ABSTRACT
Clay road gully; 450mm diameter × 900mm deep – – – 334.80 nr 334.80 C.I. gully grating and frame; 434×434mm to clay – – – 210.28 nr 210.28 Clay yard gully; 225mm diameter; including grating – – – 306.31 nr 306.31 Clay grease interceptor; 600×450mm – – – 1706.02 nr 1706.02
Culvert; Corrugated steel 1.6mm thick; 1000mm diameter – – – 118.38 m 118.38 2.0mm thick; 1600mm diameter – – – 188.74 m 188.74 2.0mm thick; 2000mm diameter – – – 407.91 m 407.91 2.0mm thick; 2200mm diameter – – – 460.27 m 460.27
hours £ £ £ rate £
RESOURCES – PLANT Gullies
0.4m3 hydraulic excavator 43.25 2t dumper (30% of time) 2.40 2.80m3/min compressor, 2 tool (30% of time) 3.03 compaction plate/roller (30% of time) 0.89 2.40m3/min road breaker (30% of time) 1.38 54mm poker vibrator (30% of time) 0.43 extra 15ft/50m hose (30% of time) 0.10 disc saw (30% of time) 0.27 small pump (30% of time) 1.28
Total Rate/Hour £ 53.01 French/rubble drains, ditches and trenches; ducts and metal culverts
0.4m3 hydraulic backacter 43.25 2t dumper (30% of time) 2.40 disc saw (30% of time) 0.27 compaction plate/roller (30% of time) 2.02 2.80m3/min compressor, 2 tool (30% of time) 3.03 small pump (30% of time) 1.28
Total Rate/Hour £ 52.24
MANHOLES
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 soil with no abnormal conditions that would affect outputs and consistency of work. Multiplier Factor Table for Labour and Plant to reflect various site conditions requiring additonal works
out of sequence with other works × 2.75minimum in hard clay × 1.75-2.00 in running sand × 2.75minimum in broken rock × 2.75-3.50 below water table × 2.00minimum
hours £ £ £ rate £
MANHOLES – cont Brick construction Design criteria used in models:
class A engineering bricks 215 thick walls generally; 328 thick to chambers exceeding 2.5m deep 225 plain concrete C20/20 base slab 300 reinforced concrete C20/20 reducing slab 125 reinforced concrete C20/20 top slab maximum height of working chamber 2.0m above benching 750× 750 access shaft plain concrete C15/20 benching, 150 clay main channel longitudinally and two 100 branch channels step irons at 300mm centres, doubled if depth to invert exceeds 3000mm heavy duty manhole cover and frame
750×700 chamber 500 depth to invert excavation, support, backfilling and disposal 0.28 16.89 12.37 – nr 29.26 concrete base 0.41 6.45 2.03 22.32 nr 30.80 brickwork chamber 3.81 65.38 7.24 69.08 nr 141.70 concrete cover slab 2.16 37.27 27.37 95.40 nr 160.04 concrete benching, main and branch channels 4.25 68.82 14.20 157.61 nr 240.63 step irons 0.22 3.60 0.40 28.68 nr 32.68 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 12.57 221.93 66.08 503.92 nr 791.93 750×700 chamber 1000 depth to invert
excavation, support, backfilling and disposal 0.57 33.35 24.57 – nr 57.92 concrete base 0.41 6.45 2.03 22.32 nr 30.80 brickwork chamber 7.63 130.76 14.47 138.16 nr 283.39 concrete cover slab 2.16 37.27 27.37 95.40 nr 160.04 concrete benching, main and branch channels 4.25 68.82 14.20 157.61 nr 240.63 step irons 0.33 5.40 0.60 43.02 nr 49.02 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 16.79 305.57 85.71 587.34 nr 978.62 750×700 chamber 1500 depth to invert
