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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.
A concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete. Steel- reinforced slabs, typically between 100 and 500 mm thick, are most often used to construct floors and ceilings, while thinner mud slabs may be used for exterior paving ( see below ).
An architectural term applied to a colonnade, in which the intercolumniation is alternately wide and narrow. Arcade A passage or walkway covered over by a succession of arches or vaults supported by columns. Blind arcade or arcading: the same applied to the wall surface. Arch
Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks. This method of construction allows for a large portion of the work to be completed at ground level, negating the ...
Flat slab subduction is characterized by a low subduction angle (<30 degrees to horizontal) beyond the seismogenic layer and a resumption of normal subduction far from the trench. [1] A slab refers to the subducting lower plate. A broader definition of flat slab subduction includes any shallowly dipping lower plate, as in western Mexico.
A waffle slab is flat on top, while joists create a grid like surface on the bottom. The grid is formed by the removal of molds after the concrete sets. This structure was designed to be more solid when used on longer spans and with heavier loads. [3]
The slabs to wash the clothes were slabs of natural stone chosen to present a fine and relatively flat surface. The small rounded irregularities could help of friction in the washing process. [10] [11] In some cases "artificial slabs" were made especially, in which the friction surface was wood, although the apparatus was still called "washing ...
Slab pull force, the tectonic plate force due to subduction; Slab suction, one of the major plate tectonic driving forces; Slab window, a gap that forms in a subducted oceanic plate; Slab (fossil) and counter slab, the two counterparts of a fossil impression; Slab hut, a kind of dwelling made from slabs of split or sawn timber; Slab of beer, a ...