2WR²/16
WR²/16
3WR²/16
5WR²/16

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

## RCC Structures Design Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by

Grashoff formula
Rankine Grashoff formula
Marcus formula
Rankine formula

## RCC Structures Design A pre-stressed concrete member

Is stressed after casting
Possesses internal stresses

## RCC Structures Design If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be.

Parabolic with convexity upward
Straight above centroidal axis
Straight below centroidal axis
Parabolic with convexity downward

## RCC Structures Design In a doubly-reinforced beam if ‘c’ and ‘t’ are stresses in concrete and tension reinforcement, ‘d’ is the effective depth and ‘n’ is depth of critical neutral axis, the following relationship holds good

(t + c)/n = (d + n)/n
mc/t = n/(d - n)
(m + c)/t = n/(d + n)
mc/t = (d - n)/t