RCC Structures Design
If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than

WL/10 (L + 2D/3)²
WL/10 (L - 2D/3)²
WL/12 (L - D/3)²
WL/12 (L - 2D/3)²

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RCC Structures Design
In a singly reinforced beam

Steel possesses initial stresses when embedded in concrete
Elastic moduli for concrete and steel have different values within the limits of deformation of the beam
Compression is borne entirely by concrete
Plane sections transverse to the centre line of the beam before bending remain plane after bending

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RCC Structures Design
Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than

42 diameters from the centre of the column
42 diameters from the inner edge of the column
24 diameters from the centre of the column
42 diameters from the outer edge of the column

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