ASTM A36 Structural Steel H-beam & I-beam —Factory Direct Sale

H-beam is an economical section and high-efficiency section with more optimized cross-sectional area distribution and more reasonable strength-to-weight ratio. The cross-section of H-beam usually includes two parts, the web plate and the flange plate, also known as the waist and the edge. Since all parts of H-beam are arranged at right angles, H-beam has the advantages of strong bending resistance, simple construction, cost saving and light weight in all directions, and has been widely used. The main materials of H-beam are Q235B, SM490, Q345, SS400, Q345B, etc.

H-beam classification

There are many product specifications of H-beam, and the classification methods are as follows.

(1) According to the flange width of the product, it is divided into wide flange H-beam (HW), middle flange H-beam (HM) and narrow flange H-beam (HN). The flange width B of wide flange and middle flange H-section steel is greater than or equal to the web height H. The flange width B of the narrow flange H-beam is approximately equal to one-half of the web height H.

(2) According to product use, it is divided into H-shaped steel beam, H-shaped steel column, H-shaped steel pile, and extremely thick flange H-shaped steel beam. Sometimes parallel leg channels and parallel flange T-beams are also included in the scope of H-beams. Generally, the narrow flange H-beam is used as the beam material, and the wide-flange H-beam is used as the column material.

H-beam is used as a common superstructure element for bridges between approximately 20 and 90 feet. These elements are aligned parallel to traffic flow under the bridge deck to support the loads of the bridge. Generally the deck is attached to the girders in such a way to make the deck and girders behave cooperatively as composite members. While in longer spans the unit weight of steel used for the bridge can be higher than that of steel plate girders, the unit cost of steel is much lower for rolled members. Transverse stiffeners are not normally required for rolled sections and simple diaphragm details aid in making rolled sections an affordable superstructure.

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