excavation, support, backfilling and disposal 0.84 49.73 36.70 – nr 86.43 concrete base 0.41 6.45 2.03 22.32 nr 30.80 brickwork chamber 12.18 209.23 23.14 207.23 nr 439.60 concrete cover slab 2.16 37.27 27.37 95.40 nr 160.04 concrete benching, main and branch channels 4.25 68.82 14.20 157.61 nr 240.63 step irons 0.44 7.20 0.80 57.36 nr 65.36 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 21.72 402.22 106.71 670.75 nr 1179.68 900×700 chamber 500 depth to invert
excavation, support, backfilling and disposal 0.34 19.82 14.11 – nr 33.93 concrete base 0.47 7.52 2.37 26.04 nr 35.93 brickwork chamber 4.21 72.14 7.98 76.22 nr 156.34
hours £ £ £ rate £
concrete cover slab 2.16 37.27 27.37 95.40 nr 160.04 concrete benching, main and branch channels 4.25 68.82 14.20 157.61 nr 240.63 step irons 0.11 1.80 0.20 14.34 nr 16.34 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 12.98 230.89 68.70 500.44 nr 800.03 900×700 chamber 1000 depth to invert
excavation, support, backfilling and disposal 0.67 39.65 28.23 – nr 67.88 concrete base 0.47 7.52 2.37 26.04 nr 35.93 brickwork chamber 8.42 144.29 15.97 152.45 nr 312.71 concrete cover slab 2.16 37.27 27.37 95.40 nr 160.04 concrete benching, main and branch channels 4.25 68.82 14.20 157.61 nr 240.63 step irons 0.33 5.40 0.60 43.02 nr 49.02 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 17.74 326.47 91.21 605.35 nr 1023.03 900×700 chamber 1500 depth to invert
excavation, support, backfilling and disposal 1.00 59.03 42.16 – nr 101.19 concrete base 0.47 7.52 2.37 26.04 nr 35.93 brickwork chamber 13.44 230.88 25.54 228.67 nr 485.09 concrete cover slab 2.16 37.27 27.37 95.40 nr 160.04 concrete benching, main and branch channels 4.25 68.82 14.20 157.61 nr 240.63 step irons 0.44 7.20 0.80 57.36 nr 65.36 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 23.20 434.24 114.91 695.91 nr 1245.06 1050×700 chamber 1500 depth to invert
excavation, support, backfilling and disposal 1.94 114.27 79.52 – nr 193.79 concrete base 0.57 9.13 2.88 31.61 nr 43.62 brickwork chamber 14.70 252.53 27.93 250.11 nr 530.57 concrete cover slab 2.52 43.48 31.90 101.95 nr 177.33 concrete benching, main and branch channels 5.85 94.47 21.49 162.90 nr 278.86 step irons 0.88 14.40 1.60 114.72 nr 130.72 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 27.90 551.80 167.79 792.12 nr 1511.71 1050×700 chamber 2500 depth to invert
excavation, support, backfilling and disposal 1.98 120.27 98.27 – nr 218.54 concrete base 0.57 9.13 2.88 31.61 nr 43.62 brickwork chamber and access shaft (700×700) 35.47 609.23 67.39 578.62 nr 1255.24 concrete cover slab 2.52 43.48 31.90 101.95 nr 177.33 concrete reducing slab 2.80 48.31 35.47 128.36 nr 212.14 concrete benching, main and branch channels 5.85 94.47 21.49 162.90 nr 278.86 step irons 0.88 14.40 1.60 114.72 nr 130.72 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 48.71 914.50 226.00 1120.63 nr 2261.13 1050×700 chamber 3500 depth to invert
excavation, support, backfilling and disposal 2.82 175.82 195.56 – nr 371.38 concrete base 0.57 9.13 2.88 31.61 nr 43.62 brickwork chamber and access shaft (700×700) 45.57 782.85 86.59 745.36 nr 1614.80 concrete reducing slab 2.80 48.31 35.47 128.36 nr 212.14 concrete cover slab 2.52 43.48 31.90 101.95 nr 177.33 concrete benching, main and branch channels 5.85 94.47 21.49 162.90 nr 278.86 step irons 1.21 19.80 2.20 157.74 nr 179.74 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 59.98 1149.07 343.09 1330.39 nr 2822.55
hours £ £ £ rate £
MANHOLES – cont
Brick construction – cont 1350×700 chamber 2500 depth to invertSTOP
