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In architecture, the capital (from Latin caput 'head') or chapiter forms the topmost member of a column (or a pilaster). It mediates between the column and the load thrusting down upon it, broadening the area of the column's supporting surface.
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.
1898 illustration of abacuses of many capitals in various styles. In architecture, an abacus (from the Ancient Greek ἄβαξ (ábax), ' slab '; or French abaque, tailloir; pl.: abacuses or abaci) [1] is a flat slab forming the uppermost member or division of the capital of a column, above the bell.
The shaft of the Doric order is channeled with 20 flutes. The capital consists of a necking or annulet, which is a simple ring. The echinus is convex, or circular cushion like stone, and the abacus is a square slab of stone. Above the capital is a square abacus connecting the capital to the entablature.
The Ionic anta capital, in contrast to the regular column capitals, is highly decorated and generally includes bands of alternating lotuses and flame palmettes, and bands of eggs and darts and beads and reels patterns, in order to maintain continuity with the decorative frieze lining the top of the walls. This difference with the column ...
A steel column is extended by welding or bolting splice plates on the flanges and webs or walls of the columns to provide a few inches or feet of load transfer from the upper to the lower column section. A timber column is usually extended by the use of a steel tube or wrapped-around sheet-metal plate bolted onto the two connecting timber sections.
The abacus upon the capital has concave sides to conform to the outscrolling corners of the capital, and it may have a rosette at the center of each side. Corinthian columns were erected on the top level of the Roman Colosseum, holding up the least weight, and also having the slenderest ratio of thickness to height. Their height to width ratio ...
Persian columns or Persepolitan columns are the distinctive form of column developed in the Achaemenid architecture of ancient Persia, probably beginning shortly before 500 BCE. They are mainly known from Persepolis , where the massive main columns have a base, fluted shaft, and a double-animal capital , most with bulls. [ 1 ]