What Are Steel Beams?

Beams made of steel. Crane beams and working platform beams in factory buildings, floor beams in multi-storey buildings, purlins in roof structures, etc., can all use steel beams.

Steel beam

(Beam made of steel)

The size of the steel beam section must be determined through calculation and meet the three main requirements of strength, overall stability and stiffness. The first two guarantee the safety of the steel beam in use, and the latter guarantees that no excessive deformation will occur in order to facilitate normal use. In addition to the cross-sectional dimensions of the composite beam, in addition to meeting the three requirements above, it must also meet the local stability requirements of each component. The thickness of hot-rolled steel section is relatively large, and local stability can generally be guaranteed.

Limited to transportation conditions, the beams are made in sections at the factory, transported to the site and then spliced into a whole, which is called site splicing. Due to insufficient steel size, the splicing completed by lengthening or widening the various components of the beam in the manufacturing plant is called factory splicing. At the splicing point, the strength of the beam should not be weakened and the continuity of deformation should be ensured. The factory splicing of composite beams should spread the joints of the flange plate and the web plate at different sections. In order to facilitate transportation, the joints of the flange plate and the web plate in the construction site splicing may be set on the same cross section, but it should be set in a part with less force. The splicing method generally adopts bevel butt welding seam connection, which can save labor and materials; but for the site splicing of heavy beams, it can also be connected with high strength bolts of splicing plates to improve the splicing quality and improve the dynamic performance of the beam.