excavation, support, backfilling and disposal 2.45 144.65 97.47 – nr 242.12 concrete base 0.70 11.28 3.56 39.06 nr 53.90 brickwork chamber and access shaft (700×700) 41.55 713.66 78.95 677.81 nr 1470.42 concrete reducing slab 2.80 48.31 35.47 128.36 nr 212.14 concrete cover slab 2.80 48.31 35.47 126.74 nr 210.52 concrete benching, main and branch channels 7.00 112.91 26.98 169.03 nr 308.92 step irons 0.88 14.40 1.60 114.72 nr 130.72 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 56.82 1068.73 246.50 1258.19 nr 2573.42 1350×700 chamber 3500 depth to invert
excavation, support, backfilling and disposal 3.59 222.59 235.98 – nr 458.57 concrete base 0.70 11.28 3.56 39.06 nr 53.90 brickwork chamber and access shaft (700×700) 54.86 942.94 104.33 873.14 nr 1920.41 concrete reducing slab 2.80 48.31 35.47 128.36 nr 212.14 concrete cover slab 2.80 48.31 35.47 126.74 nr 210.52 concrete benching, main and branch channels 7.00 112.91 26.98 169.03 nr 308.92 step irons 1.21 19.80 2.20 157.74 nr 179.74 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 74.40 1429.66 446.46 1624.90 nr 3501.02 1350×700 chamber 4500 depth to invert
excavation, support, backfilling and disposal 4.62 286.04 303.35 – nr 589.39 concrete base 0.70 11.28 3.56 39.06 nr 53.90 brickwork chamber and access shaft (700×700) 67.32 1157.41 128.07 1068.46 nr 2353.94 concrete reducing slab 2.80 48.31 35.47 128.36 nr 212.14 concrete cover slab 2.80 48.31 35.47 126.74 nr 210.52 concrete benching, main and branch channels 7.00 112.91 26.98 169.03 nr 308.92 step irons 1.54 25.20 2.80 200.76 nr 228.76 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 88.22 1712.98 538.17 1863.24 nr 4114.39
Precast concrete construction Design criteria used in models:
circular shafts 150 plain concrete surround 225 plain concrete C20/20 base slab precast top slab maximum height of working chamber 2.0m above benching plain concrete C15/20 benching, 150 clay main channel longitudinally and two 100 branch channels step irons at 300mm centres, doubled if depth to invert exceeds 3000mm heavy duty manhole cover and frame in manholes over 6m deep, landings at maximum intervals
hours £ £ £ rate £
675 diameter × 500 depth to invert excavation, support, backfilling and disposal 0.20 11.73 8.80 – nr 20.53 concrete base 0.26 4.30 1.36 14.87 nr 20.53 main chamber rings 1.60 27.61 20.26 24.28 nr 72.15 cover slab 1.98 33.93 23.32 56.01 nr 113.26 concrete surround 0.37 5.90 2.09 14.79 nr 22.78 concrete benching, main and branch channels 2.38 38.57 7.42 68.95 nr 114.94 step irons 0.11 1.80 0.20 14.34 nr 16.34 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 8.34 147.36 65.92 324.07 nr 537.35 675 diameter × 750 depth to invert
excavation, support, backfilling and disposal 0.30 17.14 13.00 – nr 30.14 concrete base 0.26 4.30 1.36 14.87 nr 20.53 main chamber rings 2.40 41.41 30.39 36.42 nr 108.22 cover slab 1.98 33.93 23.32 56.01 nr 113.26 concrete surround 0.55 8.85 3.13 22.18 nr 34.16 concrete benching, main and branch channels 2.38 38.57 7.42 68.95 nr 114.94 step irons 0.22 3.60 0.40 28.68 nr 32.68 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 9.53 171.32 81.49 357.94 nr 610.75 675 diameter × 1000 depth to invert
