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<br />I' <br />I <br /> <br />II <br />I) <br />II <br />11 <br />II <br />I <br /> <br />Ij <br />I) <br />II <br /> <br />w .I <br /> <br />~ <br />~ <br />~ <br />I <br />".1 <br /> <br />~ <br />~ <br />, <br />, <br />,I <br />~ <br /> <br />600-1 <br /> <br />600 - TijENCH EXCAVATION AND BACKFILL FOR UTILITIES <br /> <br />601.000 GENEBAL <br /> <br />This specification covers trench excavation" special pipe <br />foundations, pipe bedding and trench backfill. All trenching <br />work will be done in accordance with O.S.B.A. ~egulations. <br /> <br />602.000 MATERIALS <br /> <br />602.100 Granular Material~ <br /> <br />Granular materials furnished for foundation, bedding, backfill, <br />or other purposes as may be ~pecified shall consist of any <br />natural or synthetic mineral aggregate such as sand, gravel, <br />crushed rock, crushed stone, or slag, that shall be so graded as <br />to meet the gradation requirements specified herein for each <br />particular use. <br /> <br />602.101 ~ranular Material G~adation Classificatio~~ <br /> <br />Granular materials furnished for use in foundation, bedding, <br />encasement, or backfill i~ pipe construction shall conform to <br />the following requirements: <br /> <br />Percent Passing <br />si,ve size <br /> <br />3 inch <br />2 inch <br />1 inch <br />3/4 <br />3/8 <br />'4 <br />:fI10 <br />#40 <br />#200 <br /> <br />Foundat'ion <br /> <br />MATERIALS USE DESIGNATION <br />Beddina Backfill <br /> <br />100 100 100 <br />85-100 90-100 <br />30-60 50-gO <br />0-10 35-80 35-100 <br /> 20-65 20-100 <br /> 0-50 0-50 <br /> 0-15 0-35 <br /> <br />602.102 Gran~lar Mater~al Use Designations <br /> <br />Granular materials provided for Foundation, Bedding or Backfill <br />use as required by the CONTRACTOR in pipe construction, either <br />,as p~rt of the pipe item work unit or as a separate Contract <br />, I~em, shall be classified as to Use in accordance with the <br />. following: <br /> <br />JA~JAL USE DESIGNATION <br /> <br />ZONE DESIGNATION <br /> <br />Placed below the bottom of pipe <br />grade as placement for unsuitable <br />or unstable soils, to achieve <br />better foundation support. . <br /> <br />G~anular ~oundation <br /> <br />- - - <br />