3333 NASSAU ST 2024-08-07 - Laserfiche WebLink

October 3,2016 Single-Family Residence L&A Job No. 16-124 Page 14 native, undisturbed, very-dense, cemented, glacial till soil prior to pouring concrete for the footings. lithe above recommendations are followed, our recommended design criteria for footing foundations are as follows: • The allowable soil bearing pressure for design of footing foundations, including dead and live loads, should be no greater than 3,000 psf. The footing bearing soil should be verified by a geotechnical engineer after the footing trenches are excavated and before the footings poured. • The minimum depth to bottom of perimeter footings below adjacent final exterior grade should be no less than 18 inches. The minimum depth to bottom of the interior footings below top of floor slab should be no less than 12 inches. • The minimum width should be no less than 18 inches for continuous footings, and no less than 24 inches for individual footings, except those footings supporting light-weight decks or porches. A one-third increase in the above recommended allowable soil bearing pressure may be used when considering short-term, transitory, wind or seismic loads. For footing foundations designed and constructed per recommendations above, we estimate that the maximum total post-construction settlement of the buildings should be 3/4 inch or less and the differential settlement across building width should be 1/2 inch or less. Lateral loads on the proposed residence may be resisted by the friction force between the foundations and subgrade soils or the passive earth pressure acting on the below-grade LIU & ASSOCIATES INC. 3