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A reinforced concrete column is a structural member designed to carry compressive loads, composed of concrete with an embedded steel frame to provide reinforcement. For design purposes, the columns are separated into two categories: short columns and slender columns.
A Lally column is a round or square thin-walled structural steel column filled with concrete, [1] and oriented vertically to provide support to beams or timbers stretching over long spans. Lally columns are an engineered component and as such must be installed exactly as the design engineer specified.
Area or basement area In Georgian architecture, the small paved yard giving entry, via "area steps", to the basement floor at the front of a terraced house. Arris A sharp edge created when two surfaces converge; this includes the raised edge between two flutes on a column or pilaster, if that edge is sharp. Arris Rail
String course (Belt course or Band course): A decorative horizontal row of masonry, narrower than the other courses, that extends across the façade of a structure or wraps around decorative elements like columns. [1] [2] [4] Sill course: Stone masonry courses at the windowsill, projected out from the wall. [1]
In the illustration of the column formwork above, the 'column clamps' are closer together at the bottom. Note that the column is braced with steel adjustable 'formwork props' and uses 20 mm 'through bolts' to further support the long side of the column. Some models of "permanent formwork" also can serve as extra reinforcement of the structure.
Inside the structure, a single Lally column, steel basement jack, wooden column or support post may hold up the floor above in a small basement. A series of these supports may be necessary for large basements; many basements have the support columns exposed.