Why is the depth of a Beam always greater than its width? | Why Beams have more Depth than Width?

In this video, I have discussed, Why is the depth of a Beam always greater than its width?
When a load is applied on a beam, it tends to deflect the beam & generates some bending moment within the beam. The primary role of a beam is to withstand the moment generated by the load applied to it. As the beam opposes deflection, it generates a substantial moment, which it must endure.
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Beams are designed to resist the bending stresses with greater flexural rigidity. Flexural rigidity is nothing but the resistance offered by a beam while undergoing bending.
Hence, the most cost-effective beam design is one that provides the greatest flexural rigidity with the smallest sectional area. The rigidity of a beam is represented by EI, where E is the flexural modulus or modulus of elasticity in bending, and I is the moment of inertia of the given cross-section.
In other words, the ability of a beam is determined by its moment of inertia, which indicates the resistance created within the beam. The larger the moment of inertia, the greater will be the resistance offered by the beam to the moment.
For a specific material, E remains constant, and the moment of inertia (I) is determined by the beam's sectional dimension.
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[@neelankusekhar9949]

Simple and effective lecture.

[@anandjamdade9156]

Nice information Sir

[@navjotsingh7360]

I am a physics major. I wanted to learn civil engineering for the construction of my own house . That would give me knowledge and experience building a house and also save some money on engineer hiring. This channel is gold mine for me.

[@basavarajakannadiga6201]

Thank you so much my dear sir

[@thinker3852]

Excellent sir.... I am very happy after watching ur video...

[@CivilTutor]

Glad to hear that

[@ravindrahampiholi4676]

Very nice illustration

[@CivilTutor]

Many many thanks🙏

[@erabhi5]

Always Enjoy your lectures sir, but u didn't fullfill one of my wish, Ssb with all cases of Uvl

[@anandgor4181]

Very nice

[@CivilTutor]

Thanks

[@thinker3852]

I am building my house and my engineer and contractors are unable to give specific reason for this beam depth and height....

[@abhinavrawat1973]

Sir are you from Kashmir

[@ibrahimkhan8098]

Moment of inertia

[@user-kx3or6ju8t]

What about a strip beams?

[@CivilTutor]

The width of strip beams is generally greater than the depth because their primary function is to distribute the load of the building over a wider area of soil. Strip foundations are typically shallow and wide, so the strip beams are designed to match the width of the foundation. By increasing the width of the strip beam, it is possible to reduce the load on the soil and prevent excessive settlement. In contrast, normal reinforced concrete (RCC) beams used to carry wall loads are designed to resist bending and shear stresses caused by the weight of the walls and other loads. These beams are usually deeper than their width because the depth of the beam is what provides the necessary strength to resist bending stresses. The width of the beam is usually kept to a minimum to reduce material costs and simplify construction. So, the difference in the width and depth of strip beams and normal RCC beams is due to their different design requirements and functions. While strip beams are designed to distribute loads over a wider area of soil, normal RCC beams are designed to resist bending and shear stresses caused by the weight of the walls and other loads.

[@brigadeshivu]

When we need stability the case will be reverse

[@eduardodaquiljr9637]

Engineering mechanics yan

[@CivilTutor]

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