1.19 : 構造用鋼製品

Structural steel products are manufactured in a structural mill, where the beam blank is reheated and refined through rollers into the required shape and size.

Adjusting the roller spacings in the structural mill produces families of structural sections with related shapes.

The final form is a continuous length from the last rollers, segmented by a hot saw. Segments are cooled and straightened to ensure uniformity.

Heavier sections are produced by welding together flange and web plates, rather than by rolling.

Structural shapes are identified by standard nomenclature with a letter for the shape and numbers for size, thickness, or weight.

Examples include beam, column, channel, and T shapes, identified by shape, nominal depth, and weight.

Angles, hollow sections, bars, and plates are designated by shape, size, and thickness.

Structural steel can be cold-worked via rolling, bending, or stretching at room temperature, modifying the members' shape.

Thin steel sheets form lightweight C-sections, while thicker sheets are cold-formed into various hollow shapes, which are then welded along their longitudinal seams.