Hollow Rectangular Beam Deflection Calculator

Hollow Rectangular Beam Deflection Calculator is a tool used to calculate the elastic deflection of a given hollow rectangular beam.

Hollow Rectangular Beam Deflection Calculator is a tool used to calculate the elastic deflection of a given hollow rectangular beam. This calculator helps you estimate the maximum deflection of the beam based on inputs such as material properties, loads and beam dimensions. This way, engineers and designers can get accurate results in their structural analysis and beam design.

When using the online Hollow Rectangular Beam Deflection Calculator, you can calculate by entering: length, width, height, wall thickness, force / weight of the beam and material type.



Wall Thickness
Force / Weight of the Beam
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    How to Calculate the Deflection of a Hollow Rectangular Beam?

    The following steps are usually followed when calculating the deflection of a hollow rectangular beam:

    1. Determine the Geometric Properties of the Beam: First, the dimensions of the hollow rectangular beam are determined. These dimensions usually include properties such as height, width and wall thickness.
    2. Determining the Material Properties: The material properties of the beam usually include information such as elastic modulus, moment of inertia and cross-sectional area. These properties are necessary to describe the behavior of the material of the beam.
    3. Determination of Loads and Support Conditions: The loads acting on the beam and the support conditions must be determined. These include information such as the type of supports under the beam and the magnitude and placement of the applied loads.
    4. Calculation of Reaction Forces of the Beam: Based on the determined loads and support conditions, the reaction forces of the beam are calculated. These forces are the forces at the support points of the beam.
    5. Deflection Calculation: Using the obtained reaction forces and material properties, the elastic deflection of the hollow rectangular beam is calculated. This is usually accomplished by solving appropriate differential equations or using numerical methods.
    6. Evaluation of Results: The deflection values obtained are usually evaluated by comparing them with the design requirements. This step is important to ensure the reliability of the design of the beam.

    These are the basic steps that are generally followed to calculate the deflection of a hollow rectangular beam. However, the calculation process can often be more complex and vary according to specific cases. For this reason, specialized calculation software or calculators are often used in engineering applications.

    What is a Hollow Rectangular Beam?

    A hollow rectangular beam is a structural element that is hollow on the inside of all four sides and usually has a rectangular cross-section. Such beams are often used in load-bearing systems and can be found in many different engineering applications.

    Hollow rectangular beams can offer many advantages. For example, they can save weight because their hollow interior reduces the weight of the beam while at the same time allowing it to maintain sufficient strength. Also, the hollow structure can increase the moment of inertia of the beam, which can increase the bending strength of the beam.

    Such beams are often used in structural engineering, bridges, building systems, vehicle chassis structures and many industrial applications. Hollow rectangular beams can be made from a variety of materials according to design requirements and specific application areas, which can include steel, aluminum, concrete and composite materials.

    What is Beam Deflection?

    Beam deflection is the deformation of a beam under loads acting on it. It usually occurs when one end of the beam is fixed while loads act on the other end. This deformation can be in the form of the beam moving away from its original position or bending.

    Beam deflection varies depending on factors such as material properties of the beam, dimensions, loads acting on it and support conditions. Beam deflection is an important parameter to be considered by engineers in structural analysis and design. Because excessive deflection can threaten structural integrity and exceed the bearing capacity.

    Beam deflection is generally divided into two types: elastic and plastic deflection. Elastic deflection is the deformation of the beam within elastic limits and the beam is expected to return to its original position when the load on the beam is removed. Plastic deflection is when the beam exceeds its elastic limits and undergoes permanent deformation.

    Beam deflection calculations play an important role in structural engineering and are essential for the safe design and use of beams.

    Factors Affecting Beam Deflection

    There are many factors that influence beam deflection. These include the following:

    • Magnitude and Placement of Loads: The magnitude, shape and placement of the loads acting on the beam affect its deflection. Larger or evenly distributed loads generally cause more deflection.
    • Geometry of the Beam: The dimensions, cross-sectional shape and thickness of the beam affect deflection. Generally, longer and thinner beams show more deflection.
    • Material Properties: The properties of the material from which the beam is made, such as elastic modulus and moment of inertia, determine the behavior of the beam. Different materials have different elastic properties and this has an effect on deflection.
    • Support Conditions: The conditions under which the beam is supported affect deflection. For example, a beam with one end fixed is expected to deflect less than a beam with the other end free.
    • Temperature Changes: Temperature changes can affect beam deflection by causing material expansion or contraction.
    • Type of Load Carried by the Beam: The type of load carried by the beam also affects deflection. For example, a beam under the influence of a concentrated load may behave differently than a beam under the influence of an evenly distributed load.

    These factors are important parameters determining beam deflection and should be considered in structural analysis.

    Hollow Rectangular Beam Deflection Calculation Formula and Example

    The deflection of a hollow rectangular beam is usually calculated using various differential equations. However, let us take a simple example and make an example with the formula for the elastic deflection of the beam. In this example, we will consider a central concentrated load applied on a simply supported hollow rectangular beam.

    The elastic deflection formula is as follows:

    \delta = \frac{{P \cdot L^3}}{{48 \cdot E \cdot I}}


    • δ: Deflection of the beam (m)
    • P: Applied concentrated load (N)
    • L: Length of the beam (m)
    • E: Elastic modulus of the beam material (Pa)
    • I: Moment of inertia of the beam (m^4)


    A hollow rectangular beam has the following dimensions:

    • Height (h): 0.1 m
    • Width (b): 0.2 m
    • Wall thickness (t): 0.02 m
    • Beam length (L): 3 m
    • Material elastic modulus (E): 200 GPa (200,000,000,000,000 Pa)
    • Concentrated load (P) applied on the beam: 10 kN (10,000 N)

    To calculate moment of inertia:

    I = \frac{{b \cdot h^3 - (b-2t) \cdot (h-2t)^3}}{12}

    Using these values you can calculate the deviation. However, for complex cases, engineering calculation software or specialized calculation tools are often used.