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.� <br />� <br />�� <br />� <br />� <br />� <br />� <br />.� <br />� <br />{�J <br />� <br />� <br />� <br />� <br />� <br />�� <br />L_J <br />�� <br />403.3 Cuntinued. <br />prnaedure sha11 be <br />being required as <br />mot°e defir�it�ly. <br />defects diseovered <br />cot°rective actions <br />4a0-3 <br />a� approved by th� Engineer, with special method� <br />he deems neQea�ar°y tm check out suspectsd defeat� <br />The Contractor shall inform the Engineer of any <br />and the Engineer wilY prescribe the required <br />or order rejection and prompt remaval frc,m the site. <br />Immediately before place�ne[�t� the joint surfaces of eaeh pipe ssa�ion <br />�nd fitting shall be inspected for the presenae of foreign matter, <br />eoatia�g blisters, rough edges or proje�ciions, and any imperfectiiona <br />sa detscted shall be �orrectc�d by clean�ng, trimming, or repair as <br />need ed . <br />A11 pipe shall b� layed u�ing gPade boards, furnished and set by the <br />Con�raetor aecording ta the grade stakes established by the En�a.neer or <br />his representative. rla pipe �hall be laid unless �here is a minimum of <br />four �rade boards set to check the praper grade amd alignwent ahead. <br />The Contractor ahall provide and use a s�uitable 6rade rod tn insure the <br />grope� brad.s of the pipe. Grade Boards shall be no mare than 25 feet <br />apart. The Cr�r�tractor may ugs laser equipment in lieu of grade boards <br />and.string� to set pips grade and alignment. However, the Contraator <br />shall cheek tihe grade� at a�'requency not to �xceed ]00 feet. The <br />Contractor shall provide compe�ent workmen to oPPrate tha laser <br />eguipment. <br />At the tir�e of pipQ place�nent, the bedding conditions shall be such as <br />to provide uniforn and continuous support for the pipe bet�reen bell <br />holes. Bell holes shall he excavated as necessar°}� to oalte the aoint <br />conn�ctions, but they sh•.11 be no larger than wauld be adequate. tIo <br />pipe �aterial �tlall be laid in water nor trhen the trench or beddir:g <br />conditions a�^e othercri�e �ansuitable or improper. Unless ottierwise <br />permitted by the En�ineer, bell and spigot pipe �hall be laid with tt�e <br />bell enas facin�; up�rade and the layin� shall start at th.e dorin�rade <br />end and proceed up�;rade. <br />When placec►ent or handling precautions pxove inadequate, in the <br />Engineer's opinion, t:he Contractor shall provide anc] fns�all suitable <br />plu�s or caps eY'fect3vely closin� the open ends of each pipe section <br />before it is lowered into laying position� and they sha11 reoain �c <br />covered until reooval is nece�sary for conn�ction of an adjoining unit. <br />As each lenBth of bell nnd spiEot pipe is plaQed in laying position, <br />the spi�;ot end shall be centered ir� the bell and the pi�e forced home <br />and brought to correct line 4nd �rad�. The pipe shall be secured in <br />place with appraved bac�;fill material, �hich shali be thorouEhly <br />compacted around the pi.pe� as described in SBetion 302.7. The joint <br />areas �hall remain expo3ed and precautians shall be �aken to prevent <br />the soil from enteriri� the jaint sp�ce, until the joint seal is <br />�ffected. <br />1•lhenever er.i�tin� utility st;ruc�tures Ar branch conneetions leadin� to <br />raain seNers or to main drain3, or ottier conduits, ducts, pipe9, or <br />�tr�uctures present ob�truetions to the �rade and alignment of the pipe, <br />they shall be perdanently supported, re�oved, relocated or <br />reconstructed b}� the Contractor• involved. In those instances where <br />tt�ei.r relocztion or� reconstruction i3 iclpractical, � deviation f'rora <br />