SUBSTRUCTURE

Machine excavation, disposal, plain insitu concrete 21 N/mm² - 20 WIDTH & DEPTH mm aggregate (1:2:4) trench fill, 300 mm high brickwork in cement OF CONCRETE mortar (1:3), pitch polymer damp proof course with common bricks 600x1200 750x1200 in:

half brick wall m £ 95.75 119.17 one brick wall m £ 109.21 130.30 cavity wall m £ 111.41 130.30

Strip foundations

Excavate trench, partial backfill, partial disposal, earthwork support WALL THICKNESS / (risk item), compact base of trench, plain in-situ concrete 21 N/mm² - FOOTING WIDTH / 20 mm aggregate (1:2:4) 250 mm thick, formwork, common BRICK BOND brickwork in cement mortar (1:3), pitch polymer damp proof One brick Cavity course 600 mm 750 mm

hand excavation, depth of wall English Stretcher 600 mm m £ 96.92 95.45 900 mm m £ 119.17 142.59 1200 mm m £ 153.71 181.54 1500 mm m £ 181.54 216.09

machine excavation, depth of wall 600 mm m £ 84.62 96.92 900 mm m £ 113.61 124.73 1200 mm m £ 135.86 159.28 1500 mm m £ 159.28 187.10

Extra over for three courses of facing bricks m £ 3.34 6.79

Column bases

Excavate pit in firm ground, partial backfill, partial disposal, earth DEPTH OF PIT work support, compact base of pit, plain in-situ concrete 21 N/m² - 20 mm aggregate (1:2:4), formwork 1200mm 1800mm

hand excavation, base size 600 x 600 x 300 mm nr £ 73.49 93.55 900 x 900 x 450 mm nr £ 150.35 174.80 1200 x 1200 x 450 mm nr £ 231.60 290.75 1500 x 1500 x 600 mm nr £ 417.68 486.78

machine excavation, base size 600 x 600 x 300 mm nr £ 57.97 72.47 900 x 900 x 450 mm nr £ 126.93 138.06 1200 x 1200 x 450 mm nr £ 186.07 209.35 1500 x 1500 x 600 mm nr £ 347.55 378.74

SUBSTRUCTURE - continued

Column bases - continued

Excavate pit in firm ground by machine, partial backfill, partial DEPTH OF PIT disposal, earthwork support, compact base of pit, reinforced in-situ concrete 21N/mm² - 20 mm aggregate (1:2:4), formwork 1200mm 1800mm

Reinforcement at 50 kg/m³ concrete, base size 1750 x 1750 x 500 mm nr £ 393.82 440.66 2000 x 2000 x 500 mm nr £ 486.05 546.07 2200 x 2200 x 600 mm nr £ 718.82 789.10 2400 x 2400 x 600 mm nr £ 834.48 904.75

Reinforcement at 75 kg/m³ concrete, base size 1750 x 1750 x 500 mm nr £ 417.24 462.62 2000 x 2000 x 500 mm nr £ 522.65 579.74 2200 x 2200 x 600 mm nr £ 753.96 811.06 2400 x 2400 x 600 mm nr £ 882.79 950.14

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/m³ concrete, cap size 900 x 900 x 1400 mm, one pile nr £ 370.39 393.82 2700 x 900 x 1400 mm, two piles nr £ 926.71 950.14 *2700 x 2475 x 1400 mm, three piles nr £ 1682.14 1739.23 2700 x 2700 x 1400 mm, four piles nr £ 2144.76 2217.96 3700 x 2700 x 1400 mm, six piles nr £ 2898.72 3067.08

Reinforcement at 75 kg/m³ concrete, cap size 900 x 900 x 1400 mm, one pile nr £ 370.39 392.35 2700 x 900 x 1400 mm, two piles nr £ 926.71 983.81 *2700 x 2475 x 1400 mm, three piles nr £ 1704.10 1851.96 2700 x 2700 x 1400 mm, four piles nr £ 2316.05 2343.86 3700 x 2700 x 1400 mm, six piles nr £ 3067.08 3248.62 * = triangular on plan, overall size given

30 N/m³ 40 N/m³ Additional cost of alternative strength concrete m³ £ 1.61 3.95

Strip or base foundations

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

shallow foundations per m² ground floor plan area m² £ 69.10 to £ 92.96 deep foundations per m² ground floor plan area m² £ 115.80 to £ 138.64

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

shallow foundations per m² ground floor plan area m² £ 80.81 to £ 126.93 deep foundations per m² ground floor plan area m² £ 126.93 to £ 197.64 Extra for each additional storey m² £ 27.82 to £ 32.35

Raft foundations

Raft on poor ground for development one storey per m² ground floor plan area m² £ 92.96 to £ 161.48 two storey per m² ground floor plan area m² £ 149.77 to £ 220.48 Extra for each additional storey m² £ 27.82 to £ 32.35

Piled foundations

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

short bore piles to columns only m² £ 115.80 to £ 174.80 short bore piles m² £ 149.77 to £ 197.64 fully piled m² £ 197.64 to £ 277.28

Ground slabs

Mechanical excavation to reduce levels, disposal, level and compact, hardcore bed blinded with sand, 1200 gauge polythene damp proof membrane, concrete 21.00N/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 : 150 mm m² £ 46.85 55.63 72.47 175 mm m² £ 49.04 57.97 74.66 200 mm m² £ 49.04 57.97 74.66

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 £ 4.68 4.68 4.68 A142 (2.22 kg/m²); 2 layers m² £ 6.88 8.05 8.05 A193 (3.02 kg/m²); 1 layer m² £ 4.68 4.68 5.86 A193 (3.02 kg/m²); 2 layers m² £ 8.05 9.37 9.37 A252 (3.95 kg/m²); 1 layer m² £ 5.86 5.86 6.88 A252 (3.95 kg/m²); 2 layers m² £ 9.37 10.54 11.57 A393 (6.16 kg/m²); 1 layer m² £ 6.88 6.88 8.05 A393 (6.16 kg/m²); 2 layers m² £ 13.76 13.76 13.76

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

25 kg/m³ m² £ 5.86 9.37 12.74 50 kg/m³ m² £ 10.54 16.25 24.30 75 kg/m³ m² £ 16.25 23.42 34.70 100 kg/m³ m² £ 20.94 30.01 46.56