A concrete slab of uniform thickness reinforced in one direction and cast integrally with parallel supporting beams

Suitable only for relatively short spans

A one-way slab supported by secondary beams, which in turn are supported by primary beams or girders

A reinforced concrete slab integrally with a series of closely spaced joists, which in turn are supported by a parallel set of beams

Designed as a series of parallel T-beams and are economical for medium spans with light to medium live loads

A concrete slab of uniform thickness reinforced in two directions and cast integrally with supporting edge beams or bearing walls on four sides

Economical for medium spans with intermediate to heavy loads

A reinforced concrete slab extending as a structural unit over three or more supports in a given direction

Subject to lower bending moments than a series of discrete, simply supported slabs

Reinforcement designed to absorb the stresses from applied loads and moments

Reinforcement placed perpendicular to the principal reinforcement in a one-way slab to absorb the stresses resulting from shrinkage or changes in temperature

A thin layer of high-quality concrete placed over a concrete base to form a floor surface

A thin layer of mortar spread on a moistened and prepared existing concrete surface prior to laying a new concrete slab

A rib formed perpendicular to the joists of a ribbed slab to distribute possible load concentrations over a larger area, one required for spans between 20 and 30 ft. (6 and 9 m), and two for spans over 30 ft.

A broad, shallow supporting beam for a ribbed slab that is economical to form since its depth is the same as that of the joists

A reusable metal or fiberglass mold used in forming a ribbed slab

A pan tapered to form thickened joist ends for greater shear resistance in a ribbed slab

A portion of a reinforced concrete slab bounded on all sides by the centerlines of columns, beams, or walls

A strip running in each direction of a two-way slab, within which moments per foot are assumed to be constant

A panel strip, one-half panel in width and symmetrical about the panel centerline

A panel strip occupying the adjacent quarter panels on both sides of a column centerline

The potentially high-shearing stress developed by the reactive force of a column on a reinforced concrete slab

The overstressed region of a reinforced concrete slab at a column support

The head of a column support for a flat slab enlarged to increase the plate area in shear

The portion of a flat slab thickened around a column or column capital to increase its resistance to shear

A panel of a flat slab having at least one edge that does not adjoin another panel

Any panel of a flat slab adjoining other panels along all four edges

A concrete slab of uniform thickness reinforced in two or more directions and supported directly by columns without beams or girders

Flat slab construction utilizing column capitals and drop panels

A square metal or fiberglass pan used in forming the ribs of a waffle slab

A flat plate thickened at its column supports to increase its shear strength and moment-resisting capacity

Suitable for short to medium spans with relatively light live loads

A two-way concrete slab reinforced by ribs in two directions

Able to carry heavier loads and span longer distances. Supporting beams and drop panels can be formed by omitting dome forms in selected areas.