Page 55 - 2018 National Home Improvement

2018 National Home Improvement Estimator, All Rights Reserved Page 40

Concrete Flatwork
Most concrete work on home improvement jobs will be slabs such as sidewalks, driveways and floors.
All concrete flatwork requires fine grading, edge forms, concrete pouring, and finishing.

4" thick concrete slab. Typical cost for a 100-square-foot slab, based on costs in this chapter. Use the
figures that follow to adjust for other conditions: grading, base, forms, concrete thickness, concrete mix
characteristics and finishing.
Fine grading and shaping, 100 SF BL@.800 CSF -- 26.10 26.10
Aggregate 4" base (1.23 CY per CSF) BL@.600 CSF 47.47 19.57 67.04
Lay out and set edge forms, 50 LF, 1 use B2@2.50 50LF 57.57 94.28 151.85
.006" polyethylene vapor barrier B5@.118 CSF 8.08 4.70 12.78
Place W2.9 x W2.9 x 6" x 6" mesh, 100 SF RI@.400 CSF 45.45 16.93 62.38
Place ready-mix concrete, from chute 1.25 CY B5@.540 CSF 151.50 21.52 173.02
Steel trowel finish B6@1.00 CSF -- 35.40 35.40
Acrylic concrete cure and seal B6@.300 CSF 21.21 10.62 31.83
Strip edge forms, 50 LF, no re-use BL@.600 50LF -- 19.57 19.57
Total job cost for 4" thick 100 SF slab --@6.85 CSF 331.28 -- 331.28
Cost per SF for 4" thick 100 SF job --@.600 SF 3.31 -- 3.31

Excavation and Backfill by Hand. Using hand tools.
General excavation, using a pick and shovel (loosening and one throw)
Light soil BL@1.10 CY -- 35.88 35.88
Average soil BL@1.70 CY -- 55.45 55.45
Heavy soil or loose rock BL@2.25 CY -- 73.40 73.40
Backfilling (one shovel throw from stockpile)
Sand BL@.367 CY -- 11.97 11.97
Average soil BL@.467 CY -- 15.23 15.23
Rock or clay BL@.625 CY -- 20.39 20.39
Add for compaction, average soil or sand BL@.400 CY -- 13.05 13.05
Fine grading BL@.008 SF -- 0.26 0.26
Footings, average soil, using a pick and shovel
6" deep x 12" wide (1.85 CY per CLF) BL@.034 LF -- 1.11 1.11
8" deep x 12" wide (2.47 CY per CLF) BL@.050 LF -- 1.63 1.63
8" deep x 16" wide (3.29 CY per CLF) BL@.055 LF -- 1.79 1.79
8" deep x 18" wide (3.70 CY per CLF) BL@.060 LF -- 1.96 1.96
10" deep x 12" wide (3.09 CY per CLF) BL@.050 LF -- 1.63 1.63
10" deep x 16" wide (4.12 CY per CLF) BL@.067 LF -- 2.19 2.19
10" deep x 18" wide (4.63 CY per CLF) BL@.075 LF -- 2.45 2.45
12" deep x 12" wide (3.70 CY per CLF) BL@.060 LF -- 1.96 1.96
12" deep x 16" wide (4.94 CY per CLF) BL@.081 LF -- 2.64 2.64
12" deep x 20" wide (6.17 CY per CLF) BL@.100 LF -- 3.26 3.26
12" deep x 24" wide (7.41 CY per CLF) BL@.125 LF -- 4.08 4.08
16" deep x 16" wide (6.59 CY per CLF) BL@.110 LF -- 3.59 3.59
Loading trucks (shoveling, one throw)
Average soil BL@1.45 CY -- 47.30 47.30
Rock or clay BL@2.68 CY -- 87.42 87.42
Pits to 5'. Pits over 5' deep require special consideration: shoring, liners and a way to lift the soil.
Light soil BL@1.34 CY -- 43.71 43.71
Average soil BL@2.00 CY -- 65.24 65.24
Heavy soil BL@2.75 CY -- 89.71 89.71
Shaping trench bottom for pipe
To 10" pipe BL@.024 LF -- 0.78 0.78
12" to 20" pipe BL@.076 LF -- 2.48 2.48