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RCC Structures Design

RCC Structures Design
If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, is

45
40
55
50

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RCC Structures Design
If W is the load on a circular slab of radius R, the maximum circumferential moment at the centre of the slab, is

WR²/16
Zero
3WR²/16
2WR²/16

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RCC Structures Design
If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and σc are the modular ratio and maximum stress in the configuration of concrete, the strength of column is

σc(A - Asc) + m σcAsc
σcAc + m σcAsc
All listed here
σc[A + (m - 1)Asc]

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RCC Structures Design
In a combined footing if shear stress exceeds 5 kg/cm², the nominal stirrups provided are:

10 legged
12 legged
8 legged
6 legged

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RCC Structures Design
A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is

WL/3P
WL/2P
WL/4P
WL/P

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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

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

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