Civil engineer guide to fighting positions, shelters, obstacles

AFH 10-222 Volume 14 1 August 2008 6
Figure 4.10. Earth-Filled Obstacles. ............................................................ 82
Figure 4.11. Urban Rubble. ......................................................................... 83
Figure 4.12. Concertina Wire Roadblock. ................................................... 84
Table 4.2. Installation Procedures – Concertina Wire Roadblock. .............. 85
Table 4.3. Installation Procedures – Triple-Strand Concertina Wire Fence. 86
Figure 4.13. Picket Spacing. ........................................................................ 87
Figure 4.14. Joining Rolls of Concertina Wire. ........................................... 87
4.5. Prefabricated Obstacles. ......................................................... 88
Figure 4.15. Fence Reinforced With Cable. ............... ................................. 88
Figure 4.16. Obscuration Screen on Perimeter Fence. ........... ..................... 89
Figure 4.17. Predetonation Screening. ........... ............................................. 90
Figure 4.18. Concrete Barriers. ........... ........................................................ 91
Figure 4.19. Portable Lift Barrier. ............................................................... 93
Figure 4.20. Retractable Bollards. ............................................................... 93
Figure 4.21. Jersey Barrier. ......... ................................................................ 94
Figure 4.22. Fixed Bollards. ........................................................................ 95
Figure 4.23. Removable Posts. .................................................................... 96
Figure 4.24. Typical Concrete Cube and Cylinder. ..................................... 97
Figure 4.25. Tetrahedrons and Dragon’s Teeth. .......................................... 97
Figure 4.26. Steel Hedgehog. .... .................................................................. 98
Chapter 5—REVETMENTS. ................................................................... 99
5.1. Overview. ............................................................................... 99
Figure 5.1. Various Types of Revetments. ........ .......................................... 99