ABSTRACT
TOTAL – – – – £ 633.00 750×700 chamber 1000 depth to invert
excavation, support, backfilling and disposal
– – – – – 52.00
concrete base – – – – – 86.00 brickwork chamber
– – – – – 174.00
concrete cover slab
– – – – – 105.00
concrete benching and channels
– – – – – 84.00
step irons – – – – – 15.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 786.00 750×700 chamber 1500 depth to invert
excavation, support, backfilling and disposal
– – – – – 74.00
concrete base – – – – – 86.00 brickwork chamber
– – – – – 300.00
concrete cover slab
– – – – – 105.00
concrete benching and channels
– – – – – 84.00
step irons – – – – – 25.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 944.00 900×700 chamber 500 depth to invert
excavation, – – – – – 36.00
disposal concrete base – – – – – 89.00 brickwork chamber
– – – – – 51.00
concrete cover slab
– – – – – 116.00
concrete benching and channels
– – – – – 95.00
step irons – – – – – 10.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 667.00
rate £ 900×700 chamber 1000 depth to invert
excavation, support, backfilling and disposal
– – – – – 60.00
concrete base – – – – – 89.00 brickwork chamber
– – – – – 188.00
concrete cover slab
– – – – – 116.00
concrete benching and channels
– – – – – 95.00
step irons – – – – – 15.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 833.00 900×700 chamber 1500 depth to invert
excavation, support, backfilling and disposal
– – – – – 84.00
concrete base – – – – – 89.00
concrete cover slab
– – – – – 116.00
concrete benching and channels
– – – – – 95.00
step irons – – – – – 25.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 1004.00 1050×700 chamber 1500 depth to invert
excavation, support, backfilling and disposal
– – – – – 91.00
concrete base – – – – – 92.00 brickwork chamber
– – – – – 349.00
concrete cover slab
– – – – – 126.00
concrete benching and channels
– – – – – 107.00
step irons – – – – – 25.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 1060.00 1050×700 chamber 2500 depth to invert
excavation, support, backfilling and disposal
– – – – – 154.00
concrete base – – – – – 92.00 brickwork chamber
– – – – – 643.00
concrete cover slab
– – – – – 126.00
concrete benching and channels
– – – – – 107.00
step irons – – – – – 40.00
TOTAL – – – – £ 1432.00 1050×700 chamber 3500 depth to invert
excavation, support, backfilling and disposal
– – – – – 225.00
concrete base – – – – – 92.00 brickwork chamber
– – – – – 640.00
access shaft – – – – – 185.00 reducing slab – – – – – 141.00 concrete cover slab
– – – – – 85.00
concrete benching and channels
– – – – – 107.00
step irons – – – – – 80.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 1825.00 1350×700 chamber 2500 depth to invert
excavation, support, backfilling and disposal
– – – – – 188.00
concrete base – – – – – 102.00 brickwork chamber
– – – – – 748.00
concrete cover slab
– – – – – 152.00
concrete benching and channels
– – – – – 135.00
step irons – – – – – 40.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 1635.00
rate £ 1350×700 chamber 3500 depth to invert
excavation, support, backfilling and disposal
– – – – – 275.00
concrete base – – – – – 102.00 brickwork chamber
– – – – – 745.00
access shaft – – – – – 185.00 reducing slab – – – – – 163.00 concrete cover slab
– – – – – 85.00
concrete benching and channels
– – – – – 135.00
step irons – – – – – 80.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 2040.00 1350×700 chamber 4500 depth to invert
excavation, support, backfilling and disposal
– – – – – 369.00
concrete base – – – – – 102.00 brickwork chamber
– – – – – 745.00
access shaft – – – – – 445.00 reducing slab – – – – – 163.00 concrete cover slab
– – – – – 85.00
concrete benching and channels
– – – – – 135.00
step irons – – – – – 150.00 access cover – – – – – 270.00
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
