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RCC Structures Design

RCC Structures Design
The number of treads in a flight is equal to

None of these
Risers in the flight
Risers minus one
Risers plus one

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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

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

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RCC Structures Design
If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by

(5/6) (r/1 + r²) M
(5/6) (r²/1 + r²) M
(5/6) (r²/1 + r⁴) M
(5/6) (r²/1 + r³) M

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RCC Structures Design
The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm², safe shear stress 5 kg/cm² and B.M. 24 mt,

Is safe in shear
Is unsafe in shear
Is over safe in shear
Needs redesigning

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RCC Structures Design
A part of the slab may be considered as the flange of the T-beam if

Flange has adequate reinforcement transverse to beam
It is built integrally with the beam
All of the listed here
It is effectively bonded together with the beam

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RCC Structures Design
If the average bending stress is 6 kg/cm² for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is

38 d
48 d
58 d
28 d

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