ABSTRACT
NOTES The rates assume the most efficient items of plant (excavator) and are optimum rates assuming continuous output with no delays caused by other operations or works. Ground conditions are assumed to be good easily worked soil with no abnormal conditions that would affect outputs and consistency of work. Multiplier Table for labour and plant for various site conditions for working: out of sequence x 2.75 (minimum) in hard clay x 1.75 to 2.00 in running sand x 2.75 (minimum) in broken rock x 2.75 to 3.50 below water table x 2.00 (minimum) RESOURCES - LABOUR Gullies gang 1 chargehand pipelayer (skill rate 4) - 50% of time 7.14 1 skilled operative (skill rate 4) 13.32 2 unskilled operatives (general) 24.88 1 plant operator (skill rate 3) 16.19 Total Gang Rate / Hour £ 61.53 French/rubble drains, ditches and trenches gang; ducts and metal culverts gang 1 chargehand pipelayer (skill rate 4) - 50% of time 7.14 1 skilled operative (skill rate 4) 13.32 2 unskilled operatives (general) 24.88 1 plant operator (skill rate 3) 16.19 Total Gang Rate / Hour £ 61.53 RESOURCES - PLANT Gullies 0.4 m3 hydraulic excavator 24.32 2t dumper (30% of time) 2.04 2.80 m3/min compressor, 2 tool (30% of time) 1.87 compaction plate / roller (30% of time) 0.52 2.40 m3/min road breaker (30% of time) 0.24 54mm poker vibrator (30% of time) 0.39 extra 15ft / 50m hose (30% of time) 0.08 disc saw (30% of time) 0.37 small pump (30% of time) 0.77 Total Rate / Hour £ 30.60 French/rubble drains, ditches and trenches; ducts and metal culverts 0.4m3 hydraulic backacter 24.32 2t dumper (30% of time) 2.04 disc saw (30% of time) 0.37 compaction plate / roller (30% of time) 0.87 2.80 m3/min compressor, 2 tool (30% of time) 1.87 small pump (30% of time) 0.77 Total Rate / Hour £ 30.24
Item
Gang hours
Labour £
Plant £
Material £ Unit
Total rate £
MANHOLES Brick construction Design criteria used in models: * class A engineering bricks * 215 thick walls generally; 328 thick to chambers exceeding 2.5 m deep * 225 mm plain concrete C20/20 base slab * 300 mm reinforced concrete C20/20 reducing slab * 125 mm reinforced concrete C20/20 top slab * maximum height of working chamber 2.0 m above benching * 750 x 750 access shaft * plain concrete C15/20 benching, 150 mm clay main channel longitudinally and two 100 branch channels * step irons at 300 mm centres, doubled if depth to invert exceeds 3000 mm * heavy duty manhole cover and frame 750 x 700 chamber 500 depth to invert excavation, support, backfilling and disposal - - - - - 40.00 concrete base - - - - - 107.50 brickwork chamber - - - - - 58.19 concrete cover slab - - - - - 131.25 concrete benching, main and branch channels - - - - - 105.00 step irons - - - - - - access cover and frame - - - - - 330.00 TOTAL - - - - £ 771.94 750 x 700 chamber 1000 depth to invert excavation, support, backfilling and disposal - - - - - 65.00 concrete base - - - - - 107.50 brickwork chamber - - - - - 220.11 concrete cover slab - - - - - 131.25 concrete benching and channels - - - - - 105.00 step irons - - - - - 17.25 access cover and frame - - - - - 330.00 TOTAL - - - - £ 976.11 750 x 700 chamber 1500 depth to invert excavation, support, backfilling and disposal - - - - - 92.50 concrete base - - - - - 107.50 brickwork chamber - - - - - 379.50 concrete cover slab - - - - - 131.25 concrete benching and channels - - - - - 105.00 step irons - - - - - 28.75 access cover and frame - - - - - 330.00 TOTAL - - - - £ 1174.50 900 x 700 chamber 500 depth to invert excavation, support, backfilling and disposal - - - - - 45.00 concrete base - - - - - 111.25 brickwork chamber - - - - - 64.52 concrete cover slab - - - - - 145.00 concrete benching and channels - - - - - 118.75 step irons - - - - - - access cover and frame - - - - - 330.00 TOTAL - - - - £ 814.51
