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RCC Structures Design

RCC Structures Design
The maximum diameter of a bar used in a ribbed slab, is

22 mm
20 mm
12 mm
6 mm

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RCC Structures Design
‘P’ is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The maximum stress ‘f’ in the beam, subjected to a maximum bending moment ‘M’, is

f = (P/A) + (M/Z)
f = (P/A) + (M/6Z)
f = (P/'+ (Z/M)
f = (A/P) + (M/Z)

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RCC Structures Design
For the design of a simply supported T-beam the ratio of the effective span to the overall depth of the beam is limited to

10
25
20
15

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RCC Structures Design
The zone in which transverse bending is likely to occur may be obtained by drawing a line from the faces of the column making an angle θ° with horizontal where θ° is

None of these
45°
60°
30°

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RCC Structures Design
If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width

R + T
T - R
R - T
√(R² + T²)

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RCC Structures Design
If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment

WL/6
WL/2
WL/4
WL/8

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