1. The Steel Profile Family
Steel profiles are hot-rolled or cold-formed sections classified by their cross-section shape. The main families are open sections such as U-channels, H-beams and angles, and hollow sections such as round bars and square pipes. Each shape is rolled or formed in carbon steel grades like Q235, Q355, A36, SS400 and S235JR, so the same grade logic applies across the whole range.
2. U-Channels and H-Beams
U-channels have a U-shaped cross-section used for edge beams, frames and secondary members where bending acts in one plane. H-beams have parallel flanges and a wide flange, giving high stiffness about both axes for columns and main beams. Both are supplied in standard size series with tolerances to the national standard, and both can be galvanized for outdoor service.
3. Angle Steel
Angle sections have two legs at a right angle and come in equal-leg and unequal-leg forms, sized by leg length and thickness such as 50 x 50 x 5 mm. They are the workhorse of bracing, trusses, brackets and light framing because they are inexpensive and easy to bolt and weld. Angles can be combined into built-up sections when more capacity is required.
4. Round Bars and Square Pipes
Round bars are used for machining, shafts, anchors and reinforcement, and are supplied in diameters from a few millimetres to over 200 mm in bright or black finish. Square pipes, also called square hollow sections, are welded or seamless tubes with a square cross-section used for columns, railings, frames and gates. Both are cut to length and supplied with mill certificates.
5. Ordering Building Material Profiles
When ordering mixed profiles, list the section type, size, grade, length and quantity for each item, and confirm the delivery standard. Combining several profile types in one order reduces freight cost per tonne. Ask for the mill test certificate and coating details so the material matches the project specification from the start.