Item
Gang hours
Labour £
Plant £
Material £ Unit
Total rate £
900 x 700 chamber 1000 depth to invert excavation, support, backfilling and disposal - - - - - 75.00 concrete base - - - - - 111.25 brickwork chamber - - - - - 237.82 concrete cover slab - - - - - 145.00 concrete benching and channels - - - - - 118.75 step irons - - - - - 17.25 access cover and frame - - - - - 330.00 TOTAL - - - - £ 1035.07 900 x 700 chamber 1500 depth to invert excavation, support, backfilling and disposal - - - - - 105.00 concrete base - - - - - 111.25 brickwork chamber - - - - - 411.13 concrete cover slab - - - - - 145.00 concrete benching and channels - - - - - 118.75 step irons - - - - - 28.75 access cover and frame - - - - - 330.00 TOTAL - - - - £ 1249.88 1050 x 700 chamber 1500 depth to invert excavation, support, backfilling and disposal - - - - - 113.75 concrete base - - - - - 115.00 brickwork chamber - - - - - 441.49 concrete cover slab - - - - - 157.50 concrete benching and channels - - - - - 133.75 step irons - - - - - 28.75 access cover and frame - - - - - 330.00 TOTAL - - - - £ 1320.24 1050 x 700 chamber 2500 depth to invert excavation, support, backfilling and disposal - - - - - 192.50 concrete base - - - - - 115.00 brickwork chamber - - - - - 813.39 concrete cover slab - - - - - 157.50 concrete benching and channels - - - - - 133.75 step irons - - - - - 46.00 access cover and frame - - - - - 330.00 TOTAL - - - - £ 1788.14 1050 x 700 chamber 3500 depth to invert excavation, support, backfilling and disposal - - - - - 281.25 concrete base - - - - - 115.00 brickwork chamber - - - - - 852.01 access shaft - - - - - 234.03 reducing slab - - - - - 176.25 concrete cover slab - - - - - 106.25 concrete benching and channels - - - - - 133.75 step irons - - - - - 92.00 access cover and frame - - - - - 330.00 TOTAL - - - - £ 2320.54 1350 x 700 chamber 2500 depth to invert excavation, support, backfilling and disposal - - - - - 235.00 concrete base - - - - - 127.50 brickwork chamber - - - - - 946.22 concrete cover slab - - - - - 190.00 concrete benching and channels - - - - - 168.75 step irons - - - - - 46.00 access cover and frame - - - - - 330.00 TOTAL - - - - £ 2043.47
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Labour £
Plant £
Material £ Unit
Total rate £
MANHOLES – cont’d Brick construction – cont’d 1350 x 700 chamber 3500 depth to invert excavation, support, backfilling and disposal - - - - - 343.75 concrete base - - - - - 127.50 brickwork chamber - - - - - 942.42 access shaft - - - - - 234.03 reducing slab - - - - - 203.75 concrete cover slab - - - - - 106.25 concrete benching and channels - - - - - 168.75 step irons - - - - - 92.00 access cover and frame - - - - - 330.00 TOTAL - - - - £ 2548.45 1350 x 700 chamber 4500 depth to invert excavation, support, backfilling and disposal - - - - - 461.25 concrete base - - - - - 127.50 brickwork chamber - - - - - 942.42 access shaft - - - - - 562.92 reducing slab - - - - - 203.75 concrete cover slab - - - - - 106.25 concrete benching and channels - - - - - 168.75 step irons - - - - - 172.50 access cover and frame - - - - - 330.00 TOTAL - - - - £ 