Substructure

Raft foundations simple reinforced concrete raft on poorer ground for development up to two storey high m2 130.00 to 165.00

Basements Reinforced concrete basement floors; Note: excluding bulk excavation costs and hardcore fill

200mm thick waterproof concrete with 2 × layers of A252mesh reinforcement m2 52.00 to 67.00

Reinforced concrete basement walls; Note: excluding bulk excavation costs and hardcore fill

200mm thick waterproof reinforced concrete m2 290.00 to 370.00

Trench fill foundations Machine excavation, disposal, plain in situ concrete 20.00N/mm² – 20mm aggregate (1:2:4) trench fill, 300mm high cavity masonry in cement mortar (1:3), pitch polymer damp roof course With 3 courses of common brick outer skin up to dpc level (PC bricks @ £240/1000)

600mm×1000mm deep m 85.00 to 100.00 600mm×1500mm deep m 115.00 to 140.00

With 3 courses of facing bricks brick outer skin up to dpc level (PC bricks @ £350/1000)

600mm×1000mm deep m 87.00 to 105.00 600mm×1500mm deep m 120.00 to 145.00

With 3 courses of facing bricks brick outer skin up to dpc level (PC bricks @ £500/1000)

600mm×1000mm deep m 89.00 to 110.00 600mm×1500mm deep m 120.00 to 150.00

Strip foundations Excavate trench 600mm wide, partial backfill, partial disposal, earthwork support (risk item), compact base of trench, plain in situ concrete 20.00N/ mm² – 20mm aggregate (1:2:4), 250mm thick, 3 courses of common brick up to dpc level, cavity brickwork/blockwork in cement mortar (1:3), pitch polymer damp-proof course machine excavation With 3 courses of common brick outer skin up to dpc level (PC bricks @ £240/1000)

600mm×1000mm deep m 89.00 to 110.00 600mm×1500mm deep m 115.00 to 140.00

With 3 courses of common brick outer skin up to dpc level (PC bricks @ £350/1000)

600mm×1000mm deep m 93.00 to 115.00 600mm×1500mm deep m 120.00 to 150.00

With 3 courses of common brick outer skin up to dpc level (PC bricks @ £500/1000)

600mm×1000mm deep m 97.00 to 120.00 600mm×1500mm deep m 125.00 to 150.00

Column bases Excavate pit in firm ground by machine, partial backfill, partial disposal, support, compact base of pit; in situ concrete 25.00N/mm²; reinforced at 50 kg/m³ rates per base for base size

600mm×600mm×300mm; 1000mm deep pit nr 97.00 to 120.00 900mm×900mm×450mm; 1250mm deep pit nr 150.00 to 180.00 1500mm×1500mm×600mm; 1500mm deep pit nr 360.00 to 440.00 2700mm×2700mm×1000mm; 1500mm deep pit nr 1450.00 to 1775.00

rates per m³ for base size 600mm×600mm×300mm; 1000mm deep pit m3 780.00 to 950.00 900mm×900mm×450mm; 1250mm deep pit m3 420.00 to 510.00 1500mm×1500mm×600mm; 1500mm deep pit m3 280.00 to 345.00 2700mm×2700mm×1000mm; 1500mm deep pit m3 210.00 to 250.00

extra for reinforcement at 75 kg/m³ concrete, base size m3 70.00 to 86.00 reinforcement at 100 kg/m³ concrete, base size m3 87.00 to 105.00

Piling Enabling Works

excavate to form piling mat; supply and lay imported hardcore – recycled brick and similar to form piling mat m3 6.80 to 8.30 provision of plant (1nr rig); including bringing to and removing from site; maintenance, erection and dismantling at each pile position item 14500.00 to 18000.00

Supply and install concrete Continuous Flight Auger (CFA) piles; cart away inactive spoil; measure total length of pile

450mm diameter reinforced concrete CFA piles m 41.50 to 51.00 600mm diameter reinforced concrete CFA piles m 66.00 to 81.00 750mm diameter reinforced concrete CFA piles m 100.00 to 125.00 900mm diameter reinforced concrete CFA piles m 145.00 to 180.00

1.1 SUBSTRUCTURE – cont

Piling – cont Pile testing

using tension piles as reaction; typicla loading test 1000 kN to 2000 kN item 6700.00 to 9700.00 integrity testing; minimum 20 per visit nr 13.10 to 14.40

Secant wall piling, 750mm diameter piles’ including site mobilization and demobilization; Measure total area of piling (total length × total depth)

supply and install secant wall piling m2 210.00 to 265.00 Steel sheet piling; Measure total area of piling (total length × total depth)

interlocking steel sheet piling to excavation perimeter; Corus LX or similar; extraction on completion m2 140.00 to 170.00

Pile caps Excavate pit in firm ground by machine, partial backfill, partial disposal, support, compaction, cut off pile and prepare reinforcement, formwork; reinforced in situ concrete cap 25N/mm²; reinforcement at 50 kg/m³; rates per cap for cap size

900mm×900mm×1000mm; 1-2 piles nr 290.00 to 355.00 2100mm×2100mm×1000mm; 2-3 piles nr 930.00 to 1125.00 2700mm×2700mm×1500mm; 3-5 piles nr 2075.00 to 2550.00

Excavate pit in firm ground by machine, partial backfill, partial disposal, support, compaction, cut off pile and prepare reinforcement, formwork; reinforced in situ concrete cap 25N/mm²; reinforcement at 50 kg/m³; rates per m3 for typical cap size

up to 900mm×900mm×1000mm; 1-2 piles m3 335.00 to 410.00 up to 2100mm×2100mm×1000mm; 2-3 piles m3 215.00 to 260.00 up to 2700mm×2700mm×1500mm; 3-5 piles m3 190.00 to 235.00

extra for reinforcement at 75 kg/m³ concrete m3 69.00 to 85.00 reinforcement at 100 kg/m³ concrete m3 87.00 to 105.00 alternative strength concrete C30 (30.00N/mm²) m3 1.15 to 1.40 alternative strength concrete C40 (40.00N/mm²) m3 5.50 to 6.70

Concrete ground beams Reinforced in situ concrete ground beams; bar reinforcement; formwork

300mm×300mm, reinforcement at 180 kg/m³ m3 37.50 to 46.00 450mm×450mm, reinforcement at 200 kg/m³ m3 73.00 to 89.00 450mm×600mm, reinforcement at 270 kg/m³ m3 110.00 to 130.00

Precast concrete ground beams; square ends and dowelled. Supplied and installed in lengths to span between stranchion bases; concrete strength C50; maximum UDL of 4.5 kN/m; in situ work at beam ends not included.