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� <br />Intrecorp <br />July 16, 1998 <br />c.> <br />E-3592-620 <br />Paps 8 <br />Structural fill is defined as comp2.cted flll placed under build(ngs, roadways, slabs, <br />pavements, or other load-bearing areas. Structural fill under floor atabs and footinps <br />ahould be placed in horizontal lifts not exceeding twelve (12) inches in looae thickness and <br />compacted to a minimum of 90 percent of its labaratory maximum dry density determined <br />in accordanca with ASTM Test Designation D-1557 (Modified Proctor). The flll materials <br />are being placed at or near their optinum moisture content. Fill under pavements and <br />walks should also be placed in horizontal lifts and compacted to 90 percent of maximum <br />density except far the top twelve (12) �nches which shouid be compacted to 95 percent <br />if maximum density. <br />D� •ing dry weather, most soils which are compactibls and non-organic can be uaed as <br />stn ctural fill. If the on-site soil is exposed to moisture and cannot be adequately <br />cor.ipacted then it may be necessary to import a soil which can be compacted. Durinq <br />dry weather, non-organic compactible soil with a maximum grain size of six inches can <br />be usect. Fill fer use during wet weather should consist of a fairly well yraded flranular <br />material having a maximum grain size of six inches and no more than 5 percent flnes <br />passing the No. 200 sieve basad on the minus 3/4inch fraction. A continpency in the <br />earthwork budget should be included for this possibility. <br />�.� .i. .. <br />The foltowing information is provided solely as a service to our client. Under no <br />circumstances should this information be interpreted to mean that ECI is assuming <br />responsibility for construction site safety or the contractor's activities; such responsibi8ty <br />is not being implied a�d shoutd not be inferred. <br />In no case should excavation slopes be greater than the I(mits specified in local, state and <br />Federal safety regulations. The structural fill undertyiny the site would be classifted as <br />Type C by OSHA. Temporary cuts greater than four feet in height in Type C soils should <br />be sloped at an inalination of 1.5H:1 V. If slopes of this inclination, or flatter, cannot be <br />constructed, temporary shoring may be necessary. <br />E W+ Con�wtann. 4rc. <br />� <br />