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RCC Structures Design

RCC Structures Design
For initial estimate for a beam design, the width is assumed

1/15th of span
1/30th of span
1/20th of span
1/25th of span

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RCC Structures Design
A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm² steel. If the modular ratio (m) is 15, the depth of the neutral axis, is

25 cm
35 cm
30 cm
20 cm

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RCC Structures Design
An under-reinforced section means

Steel will yield first
Steel is provided at the underside only
Steel provided is insufficient
Steel provided on one face only

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RCC Structures Design
The thickness of the topping of a ribbed slab, varies between

8 cm to 10 cm
12 cm to 15 cm
5 cm to 8 cm
3 cm to 5 cm

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RCC Structures Design
The system in which high tensile alloy steel bars (silica manganese steel) are used as pre-stressing tendons, is known as

Lee-McCall system
Freyssinet system
Magnel-Blaton system
C.L. standard system

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RCC Structures Design
If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than

WL/12 (L - D/3)²
WL/12 (L - 2D/3)²
WL/10 (L - 2D/3)²
WL/10 (L + 2D/3)²

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