Cost Estimation

The foreman of a installation project is in charge of measuring and documenting productivity for the various job functions. In the end of a job the number of hours documented by the foreman are compared to the estimate that was given in the initial job bid. If the number of hours it took to complete the job exceeds the estimate then the job lost money, or was at least not as profitable. It is important for the job foreman to identify steps that can be taken in order to avoid hours that exceed the estimate.

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Approximate Productivity Rates For Installing PICP:

Subbase: (Assume No. 2 stone at 12 in. thickness placed and compacted in two 6 in. lifts)

• Commercial parking lot: 60 tons/person/per hour

Base Installation and Compaction: 4" lift plus/minus 1/10 ft.

• Small backyard project (wheelbarrow delivery):  1 ton/person/hour
• Trucked in: 2.5 tons/person/hour
• Driveway: 3-4 tons/person/hour
• Commercial parking lot: 30 tons/person/hour

Screeding Bedding Materials:

• Manually with metal screed and rails/pipes: 100 sf/person/hour
• Screed beam worked manually on rails: 200 sf/person/hour
• Mechanical spreader with rollers on rails with powered equipment: 300 sf/person/hour
• Asphalt spreader with lasers (3 person crew): 500 sf/person/hour

Paver Installation and Compaction: (Including occasional compaction to correct local rutting from equipment)
Manually

• Small areas: 20 sf/person/hour
• Driveways: 40 sf/person/hour
• Large areas: 60 sf/person/hour 

Mechanically (crew of 3)

• Low: 150 sf/person/hour
• Average: 200 sf/person/hour
• High: 300 sf/person/hour

Installing edge restraints (into dense graded base borders): 30 ft/person/hour

Concrete Curbs: Typically used in commercial applications are assumed to be installed by others

Cutting Pavers: (Dry cutting; wet cutting will be lower)

• 6 cm thick pavers: 30 ft/person/hour
• 8 cm thick pavers: 20 ft/person/hour

Sweeping and filling joints/openings:

• Push broom/lute: 250 sf/person/hour
• Mechanical: 500 sf/person/hour

Estimation of Materials:

Sweeping Stone - #9-1/4":

• 6 cm AquaBric: 2 lbs/sf
• 8 cm AquaBricIV: 2.66 lbs/sf
• 8 cm EcoStone: 3 lbs/sf

Setting Bed - #8-3/8":

• 2" thick: 1700 lbs/100 sf
• 3" thick: 2550 lbs/100 sf

Base/Subbase:

• 1st choice: #2 (1-1/2") open graded stone
• 2nd choice: #57 (3/4") open graded stone
• 3rd choice: Processed gravel

Coverage:

• @ 6" thick: 3 tons/100 sf
• @ 8" thick: 4.5 tons/100 sf
• @ 12" thick: 6 tons/100 sf

Thickness: (minimum)

• Walkways: 6-8" thick
• Driveways: 8-12" thick
• Parking lots: 12-18" thick

Note: thickness will vary depending on type of sub-grade soil and hydrological requirements of site.