Design of Slab thickness

The slabs are spanned across the walls or the beams, as the case may be. For a span of about three to four meters the slab thickness is usually of the order of 11cm to 12 cm. RCC slabs have become the most commonly used technique for roofs/ floors wherein, a slab thickness of 125mm to 150 mm is the norm. For most engineered structures, the slab thickness is determined as per the building design by  the structural engineer.In rural housing applications, which are mostly non-engineered, the skilled masons commonly cast slabs of 100mm/125mm thickness