Preston H. Roberts, Inc
Parent Company of The StoneShooter & Concrete Jack
Preston H. Roberts, IncThe StoneShooterConcrete Jackpicture zipPoolDeckLeveling.comSlabFloorLeveling.com
Notable Projects
Savings Examples
Capabilities
Shootable Materials
Site Requirements
Savings Examples

Job: Backfill a 200 foot long, 5 foot wide curbed median strip with 9 inches of topsoil
Material Requirements: 30 tons of topsoil

Traditional Method: Deliver topsoil with standard dump truck, and pay for truck to sit while wheeled excavator buckets material out of bed and fills median strip. Labor crew hand spreads and rakes material, does all backfilling near curb to prevent damage to new concrete.
Traditional Method Costs:
topsoil & delivery; $22.80/ton x 30 tons = $684.00
truck waiting; $70.00/hour x 2 hours = $140.00
excavator; $140.00/hour x 3 hours = $420.00
labor; 4 laborers x $30.00/hour x 3 hours = $360.00
Total Traditional Method Cost; $1604.00 ($53.47/ton)

The Stoneshooter: Deliver topsoil with The Stoneshooter, which arrives ready to unload itself. Driver uses remote control system to place topsoil without any chance of damaging new concrete. Laborer knocks down any small bumps in dirt, area is ready for seed.
The Stoneshooter Method Costs:
topsoil, delivery & shooting; $28.58/ton x 30 tons = $857.40
labor; 1 laborer x $30.00/hour x 3 hours = $90.00
Total The Stoneshooter Method Cost; $947.40 ($31.58/ton)

By calling The Stoneshooter, this project manager could have saved $656.60, or 40.9%

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Job: Spread 6 inches of stone over 2500 sq ft to prep for a basement concrete slab.
Material Requirements: 92.6 tons VDOT number 57 stone

Traditional Method: Deliver stone with standard dump trucks and dump on ground. Skid steer buckets material over walls or through walk out. Labor crew spreads majority of stone by hand. Large amounts (around 10%) of stone are lost on ground at drop site, or while bucketing around the house.
Traditional Method Costs:
stone & delivery; $28.27/ton x 102.88 tons = $2908.42
skid steer; $65.00/hour x 6 hours = $390.00
labor; 4 laborers x $30.00/hour x 6 hours = $720.00
Total Traditional Method Cost; $4,018.42 ($43.40/placed ton)

The Stoneshooter Method: The Stoneshooter arrives and positions itself on the lot. The operator uses a laser to set grade pins in the basement, and then uses the remote control system to stand in the basement and place the stone at his feet. The labor crew knocks down the bumps and cleans any stray stone out of the grade beams.
The Stoneshooter Method Costs:
stone, delivery & shooting; $34.05/ton x 92.6 tons = $3153.03
labor; 1 laborer x $30.00/hour x 3 hours = $90.00
Total The Stoneshooter Method Cost; $3,243.03 ($35.02/placed ton)

By calling The Stoneshooter, this concrete contractor could have saved $775.39, or 19.3%

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Job: Place 12” of sand under a 1,500 sq ft footprint pier house to replace eroded sand.
Material Requirements: 83.4 tons of sand

Traditional Method: Deliver sand with standard dump truck, dump on driveway in front of house. Bucket some material to edges of house with skid steer. Load wheelbarrows and push across plywood to fill areas under house not accessible by machines.
Traditional Method Costs:
sand & delivery; $15.00/ton x 83.4 tons = $1251.00
skid steer; $75.00/hour x 6 hours = $450.00
labor; 4 laborers x $30.00/hour x 6 hours = $720.00
Total Cost; $2421.00 ($29.03/ton)

The Stoneshooter: Stoneshooter arrives, sets grade targets and places sand to proper grades using remote control. Laborer rakes out sand to fill any shadows behind piers.
The Stoneshooter Method Costs:
sand, delivery & shooting; $18.00/ton x 83.4 tons = $1501.20
labor; 1 laborer x $30.00/hour x 5 hours = $150.00
Total Cost; $1651.20 ($19.80/ton)

By calling The Stoneshooter, this rental manager could have saved $769.80, or 31.8%


Preston H. Roberts, IncThe StoneShooterConcrete Jackpicture zipPoolDeckLeveling.comSlabFloorLeveling.com