1. Equal angle, unequal angle 

2. Stabdard: GB/T 9787, GB/T9788, JIS, ASTM, EN 

3. Size: 2#-20# 

4. Length: 5.8m, 6m, 8m, 9m, 12m, 11.8m or as the customers' request. 

5. Application: 
- Various building structures, such as beams, bridges, transmisson towers, lifting or transporting machines, shipping, industrial boilers 
- Framework of all kinds of construction and engineering 
- Construction joist 
- Iron tower 
- Derrick frame and so on 

6. Descriptions 
- Definition: Angle steel is a kind of strip steel bearing the section with two orthogonal sides 
- Equal angle: The kind which has two same uprightness borders is equal angle. 
- Unequal angle: The kind one border long and another short is unequal angle. 
- Its specification is described by border width * border width * border thickness (mm).