CFC Site Preparation & Layout Flashcards

What is the first step a fence contractor should take before digging post holes at any job site?

Answer: Call 811 to have underground utilities located

Calling 811 before digging is required by law in all 50 states; utility locators will mark underground lines to prevent dangerous and costly strikes.

When laying out a straight fence line across a level lot, which tool is most commonly used to establish a true, consistent line?

Answer: A mason's string line stretched between stakes

A taut mason's string line stretched between corner or end stakes provides a continuous visual reference to keep all line posts in perfect alignment.

For accurate fence post spacing, measurements should be taken:

Answer: On-center (center of one post to center of the next)

On-center measurement ensures consistent panel and rail lengths regardless of post width, which is the standard method used in fence layout.

On sloped terrain, which fence installation method allows the fence rails to follow the natural contour of the ground?

Answer: Raking (parallel/contour) method

The raking method angles the rails to run parallel with the slope, allowing the fence to follow the ground contour without gaps beneath the bottom rail.

When installing fence posts in expansive clay soils, what precaution helps prevent post heaving?

Answer: Over-excavate the hole and backfill with gravel or concrete

Over-excavating and replacing expansive clay with compacted gravel or concrete reduces moisture-driven soil expansion that can push posts upward.

The standard minimum post hole depth for a 6-foot privacy fence is generally:

Answer: 24–30 inches (approximately one-third of the post length)

Industry standard requires embedding approximately one-third of the post length below grade, placing a 9-foot post for a 6-foot fence about 2.5–3 feet deep.