1225 E CASINO RD 2019-10-31 - Laserfiche WebLink

Plan Check Number: B1907-001, First Building Review 1225 E Casino Road, Everett, 98203 August 7, 2019 Page 3 Response to Structural Correction Item #4: The new foundation detail (2/S-3.00) applies to all of the original residence.The plan was updated to clarify this. The existing addition support posts and foundations are in an acceptable state and do not require replacement. Structural Correction Item #5: The Repair Plan 2/S-1.00 specifies a maximum foundation spacing of 7 feet. The plan also specifies a maximum jack spacing of 6 feet for the south end of the building,which is also noted as being equally spaced between the foundations. The two spacing requirements appear to potentially conflict. The drawing should be reviewed and revised as needed. See IBC Sections 107.2.1 and 1603.1. Response to Structural Correction Item #5: The repair plan (2/S-2.00) has been updated to clarify the extent of the 6-foot and 7-foot spacings.The spacing requirements for the addition were modified to clarify that the existing spacing of the support posts is 6-feet, while the smart jacks shall be equally spaced between adjacent support posts. Structural Correction Item #6: The concrete foundation sizes have been determined based on a proposed allowable soil bearing strength of 2,000 psf. The project does not include a geotechnical report and has referenced IBC Table 1806.2 for the presumptive values. Based on a lack of information on the site soils,the soil strength shall not exceed the lowest value of 1,500 psf. The foundation design shall be revised. Response to Structural Correction Item #6: The calculations were updated to the minimum 1,500 psf allowable soil bearing pressure. The footing detail (2/S-3.00) was updated per the increased minimum footing size. See geotechnical correction item #1. Structural Correction Item #7: The proposed construction of the concrete foundations appears intended to bear directly on the soils under the building with compaction or replacement with sound structural fill (e.g., compact gravel, etc). The structural engineer shall verify. Detail 2/S-2.00 shall include a note stating that verification of the minimum soil bearing strength shall be performed as required under the "Special Inspection"section of the General Notes on Sheet S-1.00 prior to constructing the foundations. See IBC Section 1705.6. Response to Structural Correction Item #7: Based on a site visit made by the engineering of record, the native soil meets the characteristics of the soil classification for the minimum 1,500 psf presumptive allowable bearing pressure. New concrete footings are intended to bear on native soil. The smart jacks call for installation on crushed gravel per the manufacturer(detail 4/S-3.00), unless the TOWER ENGINEERING COMPANY � ? _ 21907 64th Avenue West, Suite 140, Mountlake Terrace, WA 98043-2298