concrete slab

Also found in: Wikipedia.

concrete slab

[′käŋ‚krēt ′slab]
(civil engineering)
A flat, reinforced-concrete structural member, relatively sizable in length and width, but shallow in depth; used for floors, roofs, and bridge decks.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Concrete slab

A shallow, reinforced-concrete structural member that is very wide compared with depth. Spanning between beams, girders, or columns, slabs are used for floors, roofs, and bridge decks. If they are cast integrally with beams or girders, they may be considered the top flange of those members and act with them as a T beam. See Concrete, Concrete beam

A one-way slab is supported on four sides and has a much larger span in one direction than in the other may be assumed to be supported only along its long sides. It may be designed as a beam spanning in the short direction. For this purpose a 1-ft width can be chosen and the depth of slab and reinforcing determined for this unit. Some steel is also placed in the long direction to resist temperature stresses and distribute concentrated loads. The area of the steel generally is at least 0.20% of the concrete area.

A slab supported on four sides and with reinforcing steel perpendicular to all sides is called a two-way slab. Such slabs generally are designed by empirical methods. A two-way slab is divided into strips for design purposes.

When a slab is supported directly on columns, without beams and girders, it is called a flat plate or flat slab. Although thicker and more heavily reinforced than slabs in beam-and-girder construction, flat slabs are advantageous because they offer no obstruction to passage of light (as beam construction does); savings in story height and in the simpler formwork involved; less danger of collapse due to overload; and better fire protection with a sprink­ler system because the spray is not obstructed by beams. See Concrete column, Reinforced concrete

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.

concrete slab

A flat, rectangular, reinforced concrete structural member; especially used for floors, roofs, pads, etc.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
A MOTORIST has told of his lucky escape after a concrete slab was dropped onto his car from a bridge.
In March's magazine, "Extreme Heat: Tale of Two Cities" by Joseph Lstiburek, Ph.D., P.Eng., Figure 1 on Page 77 indicates use of a vapor barrier only under the concrete slab in the Las Vegas home.
This primer is specially formulated for superior penetration and adhesion to a green concrete slab.
Building IV, which is located within the 1.65 million s/f Central Crossings, is a 145,000 s/f spec building offering 48' x 50' column spacing, 36' clear height, ESFR sprinkler system, 7" concrete slab. 44 loading docks and 82 parking spaces.
This capillary action is typically battled in new construction by the use of a vapor barrier beneath the concrete slab, with 4-6 inches of gravel beneath the gravel.
In each experiment, the scientists placed 12 tons of soil on a large concrete slab tilted at 31 degrees.
The AASHTO Guide for Design of Pavement Structures (1993) uses standard axle load of 80.1 kN (18-kip) and presents a set of tables which define the equivalent axle load factors for rigid pavements in relation to actual axle load, axle configuration, concrete slab thickness and terminal value of [p.sub.t]--Present Serviceability Index.
It is difficult to understand the practice of placing a layer of sand over the top of a plastic ground cover under a concrete slab in California.
This tubing is usually embedded in a concrete slab on ground level or in a 1.5 thick concrete layer on top of a wood floor.
The concrete columns used at 505 Fifth Avenue are spaced 30-feet-on-center and they support an 11-inch-deep concrete slab with 22-inch-deep capitals at the columns.

Full browser ?