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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

https://brainmass.com/economics/estimation-and-forecasting/construction-cost-estimate-trusses-columns-591011

#### Solution Preview

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