3075.35 Precast concrete construction Design criteria used in models: * circular shafts * 150 mm plain concrete C15/20 surround * 225 mm plain concrete C20/20 base slab * precast reducing slab * precast top slab * maximum height of working chamber 2.0 m above benching * 750 mm diameter access shaft * plain concrete C15/20 benching, 150 mm clay main channel longitudinally and two 100 branch channels * step irons at 300 mm centres, doubled if depth to invert exceeds 3000 mm * heavy duty manhole cover and frame * in manholes over 6 m deep, landings at maximum intervals 675 diameter x 500 depth to invert excavation, support, backfilling and disposal - - - - - 30.00 concrete base - - - - - 45.00 main chamber rings - - - - - 21.60 cover slab - - - - - 85.20 concrete benching and channels - - - - - 58.75 concrete surround - - - - - 46.25 step irons - - - - - - access cover and frame - - - - - 330.00 TOTAL - - - - £ 616.80
Item
Gang hours
Labour £
Plant £
Material £ Unit
Total rate £
675 diameter x 750 depth to invert excavation, support, backfilling and disposal - - - - - 40.00 concrete base - - - - - 45.00 main chamber rings - - - - - 49.20 cover slab - - - - - 85.20 concrete benching and channels - - - - - 58.75 concrete surround - - - - - 67.50 step irons - - - - - - access cover and frame - - - - - 330.00 TOTAL - - - - £ 675.65 675 diameter x 1000 depth to invert excavation, support, backfilling and disposal - - - - - 48.75 concrete base - - - - - 45.00 main chamber rings - - - - - 78.00 cover slab - - - - - 85.20 concrete benching and channels - - - - - 58.75 step irons - - - - - - concrete surround - - - - - 90.00 access cover and frame - - - - - 330.00 TOTAL - - - - £ 735.70 675 diameter x 1250 depth to invert excavation, support, backfilling and disposal - - - - - 57.50 concrete base - - - - - 45.00 main chamber rings - - - - - 106.80 cover slab - - - - - 85.20 concrete benching and channels - - - - - 58.75 concrete surround - - - - - 111.25 step irons - - - - - 6.90 access cover and frame - - - - - 330.00 TOTAL - - - - £ 801.40 900 diameter x 750 depth to invert excavation, support, backfilling and disposal - - - - - 57.50 concrete base - - - - - 62.50 main chamber rings - - - - - 61.20 cover slab - - - - - 103.20 concrete benching and channels - - - - - 118.75 concrete surround - - - - - 85.00 step irons - - - - - - access cover and frame - - - - - 330.00 TOTAL - - - - £ 756.90 900 diameter x 1000 depth to invert excavation, support, backfilling and disposal - - - - - 70.00 concrete base - - - - - 62.50 main chamber rings - - - - - 97.20 cover slab - - - - - 103.20 concrete benching and channels - - - - - 118.75 concrete surround - - - - - 111.25 step irons - - - - - - access cover and frame - - - - - 330.00 TOTAL - - - - £ 849.15
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Labour £
Plant £
Material £ Unit
Total rate £
MANHOLES – cont’d Precast concrete construction – cont’d 900 diameter x 1500 depth to invert excavation, support, backfilling and disposal - - - - - 100.00 concrete base - - - - - 62.50 main chamber rings - - - - - 168.00 cover slab - - - - - 103.20 concrete benching and channels - - - - - 118.75 concrete surround - - - - - 165.00 step irons - - - - - 13.80 access cover and frame - - - - - 330.00 TOTAL - - - - £ 1017.50 1200 diameter x 1500 depth to invert excavation, support, backfilling and disposal - - - - - 156.25 concrete base - - - - - 91.25 main chamber rings - - - - - 228.00 