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A parapet fortification (known as a breastwork when temporary) is a wall of stone, wood or earth on the outer edge of a defensive wall or trench, which shelters the defenders. [7] [8] In medieval castles, they were often crenellated. In later artillery forts, parapets tend to be higher and thicker.
Jersey barriers on the road. A Jersey barrier, Jersey wall, or Jersey bump is a modular concrete or plastic barrier employed to separate lanes of traffic.It is designed to minimize vehicle damage in cases of incidental contact while still preventing vehicle crossovers resulting in a likely head-on collision.
Polish barricade during the 1944 Warsaw Uprising Latvian barricade during The Barricades in 1991 Barricades in Kyiv during the Revolution of Dignity Street Fighting on Rue Soufflot, Paris, June 25, 1848 [1] Hydraulic barricade, in 2011, defends Wall Street, in New York City
Pressurized walls are a type of wall that is installed without the use of nails or screws. The term is frequently used interchangeably with "temporary walls", "flex walls" and "partition walls" to refer to walls that can be installed and removed without modifying or damaging the existing property.
These signs are often temporary in nature and used to indicate road work (construction), poor roads, or temporary conditions ahead on the road including flagmen, uneven pavement, etc. (Note that some "high water" signs are posted to alert drivers of a flood-prone area and do not actually mean that there is a flooded section of road ahead.)
A typical temporary wall can be constructed with 1⁄2" (6 mm) to 5⁄8" (16 mm) sheet rock (plasterboard), metal 2 × 3s (approx. 5 × 7 cm), or 2 × 4s, or taped, plastered and compounded. Most installation companies use lattice (strips of wood) to cover the joints of the temporary wall with the ceiling.
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