Why a Continuous RCC beam should be designed as a Tee beam for Span moments and as a Rectangular Beam for Support Moments?

Shrinkage is defined as the change in length or volume of a material resulting due to any chemical changes, moisture content and applied loads. In doubly reinforced structure longitudinal reinforcement provided for both tension and compression zone. Thus all the applied loads taken by the reinforcemRead more

**Shrinkage** is defined as the change in length or volume of a material resulting due to any chemical changes, moisture content and applied loads.

**In doubly reinforced structure** longitudinal reinforcement provided for both tension and compression zone. Thus all the applied loads taken by the reinforcement which are compression and tension value are much higher than concrete. Thus the reduction in length or volume is negligible. i.e no shrinkage occur.

In **Singly reinforced beam**, reinforcement provides longitudinally only in the tension zone. Thus all the compressive loads are taken by a concrete structure, Which is weak in compression as compared to steel reinforcement. Thus the reduction in volume takes place. i.e **shrinkage occur**.

*Hope you get the answer.*

## Madeh Izat Hamakareem

In the regions of a positive moment, a portion of the slab works with the beam (both under compression force), so that part should be included in the beam design. However, negative moments develop cracks at the upper part of the beam. So, the cracked part of the concrete section is neglected in theRead more

In the regions of a positive moment, a portion of the slab works with the beam (both under compression force), so that part should be included in the beam design. However, negative moments develop cracks at the upper part of the beam. So, the cracked part of the concrete section is neglected in the design, and the lower portion is in compression which is rectangular.

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