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    Construction Cost Estimate - Trusses and Columns

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    A small steel frame structure is to be erected and you are to prepare an estimate of the cost based on the data given below and the assumptions provided.

    Assumptions: the unloading, erection, temporary bolting, and plumbing will be done by a crew of 1 foreman, 1 crane operator, and 4 structural steel workers with 55 ton crawler crane. The bolting will be done by 2 structural steel workers using power tools. The painting will be done by a crew of 3 painters (structural steel) with spray equipment. For unloading at site, erection, temporary bolting, and plumbing, allow 7 labor-hours per ton for the roof trusses, and allow 5.6 labor-hours per ton for remaining steel. Assume 60 crew hours will be required for bolting. Allow 1.11 labor-hours per ton for painting.

    Materials A36 Structural steel Trusses 15tons
    Columns, etc. 50tons

    Costs: Structural steel supply: $0.22/#
    Fabrication: $450/ton - trusses: $250/ton - other steel
    Freight cost: $1.65/100#
    Field bolts: 250 @ $0.66 each
    Paint: 41 gallons @ $16/gallon
    Labor costs: assume payroll taxes and insurance are 80% of labor wage, use the following:
    Foreman $24.10
    Crane operator $21.10
    Structural steel worker $22.10
    Painter $20.20

    Equipment costs:
    Crane $915/day
    Power tools $23.40/day
    Paint equipment $68/day
    Move-in/out $300

    Overhead: 40% of field labor cost
    Profit: 12% of all costs

    © BrainMass Inc. brainmass.com October 10, 2019, 7:41 am ad1c9bdddf
    https://brainmass.com/economics/estimation-and-forecasting/construction-cost-estimate-trusses-columns-591011

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    Solution:
    Materials:
    Structural steel: 65 * 2000 *.22 = 28,600
    Freight: 65 * 2000/100 * 1.65 = 2145
    Field bolts: 250 * 0.66 = 165
    Paint: 41 * 16 = 656
    Total Materials $ 31,566

    Fabrication:
    Truss: 15 * 450 = 6,750
    Frame: 50 * 250 = 12,500
    Total Fabrication $ 19,250

    Labor ...

    Solution Summary

    The solution has detailed step by step calculations of all the components of the construction cost estimate. Equipment costs are provided for the trusses ad columns.

    $2.19