A rectangular, reinforced-concrete utility vault for fiber-optics communication equipment has a gross area of 1800 square...

 

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A rectangular, reinforced-concrete utility vault for fiber-optics communication equipment has a gross area of 1800 square feet, with the length of the vault being two times its width. The walls are 15-in thick and 10-ft high with #6 Gr 60 rebar at 12-in O.C., maximum, both horizontally and vertically. The door is 4'-0" by 7'-0" and centered on one of the walls. The roof is 7-in thick and sits atop the walls. It is reinforced with #6 Gr 60 rebar at 12-in O.C, maximum, in both directions. The slab-on-grade floor is 6-in thick with a toedown as shown below and will be formed. The slab is reinforced with 6 x 6-10 x 10 WWM in the slab and three # 5 Gr 40 rebar, running continuous, in the toedown. Add 10% to the net-in-place WWM quantity for the overlap. The concrete is specified as 4000 psi, air-entrained, with 2 pounds of polypropylene fibers per CY. The sales tax rate is 7.875%. Use the values in Figure 11.2 to price the concrete. Assume summer conditions. A concrete pump truck is used to place the concrete. It rents for $280 per hour, which includes the driver's wage and travel time. The one-way distance is 12 miles to the jobsite and the truck's average speed is 40 miles per hour. The pump truck time is measured in 15-minute intervals. Prepare an estimate for this work that includes the cost of the concrete, setting the formwork, setting the reinforcement, placing the concrete, stripping the forms for reuse and finishing the slab with a steel trowel. Assume median value productivity. Labor hourly wages are shown below and must be calculated in full hours. 18 inches # 5 Gr 40 rebar (typ 3 places) 15 inches 6 in 6 inches WWM Mix 12445 ABC CONCRETE PRODUCTS, INC. PROJECT: XYZ Office Building. Townville We are pleased to quote you as follows for the supply of readymis delivered to the for Type Strength (psi) 3000 3500 4000 4500 5000 Aggregate Size 3/4" 3/4" 3/4" 3/4 3/4" Basic Hourly Wage Cement Type The above prices are based on ABC Concrete's standard mix designs All products are subject to a municipal sales tax of 7%. For 1/2" aggregates add $6.50 per CY to the above prices. For polypropylene fibers add $17.00 for 2 lbs. per CY. For pigments (red, black, tan, or brown) add $5.50 per CY. EXTRA CHARGES: Calcium Chloride (1%): Calcium Chloride (2%): Winter Heat between November 25 and March 15: Environmental Fee: Equipment operator Operator foreman Truck driver Skilled worker Laborer Labor foreman Cement finisher Carpenter Carp foreman Rodman Rodman foreman Delivered Price per CY 0.02 $120.00 $135.00 $140.00 $150.00 $155.00 $54.00 $59.00 $45.00 $42.50 $40.00 $44.00 $46.00 $5.00 $50.00 $55.00 $52.00 $57.00 11.2 Concrete Materials Price Quote Example Delmar/Cengage Learni $6.50 $7.50 $4.00 $5.00 $3.00 Per CY $6.00 Per CY $12.00 Per CY $3.00 Per CY ucting the A rectangular, reinforced-concrete utility vault for fiber-optics communication equipment has a gross area of 1800 square feet, with the length of the vault being two times its width. The walls are 15-in thick and 10-ft high with #6 Gr 60 rebar at 12-in O.C., maximum, both horizontally and vertically. The door is 4'-0" by 7'-0" and centered on one of the walls. The roof is 7-in thick and sits atop the walls. It is reinforced with #6 Gr 60 rebar at 12-in O.C, maximum, in both directions. The slab-on-grade floor is 6-in thick with a toedown as shown below and will be formed. The slab is reinforced with 6 x 6-10 x 10 WWM in the slab and three # 5 Gr 40 rebar, running continuous, in the toedown. Add 10% to the net-in-place WWM quantity for the overlap. The concrete is specified as 4000 psi, air-entrained, with 2 pounds of polypropylene fibers per CY. The sales tax rate is 7.875%. Use the values in Figure 11.2 to price the concrete. Assume summer conditions. A concrete pump truck is used to place the concrete. It rents for $280 per hour, which includes the driver's wage and travel time. The one-way distance is 12 miles to the jobsite and the truck's average speed is 40 miles per hour. The pump truck time is measured in 15-minute intervals. Prepare an estimate for this work that includes the cost of the concrete, setting the formwork, setting the reinforcement, placing the concrete, stripping the forms for reuse and finishing the slab with a steel trowel. Assume median value productivity. Labor hourly wages are shown below and must be calculated in full hours. 18 inches # 5 Gr 40 rebar (typ 3 places) 15 inches 6 in 6 inches WWM Mix 12445 ABC CONCRETE PRODUCTS, INC. PROJECT: XYZ Office Building. Townville We are pleased to quote you as follows for the supply of readymis delivered to the for Type Strength (psi) 3000 3500 4000 4500 5000 Aggregate Size 3/4" 3/4" 3/4" 3/4 3/4" Basic Hourly Wage Cement Type The above prices are based on ABC Concrete's standard mix designs All products are subject to a municipal sales tax of 7%. For 1/2" aggregates add $6.50 per CY to the above prices. For polypropylene fibers add $17.00 for 2 lbs. per CY. For pigments (red, black, tan, or brown) add $5.50 per CY. EXTRA CHARGES: Calcium Chloride (1%): Calcium Chloride (2%): Winter Heat between November 25 and March 15: Environmental Fee: Equipment operator Operator foreman Truck driver Skilled worker Laborer Labor foreman Cement finisher Carpenter Carp foreman Rodman Rodman foreman Delivered Price per CY 0.02 $120.00 $135.00 $140.00 $150.00 $155.00 $54.00 $59.00 $45.00 $42.50 $40.00 $44.00 $46.00 $5.00 $50.00 $55.00 $52.00 $57.00 11.2 Concrete Materials Price Quote Example Delmar/Cengage Learni $6.50 $7.50 $4.00 $5.00 $3.00 Per CY $6.00 Per CY $12.00 Per CY $3.00 Per CY ucting the

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Here are the stepbystep calculations 1 Vault Dimensions Length 2 Width Width Length2 18002 90 ft 2 Formwork Areas Walls Length Width Height 2 90 90 10 ... View the full answer