Dimensions and specifications of unequal angle steel:

GB/T2101-89 (General provisions for acceptance, packaging, marking and quality certificates of section steel); GB9787-88/GB9788-88 ( Hot-rolled equilateral/unequal-edge angle steel size, shape, weight and tolerance); JISG3192-94 (shape, size, weight and tolerance of hot-rolled section steel); DIN17100-80 (quality standard for ordinary structural steel); ГОСТ535 -88 (technical conditions for ordinary carbon steel).

According to the above standards, unequal angle steel should be delivered in bundles, and the number of bundling passes and the length of the bundle should comply with the regulations. Unequal angle steel is generally delivered naked and moisture-proof must be paid attention to during transportation and storage.

Angle steel, commonly known as angle iron, is a long strip of steel with two sides perpendicular to each other. There are equilateral angle steel and unequal angle steel. The two sides of the equilateral angle are equal in width. Its specifications are expressed in millimeters of side width × side width × side thickness. For example, "∠30×30×3" means an equilateral angle steel with a side width of 30 mm and a side thickness of 3 mm. It can also be expressed by model number, which is the number of centimeters of side width, such as ∠3#.

The model number does not indicate the dimensions of different side thicknesses in the same model. Therefore, the side width and side thickness dimensions of the angle steel should be filled in completely on the contract and other documents to avoid using the model number alone. The specifications of hot-rolled equilateral angle steel are 2#-20#.

Angle steel can be composed of various stress-bearing components according to different needs of the structure, and can also be used as a connector between components. It is widely used in various building structures and engineering structures, such as roof beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouses.