Analysis of the top hat beam

The top hat beam (THQ) is a versatile steel structure consisting of four steel components that together form a stable concept. These components are carefully designed to give the beam its characteristic properties.

A strong foundation

The foundation of the top hat beam is formed by a wide bottom flange. This flange extends on one or both sides of the web, providing stability and support for concrete slabs. With its width, the bottom flange contributes to the load-bearing capacity of the beam, enabling it to withstand significant loads.

A notable feature of the top hat beam is the presence of two vertical web plates. These plates add an extra dimension of robustness to the structure. What is remarkable is that these web plates can even be placed at an angle, providing engineers with flexibility in creating connections and meeting specific design requirements. The top flange is placed between the vertical web plates, and then the beam is welded along its entire length. Together with the other steel components, this forms the basis for the structural integrity of the beam and provides a unique support for the loads exerted on the profile. This design makes the integrated beam extremely resistant to torsion, even under loads.


Unlike IFB or SFB beams, which have a greater fire resistance thanks to reinforcing bars, it is necessary to apply a coating to the outside of the bottom flange for THQ beams.

Applications of the Top Hat Beam

The top hat beam is used in buildings with multiple floors and low heights, both in (utility) construction and civil engineering, especially where high demands are placed on torsion, such as in bridge construction.

Efficient designs with high torsional rigidity
Standardization in the production process to save time and costs
Low overall height