural response letter <br /> 9. Details 1, 2, 3, and 5 on Sheet SF1.2 are marked as"For Reference Only". The design for the <br /> building systems in these details appears to be provided in the S-series drawings. The details <br /> should be removed. See IBC Section 107.2.1. See structural response letter <br /> Foundation System: <br /> 10.The concrete schedule in Note 3 of the"Concrete" section on Sheet SF1.0 specifies concrete <br /> strengths less than 4,500 psi. The project appears to include concrete elements that are <br /> exposed to freeze-thaw cycles and water, and qualify as Class F2 concrete per ACI 318-14 <br /> Table 19.3.1.1. Per ACI 318-14 Table 19.3.2.1, the minimum concrete strength for Class F2 <br /> concrete is 4,500 psi. The minimum concrete strengths for exposed concrete on Sheet SF1.0 <br /> should be revised as required. See IBC Section 1901.2. See structural response letter <br /> Page 5 of)-1-7 <br /> CITY OF EVERETT• 3200 Cedar Street• Everett, WA 98201 • (425) 257-8810 • Fax(425) 25 - <br />