Substructure

Raft foundations simple reinforced concrete raft on poorer ground for development up to two storey high m2 155.00 to 190.00

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

200mm thick waterproof concrete with 2 x layers of A252mesh reinforcement m2 71.00 to 86.00

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

200mm thick waterproof reinforced concrete m2 360.00 to 435.00

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 110.00 to 140.00 600mm×1500mm deep m 155.00 to 185.00

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

600mm×1000mm deep m 115.00 to 140.00 600mm×1500mm deep m 160.00 to 190.00

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

600mm×1000mm deep m 120.00 to 140.00 600mm×1500mm deep m 160.00 to 190.00

1 SUBSTRUCTURE – cont

Strip foundations – cont

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 120.00 to 150.00 600mm×1500mm deep m 160.00 to 200.00

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

600mm×1000mm deep m 130.00 to 155.00 600mm×1500mm deep m 170.00 to 205.00

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

600mm×1000mm deep m 130.00 to 160.00 600mm×1500mm deep m 170.00 to 205.00

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 120.00 to 145.00 900mm×900mm×450mm; 1250mm deep pit nr 190.00 to 230.00 1500mm×1500mm×600mm; 1500mm deep pit nr 480.00 to 580.00 2700mm x 2700mm x 1000mm; 1500mm deep pit nr 1875.00 to 2275.00

rates per m³ for base size 600mm×600mm×300mm; 1000mm deep pit m3 990.00 to 1175.00 900mm×900mm×450mm; 1250mm deep pit m3 540.00 to 650.00 1500mm×1500mm×600mm; 1500mm deep pit m3 370.00 to 450.00 2700mm×2700mm×1000mm; 1500mm deep pit m3 270.00 to 330.00 extra fro reinforcement at 75 kg/m³ concrete, base size m3 83.00 to 100.00 extra for reinforcement at 100 kg/m³ concrete, base size m3 105.00 to 125.00

Piling Enabling Works

excavate to form piling mat; supply and lay imported hardcore - recycled brick and similar to form piling mat m3 9.65 to 11.70 provision of plant (1nr rig); including bringing to and removing from site; maintenance, erection and dismantling at each pile position item 15000.00 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 44.00 to 53.00 600mm diameter reinforced concrete CFA piles m 71.00 to 85.00 750mm diameter reinforced concrete CFA piles m 110.00 to 130.00 900mm diameter reinforced concrete CFA piles m 155.00 to 190.00

Pile testing using tension piles as reaction; typical loading test 1000 kN to 2000 kN item 6700.00 to 8200.00 integrity testing; minimum 20 per visit nr 11.40 to 13.80

Secant wall piling, 750mm diameter piles' including site mobilisation and demobilisation; Measure total area of piling (total length x total depth)

supply and install secant wall piling m2 245.00 to 295.00 Steel sheet piling; Measure total area of piling (total length x total depth)

interlocking steel sheet piling to excavation perimeter; Corus LX or similar; extraction on completion m2 160.00 to 190.00

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

900mm×900mm×1000mm; 1 - 2 piles nr 360.00 to 440.00 2100mm×2100mm×1000mm; 2 - 3 piles nr 1175.00 to 1425.00 2700mm×2700mm×1500mm; 3 - 5 piles nr 2650.00 to 3200.00

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

up to 900mm×900mm x 1000mm; 1 - 2 piles m3 415.00 to 500.00 up to 2100mm×2100mm x 1000mm; 2 - 3 piles m3 270.00 to 330.00 up to 2700mm×2700mm x 1500mm; 3 - 5 piles m3 245.00 to 300.00

extra for reinforcement at 75 kg/m³ concrete m3 83.00 to 100.00 reinforcement at 100 kg/m³ concrete m3 100.00 to 125.00 alternative strength concrete C30 (30.00N/mm²) m3 1.40 to 1.70 alternative strength concrete C40 (40.00N/mm²) m3 7.10 to 8.60

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

300mm×300mm, reinforcement at 180 kg/m³ m 46.00 to 56.00 450mm×450mm, reinforcement at 200 kg/m³ m 90.00 to 110.00 450mm×600mm, reinforcement at 270 kg/m³ m 130.00 to 160.00

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.