Preparing the Foundation

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Taken in late September, this picture shows the interior of the building being prepared with electrical conduit and plumbing drain lines which will have the concrete slab poured over top of them to form the primary foundation for the building.

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The gray colored pipes are the conduit used to run electrical wire and the white colored PVC pipes are the plumbing drain lines.

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These four (4) large electrical conduits are being run under the exterior foundation wall of the building to bring the primary power from the main electrical service lines from the local power company, Dominion Power. This conduit will house the main power lines from the electrical meter outside the building bringing power to inside the building to supply all of the building’s electrical power needs.

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This is the main water supply line that is coming into the building from the local county main water line. This line will supply all of the building’s water needs.

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This picture was taken the first week of October after the safety bollards were installed in the garage area. These bollards protect the equipment and other structures within the garage from accidentally being hit by a bus entering or leaving the maintenance bay area. Notice the increase in plumbing and conduit in the background as the slab preparations continue.

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Our construction manager, Jerry Walker, inspects the ongoing placement of plumbing and conduit as the slab preparations continue.

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With the conduit and plumbing below the slab area now completed; the entire area is graded and filled in with gravel in preparation for the vapor barrier which will come next.

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In the background the concrete crew uses a conveyor belt to place gravel in the garage area.

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As the conveyor truck sits waiting to dispense more gravel into the garage area, Jerry Walker, discusses some last minute plumbing changes required by the County with the plumbing subcontractor.

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Although the same amount of gravel gets used in the garage area as in the office section, the garage area concrete slab will be twice as thick as the office section in order to handle the heavy bus traffic coming in and out of the maintenance bays.

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Taken October 8th, the final preparations for pouring the concrete are underway. The green plastic material acts as a vapor barrier and will control moisture coming up from the ground and entering into the foundation and building area.

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The concrete crew continues to layout the vapor barrier. Each sheet must be taped together and all holes around the plumbing and conduit must be taped off completely to be moisture tight.

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Almost ready for the concrete pour to create the slab, the building will be poured into two sections. The office section will be poured first and then the garage section will be poured sometime afterward. The garage section will require much more reinforced steel in order to handle the heavy weight of the buses and the constant traffic in and out of the maintenance bays for service.

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Ready to pour!! Weather permitting the concrete trucks will start rolling in at 5am.

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Pour day!! October 16th 6:45am and slab is almost complete! The concrete crew work swiftly to get all of the concrete poured and begin the smoothing and finishing process.

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Concrete trucks roll in onsite, steadily bringing concrete to the conveyor truck. The concrete trucks back right up to the conveyor and pour concrete directly onto the conveyor belt.

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The conveyor belt is mobile so that it can reach out in any direction to dispense concrete where it is needed.

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Crews work closely with the conveyor belt to spread and smooth the concrete as it is poured into the slab area.

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Two days after the slab was poured the concrete has hardened. It will continue to cure and harden for at least seven more days before the construction team will begin to install the steel structure that will support the building.

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