Civil engineer guide to fighting positions, shelters, obstacles

AFH 10-222 Volume 14 1 August 2008 84
4.4.7. Concertina Wire Roadblocks. When laid in depth about 11 rows deep
across a roadway, strung concertina wire can be used as a roadblock (Figure
4.12). It is more effective when supported by pickets, and can also be used in
conjunction with steel hedgehogs. The materials needed to construct this obstacle
include 11 rolls of concertina wire, one roll of barbed wire, 30 long
pickets, and 22 short pickets. This material is enough to construct a concertina
wire obstacle approximately 33 feet in depth along the roadway. For engineers
experienced in laying concertina wire, this obstacle can be constructed
in approximately one hour. Table 4.2 contains installation procedures
for the concertina wire roadblock.
Figure 4.12. Concertina Wire Roadblock.