Calculation of load capacity of H beam
I believe you still want to know the weight capacity of a steel beam and how to calculate it?
See too:
- How to calculate the shear stress and strength condition of the beam?
Alternatively, you may be interested in determining the proper size of an H beam for your construction project.
To help you, we have provided a robust beam load capacity calculator and load capacity chart as shown in the image below.
And it is in Excel format, which can perform the calculation automatically after entering the required information.
You can download the tool by clicking the link below. Don't forget to enable the macro function in Excel to ensure smooth operation.
- Steel Beam Load Capacity Calculator
Calculation of the load capacity of the I beam
The formula for bending load capacity is:
Mu=b'*h'*f*(0.5*h-0.5*h')+(0.5*h-h')*b*f*0.5*(0.5*h -H')
F – design value of the yield limit
b – web thickness
b '- flange width
h – high
h '- flange thickness
As for the tensile and compressive load capacity, I don't think it's necessary to explain it here. As for eccentric tension and compression, it is not very difficult to calculate it yourself.
For example:
How much can No. 25 I-beam support when the span is 4m and the load is evenly distributed?
Calculation:
For I-beam No. 25, W = 401.4 cm 3 (σ) = 210N/mm2, global stability coefficient φb = 0.93
Bending moment formula M = QL 2 /8
Force formula σ = M/W
According to the formula: q=8σW/L 2 =8* 210 *401400/4*4=42.1kN/m
General stability requirement: 42.1 * 0.93 = 39.2kn/m
Partial factor requirement (safety factor): 39.2 / 1.4 = 28kN/m
Safe use: 28kN/m
The calculation above does not consider the calculation of the self-weight and the deflection check of the I-beam.
Which of the H-beam steels and I-beam steels supports the best load?
H-shaped steel is more suitable for carrying loads.
Whether it is ordinary steel or light I-beam, due to their relatively high and narrow cross-sectional dimensions, the moments of inertia of the two main axes in the cross-section differ greatly.
As a result, it can only be used directly for bars subject to bending in the plane of their webs, or it can be formed into truss bars that carry stress.
It is not suitable for bars subject to axial compression or bending perpendicular to the web plane, limiting its scope of application.
On the other hand, H-section steel is an efficient and economical profile, thanks to its reasonable section shape, which increases its effectiveness and improves its cutting capacity.
Unlike common I-beams, the flange of H-beams is wider and its inner and outer surfaces are typically parallel, making it easier to connect to other members using high-strength bolts.
Its size forms a reasonable series and its models are comprehensive, making it convenient for design and selection purposes.
Characteristics of H Beam Steel
The inner and outer sides of the H-shaped steel flange are parallel or nearly parallel, and the end of the flange is at right angles, making it known as the parallel flange I-beam.
The thickness of the H-shaped steel web is smaller than that of an ordinary I-beam with the same web height, and the flange width is greater than that of an ordinary I-beam with the same web height, therefore also referred to as wide-flange I-beam.
The shape of the H beam results in better section modulus, moment of inertia and corresponding strength compared to a common I beam of the same weight.
When used in different metallic structures, the H beam presents superior performance in terms of bending moment, pressure load and eccentric load, resulting in better support capacity and the possibility of saving 10% to 40% of metal compared to an I beam. common. beam.
