A top-hat beam (also called a top-hat section or omega profile) is a thin-walled, cold-formed steel section whose cross-section looks like a top hat: a flat top with sloping or straight sides and outward-turned flanges. This shape makes the section light yet stiff.
Shape and properties
- Top-hat shape — a raised central part with horizontal foot flanges
- Cold-formed — pressed from thin steel sheet, not rolled
- Light and stiff — much stiffness for little weight
- Fixing flanges — the outward-projecting feet are easy to screw or weld
Application
Top-hat beams are used, among other things, as:
- Purlin — as a roof member between the trusses of a steel roof
- Floor support — as part of composite steel-and-concrete floors or lightweight floor systems
- Support profile — for facade cladding, ceilings and partition systems
- Batten — in lightweight constructions where a metal section is preferred
The upward-facing central part provides a bearing edge, while the feet give a large fixing surface. This makes the section popular in commercial and facade construction.
Related terms
- Beam
- Purlin
- Structural steel
- Cold-formed
- Metal stud
- Steel
Want to learn more about construction terms? Visit our knowledge base at fredsdiyplans.com.