Cost Estimation Flashcards

A fence contractor notices that material prices have risen 8% since the last similar project was completed. How should this information be used in the new estimate?

Answer: Apply the 8% increase to all material line items in the new estimate

Historical costs must be escalated by current price increases to reflect actual procurement costs; using outdated prices risks bidding below true cost.

Which of the following best describes a 'contingency allowance' in a fence project estimate?

Answer: A reserve added to cover unforeseen costs or scope uncertainties

A contingency allowance is a percentage added to the estimate to cover unexpected conditions, minor scope changes, or estimating errors discovered during construction.

For a fence project with multiple gate openings, which takeoff item is most often missed by inexperienced estimators?

Answer: Gate hardware such as hinges, latches, and drop rods

Gate hardware — hinges, latches, cane bolts, drop rods, and closers — is frequently overlooked because attention focuses on the gate frame and infill rather than the operational components.

A fence project requires 80 posts set 8 feet on center along a 640-foot run. Which formula correctly calculates the number of posts needed?

Answer: (640 ÷ 8) + 1 = 81 posts

For a straight run, the number of posts equals (total length ÷ spacing) + 1 because you need a post at each end; 640 ÷ 8 + 1 = 81 posts.

When estimating equipment costs for a fence project, which method correctly accounts for the cost of company-owned equipment?

Answer: Charge an internal rental rate based on depreciation, maintenance, and operating costs

Company-owned equipment should be charged at an internal rate that recovers depreciation, insurance, maintenance, and fuel costs, ensuring projects accurately absorb equipment expenses.

A bid requires the fence contractor to provide a performance bond. How does this typically affect the project estimate?

Answer: The bond premium cost is added as a direct project cost

Performance bond premiums (typically 1–3% of contract value) are a direct project cost that the contractor must include in the estimate to avoid eroding profit.

Which of the following site conditions would most significantly increase the excavation cost per post hole during fence installation?

Answer: Rocky or caliche soil requiring specialized drilling equipment

Rocky or caliche soil requires carbide-tipped auger bits, slower drilling speeds, or hand-breaking, substantially increasing equipment cost and labor time per hole.