Estimating in Building Construction

230 CHAPTER TWENTY-ONE

FIGURE 21.3.Warehouse

Square Foot Costs.

From Means Square Foot Cost

Data 2007. Copyright RS Means,

Kingston, MA 781-585-7880; All

rights reserved

From Figure 21.3, the base story height is 24; and from Figure 21.2,
the adjustment for story height is $0.40 per sf per foot of height.

From Figure 21.2, the added cost for a 7 8 dock leveler is $6,225
per leveler.

$2,496,600 — Use $2,500,000 

Total cost$2,471,700$24,900

Dock levelers 4 ea$6,225 per ea$24,900

Base cost ($)30,000 sf$82 .39 per sf$2,471,700

Base cost ($>sf)$82 .39 per sf

Base cost ($>sf)$79 .15 per sf$0 .84 per sf$2 .40 per sf

$2.40 per sf

Add for story height ($>sf)(30¿ 24 ¿)$0 .40 per sf per ft

$2.10 per sf per 100 lf$0.84 per sf

Add for Perimeter ($>sf )(740¿ 700 ¿)> 100 ¿ 21–4 ASSEMBLY ESTIMATING

In assembly estimating, rather than bidding each compo-

nent separately, the components are grouped into assem-

blies, consisting of items that would be installed together

(but not necessarily by the same trade), and then the assem-

bly is bid as a single component. For example, the cost per

linear foot for an 8-foot-high interior wall (consisting of

track, metal studs, insulation, drywall, and paint) may be

determined. Then all 8-foot-high interior walls may be bid

by the linear foot rather than by bidding the track, metal

studs, drywall, insulation, and paint separately.

To create an assembly, the estimator determines the

quantity of materials needed for one unit of the assembly,

linear foot of wall in the case of the interior wall. From these

quantities, the cost for materials, equipment, and labor to

construct one unit of the assembly is then determined. This