Estimating in Building Construction

232 CHAPTER TWENTY-ONE

EXAMPLE 21-7 ASSEMBLY ESTIMATING USING RS
MEANS

Determine the costs for 50 100 warehouse excluding site work.
The costs for each assembly are as follows:

$28,600

Overhead doors (12¿ 12 ¿) 8 ea$3,575 per door

Exterior doors (3¿ 6 ¿ 8 – ) 4 ea$1,425 per door$5,700

Joist, deck, and beams5,000 sf$5.27 per sf$26,350

Steel columns (wide flanged) 75 ¿$25.45 per ft$1,909

$61,050

Block walls (8– 8 –  16 – ) 25 ¿ 300 ¿$8.14 per sf

Floor slab (6– reinforced)5,000 sf$6.14 per sf$30,700

Spread footings (4¿ 6 –  4 ¿ 6 – )3 ea$273 per each$819

Footings (24– 12 – ) 300 ¿$30.95 per foot$9,285

Total$239,653 — Use $240,000 

Lighting (HID)5,000 sf$4 .46 per sf$22,300

Electrical service (200 A) 1 ea$2,725 per ea$2,725

$15,900

Fire sprinklers (ordinary hazard)5,000 sf$3.18 per sf

$2,400

Bathroom (toilet and sink) 1 ea$2,400 per bathroom

Roof hatch (2¿ 6 –  3 ¿) 1 ea$777 per hatch$777

Skylights (4¿ 4 ¿) 32 ea 16 sf$24 per sf$12,288

Roofing5,000 sf$2.40 per sf$12,000

Roof insulation (3–)5,000 sf$1.37 per sf$6,850

Web Resources

http://www.rsmeans.com

Review Questions

1. How would you determine the costs for a project using
   the project comparison method?


2. How would you determine the costs for a project using
   the square-foot method and in-house cost data?


3. What are some of the ratios that you would use to pre-
   pare a line-by-line square-foot estimate?
   4. Determine the following using Figure 21.2:
   a.Base cost per square foot for a 40,000-sf, tilt-up con-
   crete warehouse.
   b.Base cost per square foot for a 57,000-sf, tilt-up con-
   crete warehouse.
   c.Base perimeter for a 50,000-sf warehouse.
   d.Perimeter adjustment for a 25,000-sf warehouse.
   e.Story height adjustment for a 15,000-sf warehouse.
   f. Added cost for a 70-foot-high aluminum flagpole.
   5. What components would you include in an exterior
   wall assembly for a residence?