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Defensive barrier is also named sand cage, sand bag, welded gabion box, bastion barrier, etc. It is a prefabricated, multi-cellularsystem, made of zinc coated steel welded mesh and lined with non-woven geotextile. Units can be extended and joined using the provided joining pins. It is easily installed using minimal manpower and commonly available equipment. After extended, it is filled into sand, stone, then the barrier like a defence barrier wall or bunker, it is widely used for fortification and flood control.Unlike common welded gabion, Defensive Barriers can be filled with soil, sand or gravel. This means raw material are very easy to get, especially suitable for the coastal area where is abundant in sand. Usually, front end loader is employed to fill the container.
| Defensive barrier specification | |||
| Wire diameter | Mesh size | Panel size | Surface treatment |
| 3mm | 2''x2'' 3''x3'' 4''x4'' |
0.61x0.61m 1.06x1.37m 2.13x2.21m |
electro galvanized hot-dipped galvanized galfan coated |
| 4mm | |||
| 5mm | |||
| 6mm | |||
| Geotextile: In non-woven geotextile, color can be white, beige-sand color. | |||
| Unit | Height | Width | Length |
| Mil 10 | 7' (2.12m) | 7' (2.12m) | 95' (03.5m) |
| Mil 9 | 3' 3" (1.0m) | 2' 6" (0.76m) | 30' (9.14m) |
| Mil 8 | 4' 6" (1.37m) | 2' (1.22m) | 32' (10m) |
| Mil 7 | 7' 3" (2.21m) | 7' (2.13m) | 90' (27.74m) |
| Mil 6 | 5' 6" (1.68m) | 2' (0.61m) | 10' (3.05m) |
| Mil 5 | 2' (0.61m) | 2' (0.61m) | 10' (13.05m) |
| Mil 4 | 2' (0.61m) | 5' (1.5m) | 32' (10m) |
| Mil 3 | 3' 3" (1.0m) | 3' 3" (1.0m) | 32' (10m) |
| Mil 2 | 2' (0.61m) | 2' (0.61m) | 4' (1.21m) |
| Mil 1 | 4' 6" (1.37m) | 3' 6" (1.06m) | 32' (10m) |
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