Assumptions for Singly reinforced Sections | RCC Structures





Singly reinforced Sections | Design of RCC Structures

In our series of articles for singly reinforced sections, we have covered the following:

Now, we will move on with our discussion on “assumptions for singly reinforced sections”.

Stress-strain diagram

The equivalent stress-strain diagram is developed with respect to the mentioned assumptions in the post.

  1. The sections that are plane before bending remain plane after bending, at any cross-section.
  2. All tensile stresses are taken up by steel reinforcement and none by concrete.
  3. The stress to strain relationship of steel and concrete under working load is a straight line.
  4. The modular ratio m has the value 280/3σcbc
  5. There is a perfect adhesion between steel and concrete and no slip takes place between steel and concrete.

In our next article, we will discuss the design methods of Singly reinforced sections.



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  1. #1 by sachin on October 7, 2015 - 6:16 pm

    two types of loads are in beam one is live load and other is dead load(self load) along these all types of load is negligible ….
    self load is calculate by (vol×per unit load) and live load is actually given in questions….
    boath the loads are summed and total load are detemined

  2. #2 by sachin on October 7, 2015 - 6:10 pm

    compressive strength of concrete is taken as 0.67 times the compressive strength of concrete in cube….and don’t ask nonsence type questions

  3. #3 by jitender on January 24, 2015 - 9:29 am

    why 0.67 fck value is taken in concrete assumptions.

  4. #4 by MTANDA on July 22, 2013 - 10:45 am

    notify me of new posts by email

  5. #5 by mollel on July 6, 2013 - 6:10 am

    how can you be able to know the quantity of dead load or imposed load in designing of reinforced concrete beam

  6. #6 by Alex Akpaettor on May 3, 2012 - 2:42 pm

    This blog is very educative and beneficial.
    Keep up please.

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