excavation, support, backfilling and disposal 0.39 23.00 17.41 – nr 40.41 concrete base 0.26 4.30 1.36 14.87 nr 20.53 main chamber rings 3.20 55.21 40.52 48.56 nr 144.29 cover slab 1.98 33.93 23.32 56.01 nr 113.26 concrete surround 0.74 11.80 4.18 29.57 nr 45.55 concrete benching, main and branch channels 2.38 38.57 7.42 68.95 nr 114.94 step irons 0.33 5.40 0.60 43.02 nr 49.02 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 10.72 195.73 97.28 391.81 nr 684.82 675 diameter × 1250 depth to invert
excavation, support, backfilling and disposal 0.49 28.87 21.80 – nr 50.67 concrete base 0.26 4.30 1.36 14.87 nr 20.53 main chamber rings 4.00 69.01 50.65 60.70 nr 180.36 cover slab 1.98 33.93 23.32 56.01 nr 113.26 concrete surround – – – – nr - concrete benching, main and branch channels 2.38 38.57 7.42 68.95 nr 114.94 step irons 0.44 7.20 0.80 57.36 nr 65.36 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 11.91 220.15 113.04 425.68 nr 758.87 900 diameter × 750 depth to invert
excavation, support, backfilling and disposal 0.50 29.24 19.90 – nr 49.14 concrete base 0.47 7.52 2.37 26.04 nr 35.93 main chamber rings 2.85 49.17 36.08 64.83 nr 150.08 cover slab 3.80 65.56 48.11 86.44 nr 200.11 concrete surround 0.74 11.80 4.18 29.57 nr 45.55 concrete benching, main and branch channels 3.38 54.61 12.50 75.99 nr 143.10 step irons 0.22 3.60 0.40 28.68 nr 32.68 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 13.40 245.02 126.01 442.38 nr 813.41
hours £ £ £ rate £
MANHOLES – cont
Precast concrete construction – cont 900 diameter × 1000 depth to invert
excavation, support, backfilling and disposal 0.67 38.94 26.50 – nr 65.44 concrete base 0.47 7.52 2.37 26.04 nr 35.93 main chamber rings 3.80 65.56 48.11 86.44 nr 200.11 cover slab 3.80 65.56 48.11 86.44 nr 200.11 concrete surround 0.97 15.49 5.49 38.81 nr 59.79 concrete benching, main and branch channels 3.38 54.61 12.50 75.99 nr 143.10 step irons 0.33 5.40 0.60 43.02 nr 49.02 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 14.86 276.60 146.15 487.57 nr 910.32 900 diameter × 1500 depth to invert
excavation, support, backfilling and disposal 0.99 58.93 39.96 – nr 98.89 concrete base 0.47 7.52 2.37 26.04 nr 35.93 main chamber rings 5.70 98.34 72.16 129.66 nr 300.16 cover slab 2.16 37.27 27.37 95.40 nr 160.04 concrete surround 1.47 23.60 8.36 59.14 nr 91.10 concrete benching, main and branch channels 3.38 54.61 12.50 75.99 nr 143.10 step irons 0.44 7.20 0.80 57.36 nr 65.36 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 16.05 310.99 165.99 574.42 nr 1051.40 1200 diameter × 1500 depth to invert
excavation, support, backfilling and disposal 1.72 101.14 62.32 – nr 163.46 concrete base 0.83 13.43 4.23 46.49 nr 64.15 main chamber rings 7.02 121.13 88.91 173.16 nr 383.20 cover slab 2.80 48.31 35.47 126.74 nr 210.52 concrete surround 1.95 31.35 11.10 78.55 nr 121.00 concrete benching, main and branch channels 6.13 98.70 25.28 87.41 nr 211.39 step irons 0.44 7.20 0.80 57.36 nr 65.36 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 22.33 444.78 230.58 700.54 nr 1375.90 1200 diameter × 2000 depth to invert
excavation, support, backfilling and disposal 2.34 140.78 99.79 – nr 240.57 concrete base 0.83 13.43 4.23 46.49 nr 64.15 main chamber rings 9.36 161.50 118.54 230.88 nr 510.92 cover slab 2.80 48.31 35.47 126.74 nr 210.52 concrete surround 2.60 41.67 14.76 104.42 nr 160.85 concrete benching, main and branch channels 6.13 98.70 25.28 87.41 nr 211.39 step irons 0.66 10.80 1.20 86.04 nr 98.04 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 26.16 538.71 301.74 812.81 nr 1653.26