□ in manholes over 6 m deep, landings at maximum intervals
675 diameter×500 depth to invert
excavation, support, backfilling and disposal
– – – – – 24.00
concrete base – – – – – 36.00 main chamber rings
– – – – – 18.00
cover slab – – – – – 71.00 concrete benching and channels
– – – – – 47.00
concrete surround
– – – – – 37.00
step irons – – – – – – access cover and frame
– – – – – 270.00
TOTAL – – – – £ 503.00
rate £ 675 diameter×750 depth to invert
excavation, support, backfilling and disposal
– – – – – 32.00
concrete base – – – – – 36.00 main chamber rings
– – – – – 41.00
cover slab – – – – – 71.00 concrete benching and channels
– – – – – 47.00
concrete surround
– – – – – 54.00
step irons – – – – – –
TOTAL – – – – £ 551.00 675 diameter×1000 depth to invert
excavation, support, backfilling and disposal
– – – – – 39.00
concrete base – – – – – 36.00 main chamber rings
– – – – – 65.00
cover slab – – – – – 71.00 concrete benching and channels
– – – – – 47.00
step irons – – – – – – concrete surround
– – – – – 72.00
access cover and frame
– – – – – 270.00
TOTAL – – – – £ 600.00 675 diameter×1250 depth to invert
excavation, support, backfilling and disposal
– – – – – 46.00
concrete base – – – – – 36.00 main chamber rings
– – – – – 89.00
cover slab – – – – – 71.00 concrete benching and channels
– – – – – 47.00
concrete surround
– – – – – 89.00
step irons – – – – – 6.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 654.00 900 diameter×750 depth to invert
excavation, support,
– – – – – 46.00
concrete base – – – – – 50.00 main chamber rings
– – – – – 51.00
cover slab – – – – – 86.00 concrete benching and channels
– – – – – 95.00
concrete surround
– – – – – 68.00
step irons – – – – – – access cover and frame
– – – – – 270.00
TOTAL – – – – £ 617.00 900 diameter×1000 depth to invert
excavation, support, backfilling and disposal
– – – – – 56.00
concrete base – – – – – 50.00 main chamber rings
– – – – – 81.00
cover slab – – – – – 86.00 concrete benching and channels
– – – – – 95.00
concrete surround
– – – – – 89.00
step irons – – – – – – access cover and frame
– – – – – 270.00
TOTAL – – – – £ 692.00
rate £ 900 diameter×1500 depth to invert
excavation, support, backfilling and disposal
– – – – – 80.00
concrete base – – – – – 50.00
cover slab – – – – – 86.00 concrete benching and channels
– – – – – 95.00
concrete surround
– – – – – 132.00
step irons – – – – – 12.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 830.00 1200 diameter×1500 depth to invert
excavation, support, backfilling and disposal
– – – – – 125.00
concrete base – – – – – 73.00 main chamber rings
– – – – – 190.00
concrete benching and channels
– – – – – 72.00
cover slab – – – – – 122.00 concrete surround
– – – – – 173.00
step irons – – – – – 12.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 1037.00 1200 diameter×2000 depth to invert
excavation, support, backfilling and disposal
– – – – – 176.00
concrete base – – – – – 73.00 main chamber rings
– – – – – 267.00
cover slab – – – – – 122.00 concrete benching and channels
– – – – – 72.00
concrete surround
– – – – – 229.00
and frame
TOTAL – – – – £ 1232.00 1200 diameter×2500 depth to invert
excavation, support, backfilling and disposal
– – – – – 216.00
concrete base – – – – – 73.00 main chamber rings
– – – – – 347.00
cover slab – – – – – 122.00 concrete benching and channels
– – – – – 72.00
concrete surround
– – – – – 285.00
step irons – – – – – 29.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 1414.00 1200 diameter×3000 depth to invert
excavation, support, backfilling and disposal
– – – – – 278.00
concrete base – – – – – 73.00 main chamber rings
– – – – – 428.00
cover slab – – – – – 122.00 concrete benching and channels
– – – – – 72.00
concrete surround
– – – – – 342.00
step irons – – – – – 82.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 1667.00