concrete benching and channels - - - - - 90.00 cover slab - - - - - 146.40 concrete surround - - - - - 216.25 step irons - - - - - 13.80 access cover and frame - - - - - 330.00 TOTAL - - - - £ 1271.95 1200 diameter x 2000 depth to invert excavation, support, backfilling and disposal - - - - - 220.00 concrete base - - - - - 91.25 main chamber rings - - - - - 320.40 cover slab - - - - - 146.40 concrete benching and channels - - - - - 90.00 concrete surround - - - - - 286.25 step irons - - - - - 26.45 access cover and frame - - - - - 330.00 TOTAL - - - - £ 1510.75 1200 diameter x 2500 depth to invert excavation, support, backfilling and disposal - - - - - 270.00 concrete base - - - - - 91.25 main chamber rings - - - - - 416.40 cover slab - - - - - 146.40 concrete benching and channels - - - - - 90.00 concrete surround - - - - - 356.25 step irons - - - - - 33.35 access cover and frame - - - - - 330.00 TOTAL - - - - £ 1733.65 1200 diameter x 3000 depth to invert excavation, support, backfilling and disposal - - - - - 347.50 concrete base - - - - - 91.25 main chamber rings - - - - - 513.60 cover slab - - - - - 146.40 concrete benching and channels - - - - - 90.00 concrete surround - - - - - 427.50 step irons - - - - - 94.30 access cover and frame - - - - - 330.00 TOTAL - - - - £ 2040.55
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Labour £
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1800 diameter x 1500 depth to invert excavation, support, backfilling and disposal - - - - - 285.00 concrete base - - - - - 160.00 main chamber rings - - - - - 357.60 cover slab - - - - - 253.20 concrete benching and channels - - - - - 138.75 concrete surround - - - - - 302.50 step irons - - - - - 13.80 access cover and frame - - - - - 330.00 TOTAL - - - - £ 1840.85 1800 diameter x 2000 depth to invert excavation, support, backfilling and disposal - - - - - 400.00 concrete base - - - - - 160.00 main chamber rings - - - - - 512.40 cover slab - - - - - 253.20 concrete benching and channels - - - - - 138.75 concrete surround - - - - - 402.50 step irons - - - - - 26.45 access cover and frame - - - - - 330.00 TOTAL - - - - £ 2223.30 1800 diameter x 2500 depth to invert excavation, support, backfilling and disposal - - - - - 487.50 concrete base - - - - - 160.00 main chamber rings - - - - - 666.00 cover slab - - - - - 253.20 concrete benching and channels - - - - - 138.75 concrete surround - - - - - 502.50 step irons - - - - - 33.35 access cover and frame - - - - - 330.00 TOTAL - - - - £ 2571.30 1800 diameter x 3000 depth to invert excavation, suport, backfilling and disposal - - - - - 627.50 concrete base - - - - - 160.00 main chamber rings - - - - - 820.80 cover slab - - - - - 253.20 concrete surround - - - - - 601.25 concrete benching and channels - - - - - 138.75 step irons - - - - - 94.30 access cover and frame - - - - - 330.00 TOTAL - - - - £ 3025.80 1800 diameter x 3500 depth to invert excavation, support, backfilling and disposal - - - - - 718.75 concrete base - - - - - 160.00 access shaft - - - - - 97.20 main chamber rings - - - - - 679.20 reducing slab - - - - - 271.20 cover slab - - - - - 103.20 concrete benching and channels - - - - - 138.75 concrete surround - - - - - 623.75 step irons - - - - - 120.75 access cover and frame - - - - - 330.00 TOTAL - - - - £ 3242.80
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Labour £
Plant £
Material £ Unit
Total rate £
