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Concrete Work, Formwork

Common labour factors for Concrete Work, Formwork.

For a feasibility study, your Insitu Concrete breakdown is 15% labour, 80% materials and 5% fixed costs,
and your Formwork breakdown is 80% labour, 20% materials and 0% fixed costs.

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Concrete
Description
Man Hours
Unit

unreinforced readymix, placed in




Blinding layer 50mm thick


2.20
hrs/m3

Column and pier foundations


1.20
hrs/m3

Strip footings


1.30
hrs/m3
  • Continuous concrete footings

    • 2.50
    hrs/m3
  • Small section continuous concrete footings under 300mm x 150mm or short sections of footings

    • 5.00
    hrs/m3

    reinforced readymix, placed in




    Column and pier foundations


    1.50
    hrs/m3

    Strip footings


    1.60
    hrs/m3

    Slabs and thickenings on fill


    1.75
    hrs/m3

    Suspended slabs 150/300mm thick


    2.00
    hrs/m3

    Walls 150/300mm thick


    2.00
    hrs/m3

    Columns


    2.90
    hrs/m3

    Attached beams


    2.25
    hrs/m3

    Isolated beams


    3.00
    hrs/m3

    Stairs and landings


    3.90
    hrs/m3

    Surface Finishes




    Hand Trowel


    0.15
    hrs/m2

    Power Float


    0.18
    hrs/m2

    Broomed Finish


    0.12
    hrs/m2

    Joints




    Keyed construction joint in




    150mm slab


    0.30
    hrs/m

    300mm slab


    0.35
    hrs/m

    Expansion joint in




    300mm slab


    0.60
    hrs/m

    150mm slab


    0.50
    hrs/m

    100mm and 125mm thick foundation walls


    5.00
    hrs/m3

    150mm wall


    0.60
    hrs/m

    150mm thick foundation walls


    4.50
    hrs/m3

    200mm thick foundation walls


    4.00
    hrs/m3

    300mm wall


    0.70
    hrs/m

    Attached piers to walls


    5.00
    hrs/m3

    Isolated piers and piles


    8.00
    hrs/m3

    Waterstops




    Waterstop, double bulb, cast in, excluding angles and intersections




    150mm wide


    0.25
    hrs/m

    200mm wide


    0.28
    hrs/m

    Concrete (Hand)




  • Large isolated pads

    • 2.50
    hrs/m3
  • Small isolated pads under 450mm x 450mm

    • 4.00
    hrs/m3
  • 75mm and 100mm concrete slabs

    • 2.50
    hrs/m3
  • Floating off slabs

    • 0.18
    hrs/m2
  • Small areas of slab

    • 4.00
    hrs/m3
  • Steps and supporting dwarf walls

    • 5.00
    hrs/m3
  • Large concrete beams

    • 6.50
    hrs/m3
  • Small concrete beams under 300 x 300mm

    • 13.00
    hrs/m3
  • Concrete filling to 200 x 200mm blockwork bond beams

    • 49.00
    hrs/m3
  • Concrete filling to 400 x 200mm blockwork bond beams

    • 73.00
    hrs/m3
  • Concrete filling to 250 x 200mm blockwork bond beams

    • 53.00
    hrs/m3
  • Concrete filling to cores in 200mm blockwork (per 100 lin metres of core)

    • 55.00
    hrs/m3
  • 100 x 100mm and 75 x 75mm concrete nibs to porch slabs

    • 16.00
    hrs/m3
  • Boxing to footings and pads

    • 1.30
    hrs/m2
  • Boxing to 100mm and 125mm foundation walls

    • 1.60
    hrs/m2
  • Boxing to 150mm walls

    • 2.20
    hrs/m2
  • Boxing to 200mm walls

    • 2.70
    hrs/m2
  • Boxing to attached piers at walls

    • 3.30
    hrs/m2
  • Boxing to piles standard lenghts

    • 1.00
    hrs/m2
  • Boxing to piles irregular lenghts

    • 1.30
    hrs/m2
  • Boxing to tall piers and columns over 1 metre high

    • 1.60
    hrs/m2
  • Boxing to soffit of slabs less than 1 metre from ground

    • 2.20
    hrs/m2
  • Boxing to soffit of slab over 1 metre but under 1.5 metres from ground

