rate contract of building materials for fy 2020-21 for grampanchayat kohaka , tah . korchi , material items : , sand , murum , bricks , cement grade - 53 , metal 80mm hand , metal 40mm kreshar , metal 30mm kreshar , metal 20mm kreshar , metal 12mm kreshar , metal 10mm kreshar , steel 18mm , steel 16mm , steet 12mm , steel 10mm , steel 8mm , binding wire ( centring wire ) , pvc pipe 110mm , pvc pipe 90mm , paving blocks , tiles ( ceramic ) , vertified tiles 2x4 , iron sheet , iron angle , nails , iron door with frame and palla , iron window with frame and palla , chicken mesh net , water proofing liquid , water proofing polymer , asian paints , mixture machine with operator , jcb with operator , tractor with driver and labours , tractor water tanker with driver