MANHOLES – cont’d Precast concrete construction – cont’d 1800 diameter x 4000 depth to invert excavation, support, backfilling and disposal - - - - - 872.50 concrete base - - - - - 160.00 access shaft - - - - - 168.00 main chamber rings - - - - - 679.20 reducing slab - - - - - 271.20 cover slab - - - - - 103.20 concrete benching and channels - - - - - 138.75 concrete surround - - - - - 680.00 step irons - - - - - 134.55 access cover and frame - - - - - 330.00 TOTAL - - - - £ 3537.40 2400 diameter x 1500 depth to invert excavation, support, backfilling and disposal - - - - - 453.75 concrete base - - - - - 247.50 main chamber rings - - - - - 686.40 cover slab - - - - - 740.40 concrete benching and channels - - - - - 201.25 concrete surround - - - - - 391.25 step irons - - - - - 13.80 access cover and frame - - - - - 330.00 TOTAL - - - - £ 3064.35 2400 diameter x 3000 depth to invert excavation, support, backfilling and disposal - - - - - 985.00 concrete base - - - - - 247.50 main chamber rings - - - - - 1594.80 cover slab - - - - - 740.40 concrete benching and channels - - - - - 201.25 concrete surround - - - - - 775.00 step irons - - - - - 94.30 access cover and frame - - - - - 330.00 TOTAL - - - - £ 4968.25 2400 diameter x 4500 depth to invert excavation, support, backfilling and disposal - - - - - 1517.50 concrete base - - - - - 247.50 access shaft - - - - - 238.80 main chamber rings - - - - - 1318.80 reducing slab - - - - - 742.80 cover slab - - - - - 103.20 concrete benching and channels - - - - - 201.25 concrete surround - - - - - 887.50 step irons - - - - - 161.00 access cover and frame - - - - - 330.00 TOTAL - - - - £ 5748.35 2700 diameter x 1500 depth to invert excavation, support, backfilling and disposal - - - - - 553.75 concrete base - - - - - 300.00 main chamber rings - - - - - 787.20 cover slab - - - - - 926.40 concrete benching and channels - - - - - 237.50 concrete surround - - - - - 436.25 step irons - - - - - 13.80 access cover and frame - - - - - 330.00 TOTAL - - - - £ 3584.90
Item
Gang hours
Labour £
Plant £
Material £ Unit
Total rate £
2700 diameter x 3000 depth to invert excavation, support, backfilling and disposal - - - - - 1197.50 concrete base - - - - - 300.00 main chamber rings - - - - - 1851.60 cover slab - - - - - 926.40 concrete benching and channels - - - - - 237.50 concrete surround - - - - - 863.75 step irons - - - - - 94.30 access cover and frame - - - - - 330.00 TOTAL - - - - £ 5801.05 2700 diameter x 4500 depth to invert excavation, support, backfilling and disposal - - - - - 1840.00 concrete base - - - - - 300.00 access shaft - - - - - 238.80 main chamber rings - - - - - 1531.20 reducing slab - - - - - 920.40 cover slab - - - - - 103.20 concrete benching and channels - - - - - 237.50 concrete surround - - - - - 965.00 step irons - - - - - 161.00 access cover and frame - - - - - 330.00 TOTAL - - - - £ 6627.10 3000 diameter x 3000 depth to invert excavation, support, backfilling and disposal - - - - - 1443.75 concrete base - - - - - 358.75 main chamber rings - - - - - 2478.00 cover slab - - - - - 1167.60 concrete benching and channels - - - - - 256.25 concrete surround - - - - - 958.75 step irons - - - - - 94.30 access cover and frame - - - - - 330.00 TOTAL - - - - £ 7087.40 3000 diameter x 4500 depth to invert excavation, support, backfilling and disposal - - - - - 2217.50 concrete base - - - - - 358.75 access shaft - - - - - 238.80 main chamber rings - - - - - 2049.60 reducing slab - - - - - 1053.60 cover slab - - - - - 103.20 concrete