1800 diameter×1500 depth to invert
excavation, support, backfilling and disposal
– – – – – 228.00
concrete base – – – – – 128.00 main chamber rings
– – – – – 298.00
cover slab – – – – – 211.00 concrete benching and channels
– – – – – 111.00
concrete surround
– – – – – 242.00
step irons – – – – – 12.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 1500.00 1800 diameter×2000 depth to invert
excavation, support, backfilling and disposal
– – – – – 320.00
concrete base – – – – – 128.00 main chamber rings
– – – – – 427.00
cover slab – – – – – 211.00 concrete benching and channels
– – – – – 111.00
concrete surround
– – – – – 322.00
step irons – – – – – 23.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 1812.00 1800 diameter×2500 depth to invert
excavation, support, backfilling and disposal
– – – – – 390.00
rings
cover slab – – – – – 211.00 concrete benching and channels
– – – – – 111.00
concrete surround
– – – – – 402.00
step irons – – – – – 29.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 2096.00 1800 diameter×3000 depth to invert
excavation, suport, backfilling and disposal
– – – – – 502.00
concrete base – – – – – 128.00 main chamber rings
– – – – – 684.00
cover slab – – – – – 211.00 concrete surround
– – – – – 481.00
concrete benching and channels
– – – – – 111.00
step irons – – – – – 82.00 access cover and frame
– – – – – 270.00
TOTAL – – – – – 2469.00 1800 diameter×3500 depth to invert
excavation, support, backfilling and disposal
– – – – – 575.00
concrete base – – – – – 128.00 access shaft – – – – – 81.00 main chamber rings
– – – – – 566.00
reducing slab – – – – – 226.00 cover slab – – – – – 86.00 concrete benching and
– – – – – 111.00
surround
step irons – – – – – 105.00 access cover and frame
– − – – – 270.00
TOTAL – – – – £ 2647.00
rate £ 1800 diameter×4000 depth to invert
excavation, support, backfilling and disposal
– – – – – 698.00
concrete base – – – – – 128.00 access shaft – – – – – 140.00 main chamber rings
– – – – – 566.00
reducing slab – – – – – 226.00 cover slab – – – – – 86.00 concrete benching and channels
– – – – – 111.00
concrete surround
– – – – – 544.00
step irons – – – – – 117.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 2886.00 2400 diameter×1500 depth to invert
excavation, support, backfilling and disposal
– – – – – 363.00
concrete base – – – – – 198.00 main chamber rings
– – – – – 572.00
cover slab – – – – – 617.00 concrete benching and channels
– – – – – 161.00
step irons – – – – – 12.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 2506.00 2400 diameter×3000 depth to invert
excavation, support, backfilling and disposal
– – – – – 788.00
concrete base – – – – – 198.00 main chamber rings
– – – – – 1329.00
cover slab – – – – – 617.00 concrete benching and channels
– – – – – 161.00
concrete surround
– – – – – 620.00
step irons – – – – – 82.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 4065.00 2400 diameter×4500 depth to invert
excavation, support, backfilling and disposal
– – – – – 1214.00
concrete base – – – – – 198.00 access shaft – – – – – 199.00 main chamber rings
– – – – – 1099.00
reducing slab – – – – – 619.00 cover slab – – – – – 86.00 concrete benching and channels
– – – – – 161.00
concrete surround
– – – – – 710.00
step irons – – – – – 140.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 4696.00
depth to invert
excavation, support, backfilling and disposal
– – – – – 443.00
concrete base – – – – – 240.00 main chamber rings
– – – – – 656.00
cover slab – – – – – 772.00 concrete benching and channels
– – – – – 190.00
concrete surround
– – – – – 349.00
step irons – – – – – 12.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 2932.00
rate £ 2700 diameter×3000 depth to invert
excavation, support, backfilling and disposal
– – – – – 958.00
concrete base – – – – – 240.00 main chamber rings
