Civil Engineering - RCC Structures Design - Discussion


A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis

[A]. remains within the flange
[B]. remains below the slab
[C]. coincides the geometrical centre of the beam
[D]. none of these.

Answer: Option A


No answer description available for this question.

Nira said: (Jul 9, 2015)  
Explain it.

Nhoek Ren said: (Dec 4, 2015)  
Give me explanation with figure or picture.

Suman Das said: (Dec 8, 2016)  
Give the explanation.

Ahsaan said: (Apr 30, 2017)  
When the neutral axis remains in a flange, the lower part of N.A we do not consider in design so the upper part of N.A is like a rectangular.

Shah Fahad said: (May 23, 2017)  
When the neutral axis lies in the flange section, not in the web we have to design it as a simple rectangular beam as the compression block is limited in the flanges.

Sourav said: (Dec 23, 2017)  
When the neutral axis lies within the flange then we design the beam as a singly reinforced section.

Lalit said: (Oct 29, 2021)  
1) When NA lies in flange then;

The stress block dig above NA is a rectangular parabola. So stress distribution is linear
TF= 0.87fy.Ast.

(2) when NA falls in Web.
Stress in the flange is not uniform so analysis becomes difficult;
-Stress changes the constant value after the depth (3/7).

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