An angle is a hot-rolled steel section with an L cross-section; its two legs stand at right angles to one another. It is used in steel construction as a connection, corner and reinforcing member.
It comes in two main forms, equal-leg and unequal-leg; the choice follows the direction the load comes from and the geometry of the connection.
Technical specifications
| Equal leg | 20×20×3 – 200×200×20 mm |
|---|---|
| Unequal leg | 30×20×3 – 200×100×12 mm |
| Grade | S235JR, S275JR |
| Standard | EN 10056 |
| Length | 6,000 / 12,000 mm |
| Use | Structural work, towers, racking |
Equal leg or unequal leg?
An equal-leg angle is a symmetrical section; it is used where the load comes similarly from both directions. Racking systems, lattice structures and general connections are its typical field.
An unequal-leg angle is preferred where more strength is needed in one direction; it is often seen in beam connection details.
Choosing the grade
S235JR is a general structural steel and is sufficient for most work. S275JR offers a higher yield strength and is preferred in load-intensive structures.
The choice of grade belongs to the structural calculation for the project. Weldability and impact toughness also enter the calculation.
Where it is used
- Connection and corner members in steel structures
- Racking and warehouse systems
- Towers, masts and lattice structures
- Machine bodies and chassis reinforcements