Split-rail fence

They can be partially or wholly disassembled if the fence needs to be moved or the wood becomes more useful for other purposes.

For the enclosure of livestock such as cows and sheep, a four-foot (1.2 m) high fence using four rails is sufficient.

Buck-and-rail fencing was ubiquitous in battlefields in the Eastern Theater of the American Civil War, because of the proximity of forested land and their ease of construction.

These split rail fences were a major source of firewood for both the Union and Confederate armies.

[2] Buck-and-rail fences can keep larger animals in or out, while smaller wildlife can pass through them easily, and they can be readily climbed over by people.

In the United Kingdom (and increasingly in suburban America) a different style of split-rail fence is used.

This is not free-standing but consists of vertical posts placed in the ground, having holes (mortises) in each side into which the roughly pointed ends of split rails (usually of sweet chestnut) are placed.

Simple split-rail fence
Log fence with double posts (photo taken in 1938)
A buck-and-rail fence on a preserved Civil War battlefield in West Virginia
A mortised split-rail fence in suburban America, built in 1999