CFC Fence Design & Installation 2

Question 1

A common rule of thumb for wood fence post embedment depth in stable soil is:

Accepted Answer

One-third to one-half of the above-ground post height

Answer

Burying one-third to one-half of the exposed height gives adequate resistance to overturning, subject to local frost depth.

Question 2

What is the typical recommended diameter for a concrete-set post hole?

Accepted Answer

About three times the width of the post

Answer

A hole roughly three times the post width provides enough concrete around the post for lateral strength.

Question 3

Why do installers place several inches of gravel at the bottom of a wood post hole?

Accepted Answer

To promote drainage and reduce rot at the post end

Answer

Gravel lets water drain away from the end grain, slowing decay.

Question 4

When finishing the top of a concrete post footing, the concrete should be:

Accepted Answer

Crowned or sloped away from the post to shed water

Answer

A sloped crown sheds water away from the post, preventing pooling and rot.

Question 5

On a chain link fence, how is the fabric typically attached to terminal (end, corner, gate) posts?

Accepted Answer

With a tension bar held by tension bands

Answer

A tension bar woven through the fabric is clamped to terminal posts with tension bands.

CFC - Certified Fence Contractor Practice Test