What are the differences and similarities between unequal-leg angle steel and equal-leg angle steel?

Galvanized angle steel has two sides of equal length, forming a perfectly symmetrical right-angle structure. A common specification, such as ∠50×50×5, indicates that both sides are 50 mm wide and 5 mm thick. Due to its regular shape and uniform stress distribution, it is often used in structures requiring symmetrical load-bearing.

Unequal-leg galvanized angle bar, as the name implies, has two sides of different lengths. For example, ∠100×80×8 represents a long side of 100 mm, a short side of 80 mm, and a wall thickness of 8 mm. This asymmetrical design allows it to play a unique role even in asymmetrical structures or under specific spatial constraints, enabling optimal material utilization.

1. The side lengths of equal-leg angle steel are identical; for example, the commonly used No. 4 angle steel refers to 40×40×4 angle steel. "40x40" indicates that both sides are 40 mm; if both sides are the same length, it is an equal-leg angle steel; whereas unequal-leg angle steel has different side lengths, with one side longer than the other;
2. Equal-leg angle steel specifications range from No. 2 to No. 20; unequal-leg angle steel specifications range from ∟50*32 to ∟200*125;
3. Equilateral angle steel is widely used in engineering structures such as bridges, transmission towers, lifting and transport machinery, ships, and warehouse shelving; unequal-leg angle steel is widely used in various municipal, public, civil, and military industrial structures, such as industrial building beams, industrial furnaces, reaction towers, and container racks. Since it is used in smaller quantities than single-leg angle steel, its price is relatively higher.

1. The material of equal-leg angle steel and unequal-leg angle bar is the same: Q235B angle steel and Q345B angle steel;
2. Standard lengths are generally: 6m angle steel, 9m angle steel, and 12m angle steel;
3. The calculation method is also the same: Weight per meter = 0.00785 * (Side width + Side width - Side thickness) * Side thickness.