CBP Technical Measurements 2

Question 1

How many cubic yards of concrete are needed for a 30 ft x 40 ft slab that is 4 inches thick (no waste)?

Accepted Answer

14.8 cubic yards

Answer

30 x 40 x 0.333 ft = 400 cubic feet, and 400 / 27 = 14.8 cubic yards.

Question 2

How many board feet are in one 2x10 that is 16 feet long (nominal dimensions)?

Accepted Answer

26.67 board feet

Answer

Board feet = (2 x 10 x 16) / 12 = 26.67.

Question 3

In roofing estimates, one 'square' covers how much roof area?

Accepted Answer

100 square feet

Answer

A roofing square equals 100 square feet of roof surface.

Question 4

What does a roof pitch of 6/12 mean?

Accepted Answer

6 inches of rise for every 12 inches of horizontal run

Answer

Pitch is written as inches of rise per 12 inches of horizontal run.

Question 5

How many 4x8 drywall sheets are needed to cover one side of a wall 12 ft long and 8 ft high, with no openings or waste?

Accepted Answer

3

Answer

96 sq ft of wall / 32 sq ft per sheet = 3 sheets.

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