Unequal Angles - L Sections - Structural Steel Angles

Mild steel unequal angles, also known as L-sections or asymmetric angle iron, are structural steel profiles defined by two legs of differing lengths forming an L-shape. Specifically engineered for reinforcement where asymmetric dimensions are required, these profiles provide a distinct practical advantage for engineers needing to adapt to unique connection points or specific load distributions. This varied geometry allows for improved adaptability in complex frameworks where standard equal-leg angles may be unsuitable.

They are known for their exceptional strength and durability, mild steel unequal angles are highly versatile and suitable for both short-term and long-term loading conditions. They are widely utilised across construction and engineering applications, serving as a critical component for support, framing, and structural reinforcement in projects that demand precision and directional strength.


Primary Applications

For primary applications and use cases, these sections are particularly effective for asymmetric bracing, providing the ideal solution for angled reinforcement within complex trusses and lattice frameworks. In general building and construction projects, they are used as secondary supports, lintels, and specialized floor or roof joists where standard profiles might not fit. They are also specifically designed for machinery and racking to support uneven loads or for adjustable shelving where flexible connection points are essential.

Unequal Angles - L Sections - Structural Steel Angles

Steel Unequal Angle Sizes & Weights

Size (mm) Kg/m
40 x 25 x 4 1.93
40 x 25 x 5 2.37
60 x 30 x 5 3.37
65 x 50 x 5 4.35
65 x 50 x 6 5.16
65 x 50 x 8 6.75
75 x 50 x 6 5.65
75 x 50 x 8 7.39
80 x 60 x 6 6.37
80 x 60 x 8 8.34
100 x 50 x 6 6.85
100 x 65 x 7 8.77
100 x 65 x 8 9.94
100 x 65 x 10 12.3
100 x 75 x 8 10.6
100 x 75 x 10 13.0
100 x 75 x 12 15.4
125 x 75 x 8 12.2
125 x 75 x 10 15.0
125 x 75 x 12 17.8
150 x 75 x 10 17.0
150 x 75 x 12 20.2
150 x 75 x 15 24.8
150 x 90 x 10 18.2
150 x 90 x 12 21.6
150 x 90 x 15 26.6
200 x 100 x 10 23.0
200 x 100 x 12 27.3
200 x 100 x 15 33.7
200 x 150 x 12 32.0
200 x 150 x 15 39.6
200 x 150 x 18 47.1
The Barrett Advantage: Technical Versatility
We stock unequal angles in both S275JR and S355JR grades, providing the weldability and strength required for diverse engineering tasks. Barrett Steel enhances these sections with specialist in-house processing, including automated plasma coping, cutting and precision drilling. Every section is backed by full mill test certification, ensuring 100% UKCA/CE compliance across our nationwide logistics network.

To order Unequal angles, use find a depot button below, type in your postcode and contact your local depot directly.

Expert FAQs

Specific to Barrett Steel
With 25+  depots across the UK and Ireland our dedicated fleet ensure nationwide delivery to any site.
Yes. We offer automated Shot-blasting and Priming to protect steel from rust during construction. We shotblast to Sa2.5 standard.
General Facts
Unequal angles are ideal for asymmetric load conditions or where connection space is limited.
We stock them in both S275JR and S355JR grades.
Yes, the asymmetric design allows for precise load transfer in trusses and lattice structures.
Unequal angles are primarily used in asymmetric load conditions or where connection space is restricted. The different leg lengths allow for a higher moment of inertia (resistance to bending) on one axis while maintaining a compact profile on the other. This makes them more efficient than equal angles for specific structural bracing and lintel supports.