# Estimating Flashcards

1 – A contractor bids a project based on the below figures: A Building Contractors cost on this job.$ 1,000 in equipment$ 3,000 in labor$ 6,000 in materialsOwner has offered contractor $ 12,000 to do job. What would be the outcome if contractor takes the $ 12,000 offer? 1 – Project overhead is 20% of direct labor = $ 600.002 – Overhead is 10% of direct labor cost and materials = $ 900.003 – Profit is 10% on all of the costs = $ 1,150.00Total cost for this project is $ 12,650.00

A profit of only $ 500.00

2 – How many sheets of 4’ x 8’ plywood would it take to form a freestanding concrete wall 8 feet high by 24 feet long 12 inches thick?

Answer: 13 ** Remember when forming a concrete wall out of plywood that you have to form the ends also. So each end would take a piece of plywood 1 foot by 8 feet high. Each side would require 6 4’ x 8’ pieces and the end would take 2 1 foot by 8 pieces. The answer is 12 -1/2 pieces so the best answer is 13. It may help to draw a picture.

– There is an excavated hole that is 11 feet deep with a flat area on the bottom that is 3 feet wide with Type C soil. What is the width at the top of this excavation?

Answer: 36 feet Note: It may help to draw a picture and look up info in Excavations in the OSHA Book

– What is the formula for calculating concrete?

Answer: Divide cubic feet by 27

5 – An owner wants the contractor to add a change order for $ 2500 for materials and $ 700 for labor. There is a deduction from the contract of $ 1000 for materials and 280 for labor. The contractor will add 10% to his change order and will also give back the 10% on the deductions. What will be the net change order to add to the contract?

Answer: $2,112.00 to be billed

6 – You are excavating an area 245 feet by 350 feet; the equipment can remove 100 cubic yards per hour. If you need 6 inches of grade cut off the whole area, how many hours would it take?

Answer: 15.88 hours probably 16 hours Formula: 245 x 350 x .50 divided by 27 divided by 100 = 15.88 hours

7 – Parking lot is 140 feet wide and slopes 1/8th inch per foot. The highest elevation is 80 feet. What is the lowest elevation?

Answer: 78.54 feetFormula: 140 divided by 8 = 17. 5 inches 80.00 – 1.46 = 78.54

8 – If you have a rise of 88 feet in one mile, what would the rise be?

Answer: 1.7 %Formula: 88 feet divided by 5,280 = 1.67 %

9 – You are building a 48’ x 28’ single story house with a 8:12 straight gable roof and the sides are 96” from sole plate to top plate. How many 4’ x 8’ sheets of wall sheathing are required? Do not deduct for door or window openings or for any waste.

Answer: 47 piecesFormula: 48 feet plus 28 feet x 2 x 8 feet = 1,216 square feet of sides14 feet x .67 = 9.38 x 14 feet divided by 2 x 2 = 131.32 x 2 (both ends) = 262.64 square + 1,216 square feet divided by 32 = 46.20 pieces

10 – There is a 24’ long, 2” x 4” construction fir wall that has a double top plate, a single bottom plate with (19) 8’ studs. Fir costs $750 per thousand board feet. How much will it cost for the lumber on this wall? Do not allow for waste.

Answer: $112.00 –Formula: 2 x 4 x 224 divided by 12 = 149.33 board feet x $.75 = $ 112.00

– What is the percent ofgrade if vertical is 83 feet and horizontal is 277 feet?

Answer: 29.96 % Formula: 83 divided by 277 = 29.96 %

12 – What would be the total cost of workman’s compensation insurance for a company if the main office salary was at $ 125,000 at $ 1.20 per hundred and the field salaries were $ 250,000 at $ 8.50 per hundred?

Answer: $ 22,750.00Formula: $ 125,000 divided by 100 = 1,250 x $ 1.20 = $ 1,500.00 $ 250,000 divided by 100 = 2,500 x $ 8.50 = $ 21,250.00 $ 22,750.00

13 – What would be the total cost of workman’s compensation insurance for a company if the main office salary was at $ 125,000 at $ .10 per hundred and the field salaries were $ 250,000 at $ .20 per hundred?

Answer: $ 625.00Formula: $ 125,000 divided by 100 = 1,250 x $.10 = $ 125.00 $ 250,000 divided by 100 = 2,500 x $.20 = $ 500.00 $ 625.00

14 – A company has current assets of $ 250,000 and current liabilities of $ 180,000. Their fixed assets are $ 1,500,000 and long term debt is $ 750,000. Their bonding capacity is 10 times their working capital, what is their bonding capacity?

Answer: $ 700,000.00Formula: Working capital = Current assets $ 250,000 minus current liabilities $180,000= working capital which is $ 70,000. Bonding is 10 times working capital = $ 70,000 Note: Fixed assets and long term debt mean nothing $ 70,000 x 10 = $ 700,000

15 – A contractor uses the accrual method of accounting. He has $ 6,000 billing for May, a $ 10,000 billing for June. He receives $ 6,000 in June payments and he pays his total bills of $ 1,000 in May and total bills of $ 5,000 in June. What is his profit for June?

Answer: $5,000.00Formula: $ 10,000 billing for June less $ 5,000 bills in June = $ 5,000 profit The month of May has no bearing on answer, only June accounting.

16 – A concrete footing needs to have a load supported on it of 252 kips, with a soil bearing capacity of 6,000 pounds per square foot. How many square feet will this footing have to be?

Answer: 42 square feetFormula: 252 kips or 252,000 pounds divided by 6,000 pounds = 42 square feet

17 – If you have a pier or pier footing that is 7’0” x 7’0” by 1’6” deep using 4,000 psi concrete. The soil that is footing is sitting on has a bearing capacity of 2,000 pounds per square foot. What is the maximum load that soil can bear with this footing in kips?

Answer: 98 kips or 98,000 poundsFormula: The area of 7 feet x 7 feet x 2,000 pounds per square foot = 98,000 pounds The depth of the footing and 4,000 psi concrete has no bearing on answer 98,000 pounds or 98 kips

18 – A question that said if you have 2 workers working 40 hours in 5 days (which is 8 hours per day)how many____ workers would do the same job in 2 days.The answers given were 2, 3, 4, 5,

Answer: 5 workers in 2 daysFormula: Figure the man hours worked first. 2 workers x 40 hours = 80 man hours 80 man hours divided by 16 (2 – 8 hour days) = 5 workers in 2 days

19 – A question dealing with paint coverage. They will give you how much area a gallon of paint will cover for the first coat and the second coat and the cost per gallon. They then want you to figure the area of a wall on the drawings and figure what the cost will be to paint both sides of a wall. I don’t know either of these figures so I am making this one up. 1 – Gallon of paint is $ 20.00 2 – A gallon of paint will cover 400 square feet 3 – The wall measures 40 feet long and 10 feet high Each side of the wall is 400 square feet and both sides receive paint

400 x 2 = 800 square feet divided by 400 square feet = 2 x $ 20.00 per gallon = $ 40.00

20 – A road is 26’ 6” wide. From the center of the road, the slope drops 2% to the edge. What is the elevation drop at the edge of the road?

Answer: The actual answer is 3 - 3/16 inch. Probably the answer they are looking for is a 4 inch drop.Formula: Half of the road width to get to center which is 13’3” 13.25 x .02 = .265. This in inches is 3-3/16 inches