# What Is A Cantilever Beam | Application of Cantilever Beam | Advantages and Disadvantages of Cativer Beams

**What Is A Cantilever Beam**?

A **Cantilever Beam **is a rigid structural **member **in which one end is **fixed **and another end is **free** and it can be made up of **steel**, **concrete**, and composite **material**.

**Cantilever Beam**

The cantilever beam **transfers **the load to the **support **and it can **manage **the sheer force and **moment **of force. **Shear force **means stress applied **parallel **to the material and moment force is **characterized **as a force to** rotate or twist** an object. Also, **this beam **can be **constructed **with a **slab or truss.**

**Application of Cantilever Beam**

**The cantilever Beam is applicable in the following cases,**

- Construction of Building.

- Constructing a cantilever Bridge.

- For overhanging Roof projects such as a stadium Roofs, Shelters.

- For making furniture, shelving.

In building **construction**, there are the **different applications **of the **cantilever **beam such as a roof, **runway**, **gallery**, traveling crane, **above **part of the building there also used as **shelves**, large halls, **armories**, sun shed, exhibition **building**. **Large spans **mostly used **cantilever **construction.

**Advantages of Cantilever Beam**

- A **Cantilever Beam **is quite **easy **to **construct**.

- Only one side support is **required **and support on the **opposite **side is** not required because **it is a **free end.**

- It creates a **negative **bending moment that **assists **to counteract a positive **bending moment**.

- The span of a **Beam **can be more than that of a **simple beam **because a **beam **can be added to the **cantilever arms**.

- **It **is stiffer as **compared **to other types of the beam due to its **depth**.

- The span of beams can be **longer **than simple beams because **beams** can be added to the **cantilever supports**.

- This beam is easy for **maintaining **ground motion and **thermal expansion**.

**Disadvantages of Cantilever Beam**

- In **Cantilever beam **large **deflection **occurs.

- In a this beam, when a beam is **loaded **at one end, then a **high moment** generates at the **fixed end **and if more load is **applied**, then it can be **broken free **from **support**.

- The depth of the **cantilever **beam is high so that **required **more **material**.

- For **reducing **weight in **infrastructures **used truss **construction**.

**Cantilever Beam — Single load at the end**

**Cantilever Beam Single**

**Cantilever Beam Single load at an End**

**Maximum Reaction Force**

Maximum Reaction Force at the fixed end can be evaluated as,

**RA = F**

Where,

- RA = reaction force

- F = single-acting force**Maximum Moment**

Maximum Moment can be produced at the fixed end and it can be derived as a,

**M max = MA**

**= — FL**

Where,

- MA = maximum moment in A

- L = length of the beam (m, mm, in)**Cantilever Beam at intermediate load**

**Cantilever Beam Intermediate Load****Maximum Reaction Force**

Maximum Reaction force at the fixed end can be expressed as

**RA = F**

**Where,**

- RA = reaction force in A

- F = single-acting force in B**Maximum Moment**

The maximum moment at the fixed end can be expressed as,

**Mmax = MA**

**= -Fa**

**Where,**

- MA = maximum moment in A

- a = length between A and B**Cantilever Beam — Uniform Distributed Load**

**Cantilever Beam Uniformly Distributed Load****Maximum Reaction**

Maximum Reaction at the fixed end can be expressed as,

**RA = q L**

Where**,**

- RA = reaction force in A

- q = uniform distributed load

- L = length of a cantilever beam**Maximum Moment**

Maximum Moment at the fixed end can be expressed as

**MA = — q L2 / 2**

**FAQs:**

What are the **Application of Cantilever Beam**?**Construction of Building.****Constructing a cantilever Bridge.****For overhanging Roof projects such as a stadium Roofs, Shelters.****For making furniture, shelving.**What are the **Disadvantages of a Cantilever Beam**?In **This beam,** large deflection occurs.

In this, when a beam is loaded at one end, then a high moment generates at the fixed end and if more load is applied, then it can be broken free from support.

The depth of this beam is high so that **required **more **material**.

For **reducing **weight in **infrastructures **used truss **construction**.

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