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**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**.

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 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**

**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**

**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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