– – – – – 1543.00
cover slab – – – – – 772.00 concrete benching and channels
– – – – – 190.00
concrete surround
– – – – – 691.00
step irons – – – – – 82.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 4746.00 2700 diameter×4500 depth to invert
excavation, – – – – – 1472.00
disposal concrete base – – – – – 240.00 access shaft – – – – – 199.00 main chamber rings
– – – – – 1276.00
reducing slab – – – – – 767.00 cover slab – – – – – 86.00 concrete benching and channels
– – – – – 190.00
concrete surround
– – – – – 772.00
step irons – – – – – 140.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 5412.00 3000 diameter×3000 depth to invert
excavation, support, backfilling and disposal
– – – – – 1155.00
concrete base – – – – – 287.00 main chamber rings
– – – – – 2065.00
cover slab – – – – – 973.00 concrete benching and channels
– – – – – 205.00
concrete surround
– – – – – 767.00
step irons – – – – – 82.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 5804.00 3000 diameter×4500 depth to invert
excavation, support, backfilling and disposal
– – – – – 1774.00
concrete base – – – – – 287.00 access shaft – – – – – 199.00 main chamber – – – – – 1708.00
cover slab – – – – – 86.00 concrete benching and channels
– – – – – 205.00
concrete surround
– – – – – 836.00
step irons – – – – – 140.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 6383.00 3000 diameter×6000 depth to invert
excavation, support, backfilling and disposal
– – – – – 2627.00
concrete base – – – – – 287.00 access shaft – – – – – 377.00 main chamber rings
– – – – – 1708.00
reducing slab – – – – – 878.00 cover slab – – – – – 86.00 concrete benching and channels
– – – – – 205.00
concrete surround
– – – – – 975.00
step irons – – – – – 199.00 access cover and frame
– – – – – 270.00
TOTAL – – – – £ 7612.00
rate £ BACKDROPS TO MANHOLES
Clayware vertical pipe complete with rest bend at base and tumbling bay junction to
stopper; concrete grade C20 surround, 150 mm thick; additional excavation and disposal 100 pipe 1.15 m to invert – – – – nr 83.00 2.15 m to invert – – – – nr 106.00 3.15 m to invert – – – – nr 128.00 4.15 m to invert – – – – nr 152.00 150 pipe 1.15 m to invert – – – – nr 128.00 2.15 m to invert – – – – nr 154.00 3.15 m to invert – – – – nr 184.00 4.15 m to invert – – – – nr 214.00 225 pipe 1.15 m to invert – – – – nr 255.00 2.15 m to invert – – – – nr 299.00 3.15 m to invert – – – – nr 345.00 4.15 m to invert – – – – nr 393.00 GULLIES Vitrified clay; set in concrete grade C20, 150 mm thick; additional excavation and disposal
Road gulley 450 mm diameter×900 mm deep, 100 mm or 150 mm outlet; PC £126.00.00*; cast iron road gulley grating and frame group 4 434×434 mm, PC £49.00*, on Class B engineering brick seating
0.50 17.27 0.61 207.74 nr 225.62
with redding eye; galvanised bucket; stopper
225 mm diameter, 100 mm diameter outlet, PC £89.00*; cast iron hinged grate and frame
0.30 10.36 0.37 98.56 nr 109.28
Grease interceptors; internal access and bucket 600×450 mm, PC £704.00*; metal tray and lid, square hopper with horizontal inlet
0.35 12.09 0.43 716.93 nr 729.44
Precast concrete; set in concrete grade C20, 150 mm thick; additional excavation and disposal
Road gulley; trapped with redding eye; galvanised bucket; stopper
450 mm diameter×750 mm deep, PC £45.00*; cast iron road gulley grating and frame group 4, 434×434 mm, PC £55.00*, on Class B engineering brick seating
0.50 17.27 0.61 131.95 nr 149.82
450 mm diameter×900 mm deep, PC £46.00*; cast
0.54 18.65 0.66 132.86 nr 152.17
frame group 4, 434×434 mm, PC £55.00*, on Class B engineering brick seating
rate £ 450 mm diameter×1050 mm deep, PC £50.00*; cast iron road gulley grating and frame group 4, 434×434 mm, PC £55.00*, on Class B engineering brick seating
0.58 20.03 0.71 136.82 nr 157.56
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.