benching and channels - - - - - 256.25 concrete surround - - - - - 1045.00 step irons - - - - - 161.00 access cover and frame - - - - - 330.00 TOTAL - - - - £ 7813.70 3000 diameter x 6000 depth to invert excavation, support, backfilling and disposal - - - - - 3283.75 concrete base - - - - - 358.75 access shaft - - - - - 452.40 main chamber rings - - - - - 2049.60 reducing slab - - - - - 1053.60 cover slab - - - - - 103.20 concrete benching and channels - - - - - 256.25 concrete surround - - - - - 1218.75 step irons - - - - - 228.85 access cover and frame - - - - - 330.00 TOTAL - - - - £ 9335.15
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Total rate £
MANHOLES – cont’d BACKDROPS TO MANHOLES Clayware vertical pipe complete with rest bend at base and tumbling bay junction to main drain complete with stopper; concrete grade C20 surround, 150 mm thick; additional excavation and disposal 100 pipe 1.15 m to invert - - - - nr 105.00 2.15 m to invert - - - - nr 134.09 3.15 m to invert - - - - nr 161.92 4.15 m to invert - - - - nr 192.28 150 pipe 1.15 m to invert - - - - nr 161.92 2.15 m to invert - - - - nr 194.81 3.15 m to invert - - - - nr 232.76 4.15 m to invert - - - - nr 270.71 225 pipe 1.15 m to invert - - - - nr 322.57 2.15 m to invert - - - - nr 378.24 3.15 m to invert - - - - nr 436.43 4.15 m to invert - - - - nr 497.14 GULLIES Vitrified clay; set in concrete grade C20, 150 mm thick; additional excavation and disposal Road gulley 450 mm diameter x 900 mm deep, 100 mm or 150 mm outlet; cast iron road gulley grating and frame group 4 434 x 434 mm, on Class B engineering brick seating 0.50 30.80 1.21 304.51 nr 336.52 Yard gulley (mud); trapped with rodding eye; galvanised bucket; stopper 225 mm diameter, 100 mm diameter outlet, cast iron hinged grate and frame 0.30 18.48 0.73 190.73 nr 209.94 Grease interceptors; internal access and bucket 600 x 450 mm, metal tray and lid, square hopper with horizontal inlet 0.35 21.56 0.84 1009.14 nr 1031.55 Precast concrete; set in concrete grade C20, 150 mm thick; additional excavation and disposal Road gulley; trapped with rodding eye; galvanised bucket; stopper 450 mm diameter x 750 mm deep, cast iron road gulley grating and frame group 4, 434 x 434 mm, on Class B engineering brick seating 0.50 30.80 1.21 194.30 nr 226.31 450 mm diameter x 900 mm deep, cast iron road gulley grating and frame group 4, 434 x 434 mm, on Class B engineering brick seating 0.54 33.27 1.31 195.50 nr 230.07 450 mm diameter x 1050 mm deep, cast iron road gulley grating and frame group 4, 434 x 434 mm, on Class B engineering brick seating 0.58 35.73 1.40 198.01 nr 235.15
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FRENCH DRAINS, RUBBLE DRAINS, DITCHES The rates assume the most efficient items of plant (excavator) and are optimum rates assuming continuous output with no delays caused by other operations or works. Ground conditions are assumed to be good easily worked soil with no abnormal conditions that would affect outputs and consistency of work. Multiplier Table for labour and plant for various site conditions for working: out of sequence x 2.75 (minimum) in hard clay x 1.75 to 2.00 in running sand x 2.75 (minimum) in broken rock x 2.75 to 3.50 below water table x 2.00 (minimum) Excavation of trenches for unpiped rubble drains (excluding trench support); cross-sectional area 0.25 - 0.50 m2 0.10 6.97 2.69 - m 9.66 0.50 - 0.75 m2 0.12 8.37 3.23 - m 11.59 0.75 - 1.00 m2 0.14 9.76 