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During World War I and World War II, many types of blockhouses were built, when time allowed usually constructed of reinforced concrete. The major difference between a modern blockhouse and a bunker is that a bunker is constructed mostly below ground level while a blockhouse is constructed mostly above ground level. [14]
Hochbunker usually consisted of large concrete blocks above ground with walls between 1 and 1.5 metres (3 ft 3 in and 4 ft 11 in) thick and with huge lintels above doorways and openings. They often had a constant interior temperature of 7 to 10 °C (45 to 50 °F), which made them perfectly suitable for laboratories, both during and after the war.
During World War I, Sir Ernest William Moir produced a design for concrete machine-gun pillboxes [5] constructed from a system of interlocking precast concrete blocks, with a steel roof. Around 1,500 Moir pillboxes were eventually produced (with blocks cast at Richborough in Kent) and sent to the Western Front in 1918.
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Authorities are working to determine whether human remains found in a concrete “bunker” underneath a man’s California mobile home belonged to a missing couple who lived next door at a nudist ...
Download QR code; Print/export ... was built during the Cold War to withstand a near direct hit from a 20 ... Each bunker is 80 feet × 26.5 feet (24.4 meters × 8 ...
Blast doors in a missile control bunker at Minot Air Force Base, North Dakota. The 25-ton blast door in the Cheyenne Mountain nuclear bunker is the main entrance to another blast door (background) beyond which the side tunnel branches into access tunnels to the main chambers.
The 930 m 2 (10,000 sq ft) shelter is composed of 42 school buses, which were buried underground as patterns for concrete that was then poured over to provide the main structure, onto which up to 5 meters (14 feet) of earth were piled to provide fallout protection.