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2. Hesco bastion - Wikipedia

   en.wikipedia.org/wiki/Hesco_bastion

   Assembling the HESCO unit entails unfolding it and filling it with sand, soil or gravel, usually using a front end loader.The placement of the barrier is generally very similar to the placement of a sandbag barrier or earth berm except that room must generally be allowed for the equipment used to fill the barrier.

3. Sandbag - Wikipedia

   en.wikipedia.org/wiki/Sandbag

   A sandbag or dirtbag is a bag or sack made of hessian (burlap), polypropylene or other sturdy materials that is filled with sand or soil and used for such purposes as flood control, military fortification in trenches and bunkers, shielding glass windows in war zones, ballast, counterweight, and in other applications requiring mobile ...

4. British hardened field defences of World War II - Wikipedia

   en.wikipedia.org/wiki/British_hardened_field...

   From March 1941, some pillbox embrasures were fitted with a Turnbull mount: this was a metal frame that supported a medium machine gun. [ 7 ] [ 8 ] The degree of protection offered by a pillbox varied considerably: the thickness of the walls and roof generally varied from just 12 in to 3 ft 6 in (0.3 to 1.1m) or more although the commercially ...

5. Norcon pillbox - Wikipedia

   en.wikipedia.org/wiki/Norcon_pillbox

   The standard model had a roof made of timber, corrugated iron, and earth. Some installations were fitted with a concrete roof, others had no roof at all. [2] The walls were given extra protection by a layer of sandbags. [3] [4] The exit may be via an open roof, through a hatch in the roof [5] or through a low entrance cut into the pipe to a ...

6. Revetment - Wikipedia

   en.wikipedia.org/wiki/Revetment

   Asphalt and sandbag revetment with a geotextile filter. A revetment in stream restoration, river engineering or coastal engineering is a facing of impact-resistant material (such as stone, concrete, sandbags, or wooden piles) applied to a bank or wall in order to absorb the energy of incoming water and protect it from erosion. River or coastal ...

7. Sangar (fortification) - Wikipedia

   en.wikipedia.org/wiki/Sangar_(fortification)

   Sangar from the Western Sahara conflict probably dating from the 1980s Illustration from the Manual of Military Engineering (1905). A sangar (or sanger) (Persian: سنگر) is a temporary fortified position with a breastwork originally constructed of stones, [1] and now built of sandbags, gabions or similar materials.