1212 GRAND AVE 2016-01-01 MF Import

March 31, 2008 Mr. Paul Tessier L&A Job No. 8A027 Vage ]0 • Allowable soil bearing prcssure, including dead and live loads, should not be more than 3,000 psf for footings poured on or into dense silty sand and/or hard fine sandy silt soils, and not more than 2,500 psf for footings poured on structural fill constructed on these competent basal soils. The footing bearing soils should be verified on-site by a geotechnical engineer afier the footing trenches have been excavated and before the foolings arc pourcd. • The minimum depth to bottom of'perimeter footings below adjacent final exterior grade should be no Iess than I8 inches. The minimum depth to bottom of the interior footings bclow top of floor slab should be no less than 12 inches. • The minimum �vidth should be no less than 16 inches for continuous footings, and no less than 24 inches for individual footings, except those footings supporting light-weight porchcs and wood deck. The widths of the existing house footings should be verified based on the above allowable soils bearing pressurcs for supporting the proposed second story to be added onto the existing house. It'thc existing housc footings arc not wide cnough to carry the added loads, the fcoGngs of the existing house should be widened by installing dowel bars into the footings, placing �ono::s�?inal bars a. d pouring new concrcte. The design of widened footings of the existing house should be evaluated and pertormcd by a structural cngineer. A onc-third increase in the ubove rccommended allowable soil bearing pressums may be used when considering short-term, transitory, wind or seismic loads. For footing foundations designed and constructed per rccommendations above, we estimate that the maximum toWl post- construction setUcment of thc buildings should be 3/4 inch or Iess and the differcntial settlement across building width should tx� 1/2 inch or Icss. LIU & ASSOCIATES, INC. �� . i �� '