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Editor's Notes

1. A flat, horizontal (or nearly horizontal) molded layer of plain of reinforced concrete, usually of uniform but sometimes of variable thickness, positioned either on the ground or supported by beams, columns, walls, or other framework.
2. More specifically when slabs are supported on the two opposite sides beams only in which cases the structural action of the slab is one-way. Total load is carried in the direction perpendicular to supporting beams. And intermediate beam are provided on the slab, If then the ratio of the length and width of slab panel is at least equal to 2 the slab panel is then acting as an one-way slab.
3. The structural action of a one-way slab may be visualized in terms of the deformed shape of the loaded surface. Figure 2 shows a rectangular slab, simply supported along its two opposite long edges and free of any support along the two opposite short edges. If a uniformly distributed load is applied to the surface, the deflected shape will be as shown by the solid lines. Curvatures, and consequently bending moments, are the same in all strips s spanning in the short direction between supported edges, whereas there is no curvature, hence no bending moment, in the long strips I parallel to the supported edges. The surface approximately cylindrical
4. The structural action of a one-way slab may be visualized in terms of the deformed shape of the loaded surface. Figure 2 shows a rectangular slab, simply supported along its two opposite long edges and free of any support along the two opposite short edges. If a uniformly distributed load is applied to the surface, the deflected shape will be as shown by the solid lines. Curvatures, and consequently bending moments, are the same in all strips s spanning in the short direction between supported edges, whereas there is no curvature, hence no bending moment, in the long strips I parallel to the supported edges. The surface approximately cylindrical
5. Since concrete is weak in tension, these temperature and shrinkage stresses are likely to result in cracking. Cracks of this nature are not detrimental, provided their size is limited to what are known as Hairline cracks. it is necessary to provide special reinforcement for shrinkage and temperature contraction in the direction perpendicular to the main reinforcement. This added steel is known as temperature or shrinkage reinforcement, or distribution steel . Minimum Lateral Spacing is 5h or 8.