CLC Material Takeoff & Ordering 2 — Questions and Answers
Question 1: When calculating the number of 4x8 sheets of plywood needed for a 480 sq ft subfloor, how many sheets are required with no waste factor?
- 12 sheets
- 15 sheets (Correct answer)
- 18 sheets
- 20 sheets
Correct answer: 15 sheets
Each 4x8 sheet covers 32 sq ft; 480 ÷ 32 = 15 sheets.
Question 2: A lead carpenter is ordering crown molding for a room with perimeter of 56 LF. The room has one 8-ft doorway with no molding. With a 10% waste factor, how many linear feet should be ordered?
- 48 LF
- 52.8 LF (Correct answer)
- 53 LF
- 58 LF
Correct answer: 52.8 LF
(56 - 8) × 1.10 = 48 × 1.10 = 52.8 LF.
Question 3: Which document is the primary source used to perform an accurate material takeoff?
- Material safety data sheet
- Architect's construction drawings and specifications (Correct answer)
- Supplier price quote
- Project schedule
Correct answer: Architect's construction drawings and specifications
Construction drawings and specifications provide dimensions and material requirements needed for takeoff.
Question 4: When ordering dimensional lumber, what does 'board foot' measure?
- Linear length of a board
- Volume equal to 1 inch × 12 inches × 12 inches (Correct answer)
- Weight per linear foot
- Surface area in square feet
Correct answer: Volume equal to 1 inch × 12 inches × 12 inches
A board foot equals 1 inch thick × 12 inches wide × 12 inches long (144 cubic inches).
Question 5: A carpenter needs 2x10 joists at 16" OC spanning 14 feet across a 20-foot-wide deck. How many joists are needed (including both end joists)?
- 14
- 15
- 16 (Correct answer)
- 17
Correct answer: 16
20 ft ÷ 1.333 ft (16" OC) = 15 spaces + 1 = 16 joists including both ends.
Question 6: What is the purpose of adding a waste factor to a material takeoff?
- To inflate the project budget for profit
- To account for cuts, defects, and installation losses (Correct answer)
- To ensure materials are ordered in bulk for discount pricing
- To compensate for supplier delivery errors
Correct answer: To account for cuts, defects, and installation losses
Waste factors cover material lost to cuts, damaged pieces, and installation inefficiencies.
Question 7: When performing a takeoff for roof shingles, which unit of measurement is typically used to order materials?
- Square feet
- Linear feet
- Squares (100 sq ft) (Correct answer)
- Bundles per bundle
Correct answer: Squares (100 sq ft)
Roofing materials are ordered by the 'square,' which equals 100 square feet of coverage.
CLC Material Takeoff & Ordering 2
When calculating the number of 4x8 sheets of plywood needed for a 480 sq ft subfloor, how many sheets are required with no waste factor?