H Beam for Buliding Carbon Steel

• What is the H-beam?

I-beam refers to a beam with an H-shaped cross section. The upper flange is called the upper flange, the lower flange is called the lower flange, and the plate connecting the two flanges is called the web. The upper and lower flanges are not equal in width and are called unequal-flange H-beams. H-beams include steel beams, reinforced concrete beams, and prestressed reinforced concrete beams. The latter two are generally unequal-flange H-beams with a larger upper flange than the lower flange.

• What is stronger, H-beam or I-beam?

‌H-beam and I-beam are both strong structural beams, but H-beam is generally stronger.‌

H-beam and I-beam are both used in construction and have their own unique properties. H-beam is shaped like an "H" and is made of rolled steel, making it incredibly strong. It gets its name because it looks like a capital "H" over its cross section. H-beam is formed by welding or riveting three separate pieces of metal together, and all three parts are equal in thickness, which further enhances its strength‌12.

I-beam, on the other hand, is shaped like an "I" and consists of two horizontal planes (flanges) connected by a vertical component (web). I-beam has more tapered edges and its cross section has a higher height than the width of its flanges. It is made of a single piece of metal that has been shaped, which makes it slightly less strong than H-beam‌12.

In terms of strength, H-beam is often considered stronger due to its construction method and the fact that it is made up of three separate pieces welded or riveted together, providing greater structural integrity and strength‌12.

• ‌How to calculate H-beam?

‌H-beam weight calculation method‌
The weight calculation of H-beam is mainly based on its cross-sectional dimensions and steel density (usually 7.85 g/cm³). The following are two commonly used formulas:

1. General formula (unit: kg/m):

\text{weight} = 0.00785 \times \left[ h \times \frac{(b1 + b2)}{2} \times t1 + (h - t1) \times b3 \times t2 \right]

Parameter description:
( h ): Total height of H-beam (mm)
( b1, b2 ): Upper and lower flange width (mm)
( t1 ): Flange thickness (mm)
( b3 ): Waist width (mm)
( t2 ): Waist thickness (mm)
Example: H-beam with specifications of 200×200×8×12 (( b1=b2=75 ) mm, ( b3=10 ) mm), weight per meter is 50.1 kg.

‌2. Simplified formula‌ (unit: kg/m):

\text{weight} = 7.85 \times \left[ \frac{t1 \times (h - 2t2)}{1000} + \frac{2 \times b2 \times t2}{1000} \right]

Applicable to the case where the fillet is ignored‌.
‌Total weight calculation‌:
If the length is (L) (meters), the total weight = weight per meter × (L). For example, the total weight of a 6-meter-long H-beam is 50.1×6=300.6 kg‌.

‌Notes‌:

The actual weight may deviate slightly due to processing (cutting, welding).
The load-bearing calculation needs to be combined with the section characteristics and load formula (such as bending moment/bending modulus).

• What is H-beam called?

The common Chinese name of H-beam is ‌H-shaped steel‌, which is named after its cross-sectional shape similar to the letter "H". In addition, in different technical contexts, it is also called:

Wide flange I-beam‌ (emphasizing its wide flange structure)
I-beam‌ (as a load-bearing component in building structures)
Wide flange I-beam‌ (combines flange characteristics and functional descriptions)

These names all refer to the same steel section form, whose design feature is to form a high-strength support structure through parallel upper and lower flanges and a middle web.

• When to use H-beam?

H-beam is a highly efficient structural steel material suitable for the following scenarios:

1. Civil engineering

High-rise buildings and industrial plants
H-beam is suitable for steel columns, beams and frame structures due to its wide flange and parallel inner edge design, especially for earthquake-prone areas and large-span plants.

Bridge and subway engineering
H-beam's high section modulus and bending resistance make it a preferred material for bridge main beams, piers and subway support structures.

2. Heavy machinery and equipment

Crane machinery and shipbuilding
H-beam's stability and load-bearing capacity meet the needs of heavy equipment such as crane rails and ship frames.

Industrial equipment frame
H-beams made of materials such as Q235B and Q345B are widely used in industrial equipment bases and load-bearing brackets.

3. Special demand scenarios

High temperature or corrosive environment
H-beams made of materials such as SS400 and SM490 are suitable for structural support of high-temperature workshops or chemical plants.
Projects with economic and efficiency priority ‌
Compared with traditional I-beams, H-beams can save 10%-40% of metal and improve welding and assembly efficiency by about 25%, making them suitable for projects with tight schedules or cost sensitivity.

4. ‌Scenario for replacing I-beams ‌
When higher bending strength or reduced cross-sectional deformation is required, H-beams are more suitable for symmetrical loads and large-span structures than I-beams due to their wide flanges and thin webs.