Angle
Angles are categorized into two groups based on their production methods:
- Pressed Angle: Produced using a black sheet of steel, pressed angles are made through a cold forming process, similar to the production of pressed UNP. A cut steel sheet with a specific cross-section length is passed through the production line. Pressed angles are typically made from construction steel St37. Due to the lower cost of the sheet compared to blooms, the production process is less expensive and results in lower resistance.
- Fabric Angle: Fabric angles are produced using a hot rolling process. This method involves forming molten blooms, which have different mechanical properties compared to pressed angles. For more details on blooms, refer to relevant sources.
Types of Angles in Terms of Appearance
- Equal Wing Angle: This refers to profiles with two vertical wings of the same size. It is represented by the letter “L” alone (L). For example, the symbol L200 indicates an angle with equal wings, each 200 mm in size.
- Unequal Wing Angle: When using an equal wing angle is not feasible, an unequal wing angle is used. This type of angle has two vertical wings of different sizes. It is available in the market with standards such as ST37, ST52, and ST44, and is marked on building plans with the sizes of both wings next to the letter “L”. For example, L200*300 indicates an angle with two unequal wings, measuring 200 mm and 300 mm, respectively.
- Spiral angle: It is a type of light equal wing corner that is made from 20x20x2 to 50x50x5. The spiral corner is known in the market as equal wing hot rolling.
