Please answer the questions using the case described below. To answer the questions, use the cost data provided on pages 9 to 10. Congratulations on being hired as the new estimator for AIH Paving Company. Your boss, Mr. Nick Copernicus, has decided to assign you to a brand new project, the Route 84 bypass. The new project calls for the company to place a concrete pavement 26 feet wide by 10 inches thick for 5.78 miles, as part of a new bypass around the town of New Britain. All calculations will be based on a 45 minute hour (i.e., time factor). The work week for this project will be M-F 8 hours per day. The concrete plant can produce 375 cy/hr. The road needs to have one longitudinal construction joint and a transverse construction joint every 15 feet. The joints will be cut in two stages, the first 2 inches deep by 1/8 inch wide and the second 1 inch deep by 1/4 inch wide. 1. In order to prep the site, it will be necessary to clear existing vegetation. The plan calls for a clear space extending 12 feet from the end of the pavement on both sides. Average number of trees per acre is 425, with 105 being 1-2 feet in diameter and 65 being 2-3 feet in diameter. The remaining trees are 3-4 feet in diameter. Approximately 72% of the trees are hardwood. The 335 hp bulldozer and operator are the crew. Estimate the total time (in hours), cost per hour for the crew (bulldozer and operator), and total cost of clearing the site. Answer: (1) Total time: 2) Cost per hour for crew: (3) Total cost: dollars hr S/hr 2. The 375 cy/hr of concrete being produced by the plant uses the following per yard mix: Cement: 5.6 sacks (94#/sack) $104.00/ton Sand: 1,438 lb $ 9.00/ton Gravel: 1,699 lb $ 11.00/ton Water: 39 gal $ 0.42/1000gal Given that mix, and the costs above, what is the cost of the total project? Use 4% waste when calculating the total cost of the concrete for the project. The crew for the batch plant is a batch plant operator and a laborer. Answer: _dollars 3. The paver places concrete at 7.5 fpm (half the road width at a time). How long will it take to pave the entire road if the paver works 45 minutes per hour? If the paving crew costs $800/hr, what is the cost of the paving? Is the concrete plant large enough to meet the paver demand if the paver works 45 minutes per hour? Answer: (1) Total time: (2) Paving cost: dollars (3) Is the concrete plant large enough to meet the paver demand? 4. The concrete plant is located 12 miles from one end of the job site. The trucks carrying the concrete to the site can travel at 35 mph to the site and 45 mph on the return trip and can carry 20 tons of material per trip. How many cy of material is 20 tons? It takes 1.5 minutes to load each truck and 2.25 minutes to dump the concrete into the paver. How many trucks do you need to keep up with the operation? How much will the haul operation cost? Answer: (1) How many cy of material is 20 tons? (2) How many trucks do you need? (3) Haul operating cost: Answer: (1) Number of crews needed: (2) Cost of saw cutting joints: hr Answer: dollars 5. A saw cutting crew consists of a saw and operator, a water truck and driver, an air compressor and a laborer. Saw blades cost $750 each and can cut a 2 inch by 1/8 inch joint at 4 fpm or a 1 inch by 1/4 inch joint at 7 fpm. Blade life on 2 inch cuts is 12,500 If and on 1 inch cuts is 18,500 If. Use $400 per hour for the crew and equipment for the saw cutting operation. How many crews are required to complete the cutting in the minimum amount of time? What is the cost of saw cutting the joints? Answer: (1) Number of trucks needed: (2) Cost of transporting water: trucks crews dollars 6. Sealant will be installed in the joints - it is bought in 55 gallon drums. It costs $45 per gallon (150 If/gallon). A laborer can install 200 If in an hour. How much does the sealant cost installed? dollars 7. Water for plant will come from a pond; the water trucks can carry 2,500 gallons of water each. The driver will operate the pump at the pond. The truck will travel 25 mph loaded and 30 mph unloaded. The pond is located 5 miles from the plant. The water truck will take 10 minutes to fill and 10 minutes to empty. How many water trucks are required to ensure a continuous paving operation? What is the cost of transporting water? dollars trucks Cost Data MARR-i - for all equipment is 17% n-number of years to keep equipment is 5 years Hours that you expect to use the equipment is 1,350 hours per year Information on Labor All labor use: Workman's Comp - on base wage - use 14.62% Public Liability/property Damage - on base wage - use 6.5% Social Security - on total wage - 7.65% Federal Unemployment - and State Unemployment-on total wage - use 4.5% for the combined Unemployment Insurance Truck Drivers - water and concrete transit mix truck Base Rate - $27.98 Fringes - $17.22 Batch plant operator Base Rate - $31.41 Fringes - $20.50 Laborers - all categories Base Rate - $26.30 Fringes - $16.45 Operating Engineer - all categories Base Rate - $34.44 Fringes - $20.50 Information on Equipment Concrete Plant Cost - use $800 per hour - including all operating costs (except labor) Water Truck Hp - 200 Cost - $40,000 Salvage Value - $15,000 Oil tank capacity 15 quarts Oil changes every 150 hours Engine Factor - 0.5 Gas engine Pump at Pond - use $10/day Concrete Paver Cost-$250,000 HP-210 Oil tank capacity 207 gallons Oil changes every 300 hours Salvage Value - $175,000 Page 10 of 10 Engine Factor-.8 Diesel Engine Bulldozer Cost - 185,000 HP - 335 Oil tank capacity 9 gallons Oil changes every 150 hours Salvage Value - 25,000 Engine Factor - .65 Diesel Engine Concrete transit mix Truck for hauling concrete to site-use $65 per hour for the rental and operation of the truck (not including the driver) Note: Water weighs 8.34 pounds per gallon Gas- $3.50 per gallon Diesel - $4.25 per gallon Oil - $7.00 per gallon