Figure 8-29.--Low-wire fence.
Figure 8-30.--High-wire entanglement.
line (fig. 8-29). This results in omission of wire Nos. 6,
7, and 8, and in bringing all the apron and diagonal wires
much closer to the ground, so passage underneath this
fence is difficult. This fence may be used advan-
tageously on one or both sides of the double-apron
fence. The low-wire entanglement is used where
concealment is essential. In tall grass or shallow water,
this entanglement is almost invisible and is particularly
effective as a surprise obstacle. However, a man can pick
his way through this low-wire fence without much
difficulty; therefore, for best results, it must be used in
Figure 8-31.--Trestle apron fence.
Except for the omission of three wires and the
substitution of medium pickets, this fence is constructed
task normally requiring about 2 hours, assuming 38 men
in the same reamer as the double-apron fence.
per platoon. The two operations are laying out and
installing pickets and installing wire.
This obstacle consists of two parallel 4-strand
fences with a third 4-strand fence zigzagged between
For this operation, divide the working party into two
them to form triangular cells. With two rows of pickets,
groups: two thirds of the men going to the first group
as shown in figure 8-30, the entanglement is classed as
and one third to the second. The first group carries and
a belt; with one or more additional rows of fences and
lays out pickets, front row first and at 10-foot intervals.
triangular cells, it is a band. To add to the obstacle effect,
Second-row pickets are laid out in a line 10 feet to the
install front and rear aprons and place spirals of loose
rear of the front row and spaced midway between them.
wire in the triangular cells.
The first group also lays out an anchor picket in line with
each end of each 4-strand fence, 10 feet from the nearest
A 984-foot section of high-wire entanglement with
long picket. If guys are needed, anchor pickets are also
two rows of pickets, as shown in figure 8-30, is a platoon