Roof and floor beams are widely used in single-floor and high-rise industrial and civil construction for roof and floor deck installation. Together with the building columns, they bear the weight of the snow cover on the roof, wind loads, and seismic vibrations, and provide rigidity and stability of the steel framework.
Welded steel beams can be used to cover large building bays (up to 40 m long) and to ensure reliable operation of the built-in suspended crane equipment. They can have both uniform and variable section.
Welded floor beams, in turn, are used in custom structural designs to construct beam-and-girder floors in high-rise buildings with regard to safety and appearance requirements. Usually, they are uniform in section along their entire lengths.
Roof and floor beams are made from welded I-beams, hot-rolled channels, pipes, and I-beams.