hours £ £ £ rate £
1200 diameter × 2500 depth to invert excavation, support, backfilling and disposal 2.92 176.06 124.80 – nr 300.86 concrete base 0.83 13.43 4.23 46.49 nr 64.15 main chamber rings 11.70 201.88 148.18 288.60 nr 638.66 cover slab 2.80 48.31 35.47 126.74 nr 210.52 concrete surround 3.24 52.00 18.41 130.30 nr 200.71 concrete benching, main and branch channels 6.13 98.70 25.28 87.41 nr 211.39 step irons 0.88 14.40 1.60 114.72 nr 130.72 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 29.94 628.30 360.44 925.09 nr 1913.83 1200 diameter × 3000 depth to invert
excavation, support, backfilling and disposal 3.52 211.44 149.81 – nr 361.25 concrete base 0.83 13.43 4.23 46.49 nr 64.15 main chamber rings 14.04 242.25 177.81 346.32 nr 766.38 cover slab 2.80 48.31 35.47 126.74 nr 210.52 concrete surround 3.91 62.70 22.20 157.10 nr 242.00 concrete benching, main and branch channels 6.13 98.70 25.28 87.41 nr 211.39 step irons 0.99 16.20 1.80 129.06 nr 147.06 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 33.66 716.55 419.07 1023.95 nr 2159.57 1800 diameter × 2000 depth to invert
excavation, support, backfilling and disposal 5.00 292.72 160.71 – nr 453.43 concrete base 1.91 30.62 9.65 105.99 nr 146.26 main chamber rings 12.00 207.04 152.00 580.74 nr 939.78 cover slab 3.60 62.11 45.60 342.15 nr 449.86 concrete surround 3.91 62.70 22.20 157.10 nr 242.00 concrete benching, main and branch channels 7.38 118.85 30.04 102.13 nr 251.02 step irons 0.66 10.80 1.20 86.04 nr 98.04 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 35.90 808.36 423.87 1504.98 nr 2737.21 1800 diameter × 2500 depth to invert
excavation, support, backfilling and disposal 6.40 381.43 234.92 – nr 616.35 concrete base 1.91 30.62 9.65 105.99 nr 146.26 main chamber rings 15.00 258.80 190.00 725.92 nr 1174.72 cover slab 3.60 62.11 45.60 342.15 nr 449.86 concrete surround 4.88 78.19 27.69 195.91 nr 301.79 concrete benching, main and branch channels 7.38 118.85 30.04 102.13 nr 251.02 step irons 0.88 14.40 1.60 114.72 nr 130.72 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 41.49 967.92 541.97 1717.65 nr 3227.54 1800 diameter × 3000 depth to invert
excavation, support, backfilling and disposal 7.69 457.88 281.91 – nr 739.79 concrete base 1.91 30.62 9.65 105.99 nr 146.26 main chamber rings 18.00 310.56 228.00 871.11 nr 1409.67 cover slab 3.60 62.11 45.60 342.15 nr 449.86 concrete surround 5.84 93.68 33.17 234.72 nr 361.57
hours £ £ £ rate £
MANHOLES – cont
Precast concrete construction – cont 1800 diameter × 3000 depth to invert – cont
concrete benching, main and branch channels 7.38 118.85 30.04 102.13 nr 251.02 step irons 0.99 16.20 1.80 129.06 nr 147.06 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 46.85 1113.42 632.64 1915.99 nr 3662.05 1800 diameter × 3500 depth to invert
excavation, support, backfilling and disposal 9.19 555.41 428.34 – nr 983.75 concrete base 1.91 30.62 9.65 105.99 nr 146.26 main chamber rings 21.00 362.32 266.00 1016.30 nr 1644.62 cover slab 3.60 62.11 45.60 342.15 nr 449.86 concrete surround 6.83 109.53 38.79 274.46 nr 422.78 concrete benching, main and branch channels 7.38 118.85 30.04 102.13 nr 251.02 step irons 1.21 19.80 2.20 157.74 nr 179.74 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 52.56 1282.16 823.09 2129.60 nr 4234.85 1800 diameter × 4000 depth to invert
