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Slip gates are a form of gate which permits people and vehicles through an entrance but which blocks the passage of animals. Branches or worked wood crossbars or stangs were used, one field slip gate pier with L-shaped grooves and the opposing stile gatepost with square or circular concavities to receive the three or four horizontal crossbars.
This is a list of building materials.. Many types of building materials are used in the construction industry to create buildings and structures.These categories of materials and products are used by architects and construction project managers to specify the materials and methods used for building projects.
Grade beam. A grade beam or grade beam footing is a component of a building's foundation. It consists of a reinforced concrete beam that transmits the load from a bearing wall into spaced foundations such as pile caps or caissons. [1]
The defects in concrete in Japan were found to be mainly due to high water-cement ratio to increase workability. Poor compaction occurred mostly because of the need for speedy construction in the 1960s and 1970s. Hajime Okamura envisioned the need for concrete which is highly workable and does not rely on the mechanical force for compaction.
Ridge – A post extending from the ground or foundation to the ridge beam. Samson – similar to a prick post or puncheon. Puncheon: 1) A short, stout post may be identical to a prick post; 2) Puncheon may also mean a split log or heavy slab of timber with the face smoothed, used for flooring or construction.
[citation needed] The formation level subsoil may still not be suitable for excavation or bearing capacity. The water in the caisson (due to a high water table) balances the upthrust forces of the soft soils underneath. If dewatered, the base may "pipe" or "boil", [clarification needed] causing the caisson to sink. To combat this problem, piles ...
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Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]
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