1. What a Universal Column Is
A universal column, abbreviated UC, is a hot-rolled H-section with parallel flanges and a flange width close to the section height. The family was standardised so that the same nominal size is available at several weights per metre, letting the designer match capacity to load without changing the connection geometry too much. The 152 by 152 millimetre size is the smallest of the common range.
2. The 152x152 Sizes
Within the 152 by 152 millimetre nominal size the range includes sections at approximately 23, 30 and 37 kilograms per metre. As the weight rises, the flange and web thicknesses increase, so the section becomes stronger and stiffer while the overall depth stays close to the same. The exact dimensions and section properties are taken from the profile standard used for the design.
3. Grade Options
S235 offers a minimum yield of about 235 megapascals and is the economical choice for lightly loaded columns, posts and frames. S275 raises the yield to about 275 megapascals for moderate loads. S355 gives about 355 megapascals and is selected where the column carries heavy axial load or where bending and buckling govern, which is common in multi-storey and industrial work.
4. Applications
Compact universal columns are used for building columns, mezzanine posts, portal frame columns, equipment supports, crane gantry legs and temporary works. Their square proportion and parallel flanges make them convenient for bolted base plates and cap plates, and for framing connections on two axes. Because the section is stocky, it resists weak-axis buckling well in a short column.
5. Ordering and Fabrication
An order should state the grade, the exact section including its mass per metre, the length, the quantity and the finish. The mill test certificate should report yield, tensile, elongation and chemistry for the heat, together with impact results if an impact class is specified. Where the columns are exposed, shot blasting and priming or hot-dip galvanizing should be specified, and the coating standard stated.
Frequently Asked Questions
Q: What does UC 152x152 mean?
It is a universal column with nominal dimensions of 152 by 152 millimetres, available in several weights per metre.
Q: How many weights are there in the size?
Commonly about 23, 30 and 37 kilograms per metre, with thicker flanges and web in the heavier sections.
Q: Which grade should be used?
S235 or S275 for light and moderate loads, and S355 where axial load, bending or buckling governs.
Q: Is UC the same as an H-beam?
It is a standardised H-section column family, and the parallel flanges give the same connection advantages.
Q: Can the columns be galvanized?
Yes, hot-dip galvanizing is common for exposed or damp locations.