excavation, support, backfilling and disposal 10.49 634.37 489.40 – nr 1123.77 concrete base 1.91 30.62 9.65 105.99 nr 146.26 main chamber rings 24.00 414.08 304.00 1161.48 nr 1879.56 cover slab 3.60 62.11 45.60 342.15 nr 449.86 concrete surround 7.80 125.02 44.27 313.27 nr 482.56 concrete benching, main and branch channels 7.38 118.85 30.04 102.13 nr 251.02 step irons 1.43 23.40 2.60 186.42 nr 212.42 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 58.05 1431.97 928.03 2342.27 nr 4702.27 2400 diameter × 3000 depth to invert
excavation, support, backfilling and disposal 4.74 359.88 421.69 – nr 781.57 concrete base 3.42 54.80 17.27 189.68 nr 261.75 main chamber rings 21.60 471.15 855.27 2204.49 nr 3530.91 cover slab 4.40 95.98 174.24 970.91 nr 1241.13 concrete surround 7.80 125.02 44.27 313.27 nr 482.56 concrete benching, main and branch channels 7.88 127.20 30.04 102.13 nr 259.37 step irons 0.99 16.20 1.80 129.06 nr 147.06 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 52.27 1273.75 1547.05 4040.37 nr 6861.17 2400 diameter × 4500 depth to invert
excavation, support, backfilling and disposal 20.69 1242.87 854.79 – nr 2097.66 concrete base 3.42 54.80 17.27 189.68 nr 261.75 main chamber rings 32.40 706.73 1282.90 3306.74 nr 5296.37 cover slab 4.40 95.98 174.24 970.91 nr 1241.13 concrete surround 11.71 187.72 66.48 470.37 nr 724.57 concrete benching, main and branch channels 7.88 127.20 30.04 102.13 nr 259.37 step irons 1.54 25.20 2.80 200.76 nr 228.76 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 83.48 2464.02 2430.99 5371.42 nr 10266.43
hours £ £ £ rate £
2700 diameter × 3000 depth to invert excavation, support, backfilling and disposal 16.96 1003.54 551.78 – nr 1555.32 concrete base 4.32 69.30 21.84 239.89 nr 331.03 main chamber rings 24.00 523.50 950.28 2559.21 nr 4032.99 cover slab 4.80 104.70 190.06 1953.88 nr 2248.64 concrete surround 8.79 140.88 49.89 353.01 nr 543.78 concrete benching, main and branch channels 8.08 130.54 30.04 102.13 nr 262.71 step irons 0.99 16.20 1.80 129.06 nr 147.06 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 69.38 2012.18 1798.16 5468.01 nr 9278.35 2700 diameter × 4500 depth to invert
excavation, support, backfilling and disposal 26.06 1561.92 1029.43 – nr 2591.35 concrete base 4.29 68.93 21.73 238.95 nr 329.61 main chamber rings 36.00 785.25 1425.42 3838.82 nr 6049.49 cover slab 4.80 104.70 190.06 1953.88 nr 2248.64 concrete surround 13.18 211.32 74.83 529.51 nr 815.66 concrete benching, main and branch channels 8.08 130.54 30.04 102.13 nr 262.71 step irons 1.54 25.20 2.80 200.76 nr 228.76 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 95.39 2911.38 2776.78 6994.88 nr 12683.04 3000 diameter × 3000 depth to invert
excavation, support, backfilling and disposal 20.86 1232.53 660.84 – nr 1893.37 concrete base 5.33 85.42 26.91 295.67 nr 408.00 main chamber rings 25.80 562.77 1021.53 3522.51 nr 5106.81 cover slab 5.20 113.43 205.91 1411.02 nr 1730.36 concrete surround 9.75 156.37 55.37 391.82 nr 603.56 concrete benching, main and branch channels 8.88 143.35 30.04 102.13 nr 275.52 step irons 0.99 16.20 1.80 129.06 nr 147.06 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 78.25 2333.59 2004.87 5983.04 nr 10321.50 3000 diameter × 4500 depth to invert