    • 2.70
    hrs/m2
  • Boxing to soffit of slab over 1.5 metres from ground

    • 3.30
    hrs/m2
  • Boxing to edges of 75mm and 100mm slabs

    • 26.00
    hrs/100 lineal metres
  • Soffit of slabs in small areas

    • 4.95
    hrs/m2
  • Soffits of suspended steps as per rate for slabs

    • 1.95
    hrs/m2
  • Risers to steps

    • 33.00
    hrs/100 lineal metres
  • Edges of steps including profile cutting

    • 3.30
    hrs/m2
  • Soffits and sides of large concrete beams (supports up to 1 metre high)

    • 3.30
    hrs/m2
  • Soffits and sides of large concrete beams (support over 1 metre high)

    • 3.80
    hrs/m2
  • Sides only of large beams

    • 2.70
    hrs/m2
  • Soffits and sides of small beams

    • 2.70
    hrs/m2
  • Sides only small beams

    • 2.20
    hrs/m2
  • Raking beams - rate as per level beams

    • 3.38
    hrs/m2
  • Stop ends to walls sides of openings to walls

    • 40.00
    hrs/100 lineal metres
  • Soffits of openings in walls

    • 60.00
    hrs/100 lineal metres
  • Form openings for vents

    • 15.00
    hrs/100 No.
  • Build in holding down bolts

    • 6.00
    hrs/100 No.
  • Build in galv. wire ties

    • 3.00
    hrs/100 No.
  • Form large rebates and chases

    • 20.00
    hrs/100 lineal metres
  • form small rebates and chases planted fillets

    • 10.00
    hrs/100 lineal metres
    Formwork
    Description
    Man Hours
    Unit

    Constants assume five uses of formwork.
    Where the number of uses is less, the constants should be adjusted by the percentage shown:




  • Four uses
    • Add +2.5%


  • Three uses
    • Add +6.0%


  • Two uses
    • Add +12.5%


  • One use
    • Add +20.0%


    Rates include fabrication, fixing in place and striking.




    Formwork to sides of

    Surface Finish


    Column/pier foundations

    F1
    1.20
    hrs/m2

    Strip footing

    F1
    1.20
    hrs/m2

    Attached beam

    F4
    2.45
    hrs/m2

    Column

    F4
    2.90
    hrs/m2
    F1
    2.65
    hrs/m2

    Lintels and beams

    F4
    3.50
    hrs/m2
    F4
    3.25
    hrs/m2

    Wall

    F4
    2.60
    hrs/m2
    F1
    2.20
    hrs/m2

    Formwork to soffit of




    Suspended slab

    F4
    2.35
    hrs/m2
    F1
    2.00
    hrs/m2

    Stairs and landings

    F4
    4.00
    hrs/m2
    F1
    3.50
    hrs/m2

    Formwork to edges, vertical or horizontal




    0–100mm high

    F4
    0.75
    hrs/m

    100–200mm high

    F4
    0.75
    hrs/m

    200–300mm high

    F4
    1.00
    hrs/m

    Form groove




    25mm x 25mm


    0.17
    hrs/m

    Form rebate




    100mm x 50mm


    0.27
    hrs/m

    Form hole/opening in concrete 100/200mm thick, size:




    100mm x 100mm


    0.32
    hrs/item

    300mm x 300mm


    0.54
    hrs/item

    500mm x 500mm


    0.80
    hrs/item

    Form hole/opening in concrete 200/300mm thick, size:




    100mm x 100mm


    0.40
    hrs/item

    300mm x 300mm


    0.67
    hrs/item

    500mm x 500mm


    0.87
    hrs/item

    Tube formers, cardboard, including stripping




    300mm ID (internal diameter)


    1.27
    hrs/m

    500mm ID


    1.53
    hrs/m

    Spirally wound plastic tube, including stripping




    300mm ID


    1.34
    hrs/m

    500mm ID


    1.60
    hrs/m

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