Please answer the questions using the case described below. To answer the questions, use the cost data provided on pages 9 to 10. Congratulations on being hired as the new estimator for AIH Paving Company. Your boss, Mr. Nick Copernicus, has decided to assign you to a brand new project, the Route 84 bypass. The new project calls for the company to place a concrete pavement 26 feet wide by 10 inches thick for 5.78 miles, as part of a new bypass around the town of New Britain. All calculations will be based on a 45 minute hour (i.e., time factor). The work week for this project will be M-F 8 hours per day. The concrete plant can produce 375 cy/hr. The road needs to have one longitudinal construction joint and a transverse construction joint every 15 feet. The joints will be cut in two stages, the first 2 inches deep by 1/8 inch wide and the second 1 inch deep by 1/4 inch wide. 1. In order to prep the site, it will be necessary to clear existing vegetation. The plan calls for a clear space extending 12 feet from the end of the pavement on both sides. Average number of trees per acre is 425, with 105 being 1-2 feet in diameter and 65 being 2-3 feet in diameter. The remaining trees are 3-4 feet in diameter. Approximately 72% of the trees are hardwood. The 335 hp bulldozer and operator are the crew. Estimate the total time (in hours), cost per hour for the crew (bulldozer and operator), and total cost of clearing the site. Answer: (1) Total time: 2) Cost per hour for crew: (3) Total cost: dollars hr S/hr 2. The 375 cy/hr of concrete being produced by the plant uses the following per yard mix: Cement: 5.6 sacks (94#/sack) $104.00/ton Sand: 1,438 lb $ 9.00/ton Gravel: 1,699 lb $ 11.00/ton Water: 39 gal $ 0.42/1000gal Given that mix, and the costs above, what is the cost of the total project? Use 4% waste when calculating the total cost of the concrete for the project. The crew for the batch plant is a batch plant operator and a laborer. Answer: _dollars 3. The paver places concrete at 7.5 fpm (half the road width at a time). How long will it take to pave the entire road if the paver works 45 minutes per hour? If the paving crew costs $800/hr, what is the cost of the paving? Is the concrete plant large enough to meet the paver demand if the paver works 45 minutes per hour? Answer: (1) Total time: (2) Paving cost: dollars (3) Is the concrete plant large enough to meet the paver demand? 4. The concrete plant is located 12 miles from one end of the job site. The trucks carrying the concrete to the site can travel at 35 mph to the site and 45 mph on the return trip and can carry 20 tons of material per trip. How many cy of material is 20 tons? It takes 1.5 minutes to load each truck and 2.25 minutes to dump the concrete into the paver. How many trucks do you need to keep up with the operation? How much will the haul operation cost? Answer: (1) How many cy of material is 20 tons? (2) How many trucks do you need? (3) Haul operating cost: Answer: (1) Number of crews needed: (2) Cost of saw cutting joints: hr Answer: dollars 5. A saw cutting crew consists of a saw and operator, a water truck and driver, an air compressor and a laborer. Saw blades cost $750 each and can cut a 2 inch by 1/8 inch joint at 4 fpm or a 1 inch by 1/4 inch joint at 7 fpm. Blade life on 2 inch cuts is 12,500 If and on 1 inch cuts is 18,500 If. Use $400 per hour for the crew and equipment for the saw cutting operation. How many crews are required to complete the cutting in the minimum amount of time? What is the cost of saw cutting the joints? Answer: (1) Number of trucks needed: (2) Cost of transporting water: trucks crews dollars 6. Sealant will be installed in the joints - it is bought in 55 gallon drums. It costs $45 per gallon (150 If/gallon). A laborer can install 200 If in an hour. How much does the sealant cost installed? dollars 7. Water for plant will come from a pond; the water trucks can carry 2,500 gallons of water each. The driver will operate the pump at the pond. The truck will travel 25 mph loaded and 30 mph unloaded. The pond is located 5 miles from the plant. The water truck will take 10 minutes to fill and 10 minutes to empty. How many water trucks are required to ensure a continuous paving operation? What is the cost of transporting water? dollars trucks Cost Data MARR-i - for all equipment is 17% n-number of years to keep equipment is 5 years Hours that you expect to use the equipment is 1,350 hours per year Information on Labor All labor use: Workman's Comp - on base wage - use 14.62% Public Liability/property Damage - on base wage - use 6.5% Social Security - on total wage - 7.65% Federal Unemployment - and State Unemployment-on total wage - use 4.5% for the combined Unemployment Insurance Truck Drivers - water and concrete transit mix truck Base Rate - $27.98 Fringes - $17.22 Batch plant operator Base Rate - $31.41 Fringes - $20.50 Laborers - all categories Base Rate - $26.30 Fringes - $16.45 Operating Engineer - all categories Base Rate - $34.44 Fringes - $20.50 Information on Equipment Concrete Plant Cost - use $800 per hour - including all operating costs (except labor) Water Truck Hp - 200 Cost - $40,000 Salvage Value - $15,000 Oil tank capacity 15 quarts Oil changes every 150 hours Engine Factor - 0.5 Gas engine Pump at Pond - use $10/day Concrete Paver Cost-$250,000 HP-210 Oil tank capacity 207 gallons Oil changes every 300 hours Salvage Value - $175,000 Page 10 of 10 Engine Factor-.8 Diesel Engine Bulldozer Cost - 185,000 HP - 335 Oil tank capacity 9 gallons Oil changes every 150 hours Salvage Value - 25,000 Engine Factor - .65 Diesel Engine Concrete transit mix Truck for hauling concrete to site-use $65 per hour for the rental and operation of the truck (not including the driver) Note: Water weighs 8.34 pounds per gallon Gas- $3.50 per gallon Diesel - $4.25 per gallon Oil - $7.00 per gallon