RCC Structures Design
If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge

Is decreased by Pe/Z
Is increased by PZ/e
Remains unchanged
Is increased by Pe/Z

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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
Plane sections transverse to the centre line of the beam before bending remain plane after bending
Compression is borne entirely by concrete

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