Construction Math Fundamentals Flashcards

A wall is 12 feet 6 inches long. How many inches is that in total?

Answer: 150 inches

12 feet x 12 = 144 inches, plus 6 inches = 150 inches total.

How many square feet of drywall are needed to cover a wall that is 8 feet high and 14 feet long?

Answer: 112 sq ft

Area = length x height = 14 ft x 8 ft = 112 square feet.

What is the volume of a concrete footing that is 2 feet wide, 1 foot deep, and 40 feet long?

Answer: 80 cubic feet

Volume = 40 ft x 2 ft x 1 ft = 80 cubic feet.

If a roof has a 6:12 pitch, what is the rise for every 12 inches of horizontal run?

Answer: 6 inches

A 6:12 pitch means the roof rises 6 inches for every 12 inches of horizontal run.

Using the Pythagorean theorem, what is the rafter length if the run is 12 feet and the rise is 9 feet?

Answer: 15 feet

c^2 = 12^2 + 9^2 = 144 + 81 = 225. c = 15 feet.

What fraction represents 7/8 reduced to lowest terms?

Answer: 7/8

7/8 is already in lowest terms because 7 is prime and shares no common factors with 8 other than 1.