excavation, support, backfilling and disposal 32.03 1917.09 1219.03 – nr 3136.12 concrete base 5.33 85.42 26.91 295.67 nr 408.00 main chamber rings 38.70 844.15 1532.30 5283.77 nr 7660.22 cover slab 5.20 113.43 205.91 1411.02 nr 1730.36 concrete surround 14.63 234.56 83.06 587.73 nr 905.35 concrete benching, main and branch channels 8.88 143.35 30.04 102.13 nr 275.52 step irons 1.54 25.20 2.80 200.76 nr 228.76 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 107.75 3386.72 3102.52 8011.91 nr 14501.15 3000 diameter × 6000 depth to invert
excavation, support, backfilling and disposal 42.72 2555.97 1625.33 – nr 4181.30 concrete base 5.33 85.42 26.91 295.67 nr 408.00 main chamber rings 51.60 1125.54 2043.06 7045.02 nr 10213.62 cover slab 5.20 113.43 205.91 1411.02 nr 1730.36 concrete surround 19.50 312.74 110.75 783.64 nr 1207.13 concrete benching, main and branch channels 8.88 143.35 30.04 102.13 nr 275.52 step irons 2.09 34.20 3.80 272.46 nr 310.46 access cover and frame 1.44 23.52 2.47 130.83 nr 156.82
TOTAL 136.76 4394.17 4048.27 10040.77 nr 18483.21
hours £ £ £ rate £
MANHOLES – cont
Precast concrete circular manhole; CPM Perfect Manhole; complete with preformed benching and outlets to base; elastomeric seal to joints to rings; single steps as required. Excavations and backfilling not included 1200mm diameter with up to four outlets 100mm or 150mm diameter; effective internal depth:
1250mm deep 2.45 108.81 35.69 904.35 nr 1048.85 1500mm deep 2.25 101.15 35.69 1006.20 nr 1143.04 1800mm deep 2.50 113.73 35.69 1048.99 nr 1198.41 2000mm deep 2.50 113.73 35.69 1178.93 nr 1328.35 2500mm deep 2.75 123.30 44.61 1323.57 nr 1491.48
1500mm diameter with up to four outlets up to 450mm diameter; effective internal depth:
2000mm deep 2.75 123.30 44.61 1950.78 nr 2118.69 2500mm deep 3.05 136.58 49.96 2191.89 nr 2378.43 3000mm deep 3.10 139.10 49.96 2234.68 nr 2423.74 3500mm deep 3.40 151.78 57.10 2348.24 nr 2557.12 4000mm deep 3.55 158.73 58.89 2679.52 nr 2897.14 4500mm deep 3.55 158.73 58.89 2920.63 nr 3138.25
1500mm diameter with up to four outlets up to 600mm diameter; effective internal depth:
4000mm deep 3.95 178.25 62.45 2599.32 nr 2840.02 4500mm deep 4.50 202.31 71.38 2764.96 nr 3038.65
hours £ £ £ rate £
GULLIES
Vitrified clay; set in concrete grade C20, 150mm thick; additional excavation and disposal Road gully
450mm diameter × 900mm deep, 100mm or 150mm outlet; cast iron road gully grating and frame group 4 434×434mm, on Class B engineering brick seating 0.50 34.21 1.33 614.72 nr 650.26
Yard gully (mud); trapped with rodding eye; galvanized bucket; stopper
225mm diameter, 100mm diameter outlet, cast iron hinged grate and frame 0.30 20.52 0.80 325.80 nr 347.12
Grease interceptors; internal access and bucket 600× 450mm, metal tray and lid, square hopper with horizontal inlet 0.35 23.94 0.93 1729.03 nr 1753.90
Precast concrete; set in concrete grade C20, 150mm thick; additional excavation and disposal Road gully; trapped with rodding eye; galvanized bucket; stopper
450mm diameter × 750mm deep; cast iron road gully grating and frame group 4, 434×434mm, on Class B engineering brick seating 0.50 34.21 1.33 505.20 nr 540.74 450mm diameter × 900mm deep; cast iron road gully grating and frame group 4, 434×434mm, on Class B engineering brick seating 0.54 36.94 1.44 522.63 nr 561.01 450mm diameter × 1050mm deep, cast iron road gully grating and frame group 4, 434×434mm, on Class B engineering brick seating 0.58 39.68 1.55 534.14 nr 575.37
