Laserfiche WebLink
Page 12 r 382-063-00 <br /> 0. <br /> excavation should extend at least 8 feet beyond the exterior <br /> foundations . <br /> The material directly beneath the exterior <br /> foundations should be removed and replaced to a depth of at least <br /> 12 feet. Width of the trench should extend 1 foot laterally <br /> beyond the footing outline -f,or each foot of excavation depth <br /> below the design bottom of the footing,. in other words , for a <br /> footing width. of 18 inches, a trench width of 10-1/2 feet would <br /> M" be necessary at. 9 feet below the bottom of this footing . Upon <br /> completion of. excavation of the trench, the soils engineer should: <br /> examine consistency and quality of existing material below t.h e <br /> bottom of the trench in order to determine the need for <br /> additional excavations -prior to placing the fill . Upon <br /> completion of the excavation, the trench may be backfilled with a <br /> 3/4- inch .maximum aggregate to 3 feet below the lowest adjacent <br /> grade . The aggregate should be end-dumped into the excavation <br /> which should achieve adequate compaction to support footings . <br /> Alternatively , the t.rench may be backfilled to designed <br /> elevations with engineered fill compacted under controlled <br /> ; conditions . <br /> A <br /> It is recommended that the building be supported by <br /> ::.1, conventional spread or continuous footings. Depth of foundations <br /> should be at least 36 inches below the lowest adjacent finished <br /> grade. At this depth the allowable bearing pressure should not <br /> exceed 1 , 500 psf due to dead load , and 2 , 000 psf for <br /> The "Fbtjnrkdbn Efl_rjineers, bic. <br />