Substructure

Excavate pit In firm ground by machine, partial backfill, partial DEPTH OF PIT disposal, earthwork support, compact base of pit, reinforced Insitu concrete 21 N/mffi2 - 20 mm aggregate (1 :2:4), formwork 1200rnm 1800mm

Reinforcement at 50 kg/rna concrete, base size 1750 x 1750 x 500 mm nr £ 304.78 341.03 2000 x 2000 x 500 mm nr £ 376.16 422.61 2200 x 2200 x 600 mm nr £ 556.30 610.69 2400 x 2400 x 600 mm nr £ 645.81 700.19 Reinforcement at 75 kg/rna concrete, base size 1750 x 1750 x 500 mm nr £ 322.91 358.03 2000 x 2000 x 500 mm nr £ 404.48 448.67 2200 x 2200 x 600 mm nr £ 583.50 627.68 2400 x 2400 x 600 mm nr £ 683.20 735.32

Pile caps

Excavate pit In firm ground by machine, partial backfill, partial disposal, earthwork support, compact base of pit, cut off top of pile DEPTH OF PIT and prepare reinforcement, reinforced insitu concrete 26 N/mM2 - 1500mm 2100mm 20 mm aggregate(1 :2:4), formwork

Reinforcement at 50 kg/rna concrete, cap size 900 x 900 x 1400 mm, one pile nr £ 286.65 304.78 2700 x 900 x 1400 mm, two piles nr £ 717.19 735.32 *2700 x 2475 x 1400 mm, three piles nr £ 1301.82 1346.00 2700 x 2700 x 1400 mm, four piles nr £ 1659.85 1716.50 3700 x 2700 x 1400 mm, six piles nr £ 2243.34 2373.64 Reinforcement at 75 kg/ma concrete, cap size 900 x 900 x 1400 mm, one pile nr £ 286.65 303.64 2700 x 900 x 1400 mm, two piles nr £ 717.19 761.38 *2700 x 2475 x 1400 mm, three piles nr £ 1318.81 1433.25 2700 x 2700 x 1400 mm, four piles nr £ 1792.41 1813.93 3700 x 2700 x 1400 mm, six piles nr £ 2373.64 2514.13 * = triangular on plan, overall size given

30 N/rna 40 N/rna Additional cost of alternative strength concrete rna £ 1.25 3.06

Foundations in good ground; reinforced concrete bed; for one storey development

shallow foundations per ffi2 ground floor plan area ffi2 £ 53.48 tot 71.95 deep foundations per ffi2 ground floor plan area ffi2 £ 89.62 to £ 107.30

storey development

shallow foundations per m2 ground floor plan area m2 £ 62.54 to £ 98.23 deep foundations per m2 ground floor plan area m2 £ 98.23 to £ 152.96 Extra for each additional storey m2 £ 21.53 to £ 25.04

Raft foundations

Raft on poor ground for development one storey per m2 ground floor plan area m2 £ 71.95 to £ 124.97 two storey per m2 ground floor plan area m2 £ 115.91 to £ 170.63 Extra for each additional storey m2 £ 21.53 to £ 25.04

Piled foundations

Foundations in poor ground; reinforced concrete slab; for one storey commercial development per m2 ground floor plan area

short bore plies to columns only m2 £ 89.62 to £ 135.28 short bore pUes m2 £ 115.91 to £ 152.96 fully piled m2 £ 152.96 to £ 214.59

Ground slabs

Mechanical excavation to reduce levels, disposal, level and compact, hardcore bed blinded with sand, 1200 gauge polythene damp proof membrane, concrete 21.ooN/mm2 - 20 mm aggregate THICKNESS OF SLAB (1 :2:4) ground slab, tamped finish 200mm 300mm 450mm

thickness of hardcore bed per m2 ground floor plan area : 150mm m2 £ 36.26 43.05 56.08 175mm m2 £ 37.96 44.87 57.78 200mm m2 £ 37.96 44.87 57.78

Add to the foregOing prices for fabric reinforcement BS 4483, lapped; per m2 ground floor plan area A142 (2.22 kg/m2); 1 layer m2 £ 3.63 36.26 3.63 A142 (2.22 kg/m2); 2 layers m2 £ 5.33 6.23 6.23 A193 (3.02 kg/m2); 1 layer m2 £ 3.63 3.63 4.53 A193 (3.02 kg/m2); 2 layers m2 £ 6.23 7.25 7.25 A252 (3.95 kg/m2); 1 layer m2 £ 4.53 4.53 5.33 A252 (3.95 kg/m2); 2 layers m2 £ 7.25 8.16 8.95 A393 (6.16 kg/lJI2); 1 layer m2 £ 5.33 5.33 6.23 A393 (6.16 kg/lJI2); 2 layers m2 £ 10.65 10.65 10.65

High yield bent bar reinforcement BS 4449 ; per m2 ground floor plan THICKNESS OF SLAB area at a rate of 200mm 300mm 450mm

25kg/ma m2 £ 4.53 7.25 9.86 50 kg/rna m2 £ 8.16 12.58 18.81 75 kg/rna m2 £ 12.58 18.13 26.85 100 kg/rna m2 £ 16.20 23.23 36.03