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 × 2.75 (minimum) in hard clay × 1.75 to 2.00 in running sand × 2.75 (minimum) in broken rock × 2.75 to 3.50 below water table × 2.00 (minimum)
hours £ £ £ rate £
FRENCH DRAINS, RUBBLE DRAINS, DITCHES – cont Excavation of trenches for unpiped rubble drains (excluding trench support); cross-sectional area
0.25-0.50m2 0.10 7.68 4.66 – m 12.34 0.50-0.75m2 0.12 9.21 5.58 – m 14.79 0.75-1.00m2 0.14 10.75 6.52 – m 17.27 1.00-1.50m2 0.17 13.05 7.91 – m 20.96 1.50-2.00m2 0.20 15.35 9.31 – m 24.66
Filling French and rubble drains with graded material graded material; 20mm stone aggregate; PC £4.45/t 0.30 23.03 13.96 30.06 m3 67.05 broken brick/concrete rubble; PC £3.42/t 0.29 22.26 13.49 32.27 m3 68.02
Excavation of rectangular section ditches; unlined; cross-sectional area
0.25-0.50m² 0.11 8.44 5.02 – m 13.46 0.50-0.75m² 0.13 9.98 5.93 – m 15.91 0.75-1.00m² 0.16 12.28 7.30 – m 19.58 1.00-1.50m² 0.20 15.35 9.13 – m 24.48 1.50-2.00m² 0.25 19.19 11.41 – m 30.60
Excavation of rectangular ditches; lined with precast concrete slabs; cross-sectional area
0.25-0.50m² 0.15 11.51 7.34 14.85 m 33.70 0.50-0.75m² 0.25 19.19 12.25 21.81 m 53.25 0.75-1.00m² 0.36 27.63 17.63 30.99 m 76.25 1.00-1.50m² 0.40 30.71 19.59 43.75 m 94.05 1.50-2.00m² 0.45 34.54 22.05 61.76 m 118.35
Excavation of vee section ditches; unlined; cross-sectional area
0.25-0.50m² 0.10 7.68 5.24 – m 12.92 0.50-0.75m² 0.12 9.21 6.27 – m 15.48 0.75-1.00m² 0.14 10.75 7.34 – m 18.09 1.00-1.50m² 0.18 13.82 9.43 – m 23.25 1.50-2.00m² 0.22 16.89 11.52 – m 28.41
DUCTS AND METAL CULVERTS
Galvanized steel culverts; bitumen coated Sectional corrugated metal culverts, nominal internal diameter 0.5-1m; 1000mm nominal internal diameter, 1.6mm thick
not in trenches 0.15 11.51 0.85 126.07 m 138.43 in trenches, depth not exceeding 1.5m 0.31 23.80 16.19 126.07 m 166.06 in trenches, depth 1.5-2m 0.43 33.01 22.45 126.07 m 181.53 in trenches, depth 2 – 2.5m 0.51 39.15 26.63 126.07 m 191.85 in trenches, depth 2.5-3m 0.60 46.06 31.34 126.07 m 203.47
hours £ £ £ rate £
Sectional corrugated metal culverts, nominal internal diameter exceeding 1.5m; 1600mm nominal internal diameter, 1.6mm thick
not in trenches 0.21 16.12 1.20 202.25 m 219.57 in trenches, depth 1.5-2m 0.44 33.78 22.98 202.25 m 259.01 in trenches, depth 2 – 2.5m 0.56 42.99 29.25 202.25 m 274.49 in trenches, depth 2.5-3m 0.68 52.20 35.52 202.25 m 289.97 in trenches, depth 3 -3.5m 0.82 62.95 42.85 202.25 m 308.05
Sectional corrugated metal culverts, nominal internal diameter exceeding 1.5m; 2000mm nominal internal diameter, 1.6mm thick
not in trenches 0.26 19.96 1.49 428.13 m 449.58 in trenches, depth 2 – 2.5m 0.46 35.31 24.04 428.13 m 487.48 in trenches, depth 2.5-3m 0.60 46.06 31.34 428.13 m 505.53 in trenches, depth 3 – 3.5m 0.75 57.57 39.17 428.13 m 524.87 in trenches, depth 3.5-4m 0.93 71.39 48.59 428.13 m 548.11
Sectional corrugated metal culverts, nominal internal diameter exceeding 1.5m; 2200mm nominal internal diameter, 1.6mm thick
not in trenches 0.33 25.33 1.88 482.39 m 509.60 in trenches, depth 2.5-3m 0.64 49.13 33.43 482.39 m 564.95 in trenches, depth 3 – 3.5m 0.77 59.11 40.23 482.39 m 581.73 in trenches, depth 3.5-4m 1.02 78.30 53.30 482.39 m 613.99 in trenches, depth exceeding 4m 1.32 101.33 68.95 482.39 m 652.67
OTHER PIPEWORK ANCILLARIES
Notes Refer to Section G (Concrete and concrete ancillaries) for costs relevant to the construction of Headwall Structure.
