IFB Type A: A lower plate is welded onto a section cut at the web. The distance BP has to be determined in accordance with the specific requirements of the slab elements.
IFB Type B: A welded plate replaces the upper flange of a hot rolled section cut at the web. IFB Type B beams are suitable for small spans.
By optimising usable spaces, asymmetric beams incorporated into the floor provide significant height gains and allow one or more additional floors to be built. This system also allows air ducts and services to be easily routed while complying with fire regulations.
These prefabricated elements: