Steel Beam Sizes is designed as a practical worldwide resource for comparing structural steel beam families, designations, dimensions, mass and commonly used section properties. Structural steel terminology and design rules vary between countries, so this page keeps the main workflow global while allowing the user to choose the section family, units and standards relevant to the project. It is intended for engineers, fabricators, buyers, estimators, architects and contractors. The aim is to make structural steel information easier to search, compare and check without hiding the assumptions behind the result. Where a calculation or section recommendation could influence a real structure, the result should be treated as preliminary information and verified by a suitably qualified professional using the applicable local code.
What the section tables contain
This page is organised around designation, depth, flange width, web thickness, flange thickness, mass and section properties. The goal is to let users move quickly from a familiar designation to reliable dimensional and geometric data, then compare adjacent sizes without opening multiple catalogues. Useful outputs include searchable size tables, unit conversions, related sections and links to individual section records. Search and filters should work with both the complete designation and partial terms so that a user who knows only an approximate depth or family can still find the relevant records.
Section names are regional
regional naming systems, obsolete sections, manufacturer availability, grade differences and dimensional tolerances. StructuralSteel.ai therefore treats section terminology as connected data, rather than assuming one naming convention. A broad-flange section may be searched as a W-shape in the United States, a Universal Beam in the UK and some other markets, an HE or IPE family in parts of Europe, or simply an I-beam or H-beam in general conversation. This page connects those terms while keeping the underlying standard, geometry and source distinct.
Dimensions, mass and section properties
Nominal depth alone is not enough to describe a structural section. Engineers and fabricators often need flange width, web thickness, flange thickness, root radius, cross-sectional area, second moment of area, elastic and plastic section modulus and radius of gyration. Estimators may care most about mass per unit length, while detailers may need exact geometry and clearance dimensions. Presenting these values together makes the database useful to several audiences and creates stronger internal links to calculators, design guides and individual section pages.
How to use the data
Use these tables for identification, comparison, estimating and preliminary analysis. For final engineering work, confirm that the section is available in the project market and that the data corresponds to the adopted standard or producer information. Historic and superseded sections should be labelled clearly rather than mixed with current production ranges. If a project is being converted between metric and imperial units, retain the original designation and source as well as the converted values; rounding a section into a different regional family can create misleading results.
Data quality and version control
For steel beam sizes, data quality is as important as presentation. Every numerical dataset carries a source, unit system and revision or publication date where available. When values are updated, enough provenance is retained to understand what changed. This is particularly important when section ranges are revised, standards move to new editions or a manufacturer changes a published product range. Calculated values, published values and AI-generated explanations are clearly labelled, so users know which layer they are reading.