3.77 - m 13.53 1.00 - 1.50 m2 0.17 11.85 4.57 - m 16.43 1.50 - 2.00 m2 0.20 13.95 5.38 - m 19.32 Filling French and rubble drains with graded material graded material; 20 mm stone aggregate; 0.30 20.92 8.07 21.14 m3 50.13 broken brick/concrete rubble; 0.29 20.22 7.80 16.53 m3 44.54 Excavation of rectangular section ditches; unlined; cross-sectional area 0.25 - 0.50 m² 0.11 7.67 2.90 - m 10.57 0.50 - 0.75 m² 0.13 9.06 3.43 - m 12.49 0.75 - 1.00 m² 0.16 11.16 4.22 - m 15.37 1.00 - 1.50 m² 0.20 13.95 5.27 - m 19.22 1.50 - 2.00 m² 0.25 17.43 6.59 - m 24.02 Excavation of rectangular ditches; lined with precast concrete slabs; cross-sectional area 0.25 - 0.50 m² 0.15 10.46 4.29 11.80 m 26.55 0.50 - 0.75 m² 0.25 17.43 7.17 19.43 m 44.03 0.75 - 1.00 m² 0.36 25.10 10.32 27.72 m 63.14 1.00 - 1.50 m² 0.40 27.89 11.46 39.23 m 78.58 1.50 - 2.00 m² 0.45 31.38 12.90 55.27 m 99.55 Excavation of vee section ditches; unlined; cross-sectional area 0.25 - 0.50 m² 0.10 6.97 3.04 - m 10.02 0.50 - 0.75 m² 0.12 8.37 3.63 - m 12.00 0.75 - 1.00 m² 0.14 9.76 4.25 - m 14.02 1.00 - 1.50 m² 0.18 12.55 5.47 - m 18.02 1.50 - 2.00 m² 0.22 15.34 6.68 - m 22.02
Item
Gang hours
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Material £ Unit
Total rate £
DUCTS AND METAL CULVERTS Galvanised steel culverts; bitumen coated Sectional corrugated metal culverts, nominal internal diameter 0.5 - 1 m; 1000 mm nominal internal diameter, 1.6 mm thick not in trenches 0.15 9.24 0.64 96.55 m 106.43 in trenches, depth not exceeding 1.5 m 0.31 19.10 9.37 96.55 m 125.02 in trenches, depth 1.5 - 2 m 0.43 26.49 13.00 96.55 m 136.04 in trenches, depth 2 - 2.5 m 0.51 31.42 15.41 96.55 m 143.39 in trenches, depth 2.5 - 3 m 0.60 36.96 18.14 96.55 m 151.66 Sectional corrugated metal culverts, nominal internal diameter exceeding 1.5 m; 1600 mm nominal internal diameter, 1.6 mm thick not in trenches 0.21 12.94 0.90 180.76 m 194.60 in trenches, depth 1.5 - 2 m 0.44 27.11 13.31 180.76 m 221.17 in trenches, depth 2 - 2.5 m 0.56 34.50 16.93 180.76 m 232.19 in trenches, depth 2.5 - 3 m 0.68 41.89 20.56 180.76 m 243.21 in trenches, depth 3 -3.5 m 0.82 50.52 24.81 180.76 m 256.09 Sectional corrugated metal culverts, nominal internal diameter exceeding 1.5 m; 2000 mm nominal internal diameter, 1.6 mm thick not in trenches 0.26 16.02 1.12 386.54 m 403.68 in trenches, depth 2 - 2.5 m 0.46 28.34 13.92 386.54 m 428.81 in trenches, depth 2.5 - 3 m 0.60 36.96 18.14 386.54 m 441.65 in trenches, depth 3 - 3.5 m 0.75 46.21 22.67 386.54 m 455.42 in trenches, depth 3.5 - 4 m 0.93 57.29 28.13 386.54 m 471.97 Sectional corrugated metal culverts, nominal internal diameter exceeding 1.5 m; 2200 mm nominal internal diameter, 1.6 mm thick not in trenches 0.33 20.33 1.42 435.75 m 457.50 in trenches, depth 2.5 - 3 m 0.64 39.43 19.35 435.75 m 494.53 in trenches, depth 3 - 3.5 m 0.77 47.44 23.29 435.75 m 506.48 in trenches, depth 3.5 - 4 m 1.02 62.84 30.86 435.75 m 529.45 in trenches, depth exceeding 4 m 1.32 81.32 39.92 435.75 m 556.99 OTHER PIPEWORK ANCILLARIES Notes Refer to Section G (Concrete and concrete ancillaries) for costs relevant to the construction of Headwall Structure. Build Ends in Connections to existing manholes and other chambers, pipe bore 150 mm diameter 0.60 41.84 3.03 9.65 nr 54.52 225 mm diameter 0.95 66.24 4.79 17.96 nr 88.99 300 mm diameter 1.25 87.16 6.32 27.26 nr 120.74 375 mm diameter 1.45 101.10 7.33 35.92 nr 144.35 450 mm diameter 1.75 107.81 52.30 45.19 nr 205.30
