The BEBO Arch System The BEBO System is a patented precast concrete arch system for the design and construction of earth overfilled bridges, culverts and underground structures. The fully pre-engineered BEBO System features the world ‘ s largest span precast concrete arches, offering spans from 3.6m up to 25.6m and more. BEBO ‘ s experience and dedication over many decades as well as countless applications instil confidence – each shape has been applied numerous times. The fully pre-engineered system stands apart from other products through the strength of its distinctive arch action and extensive technical support by local BEBO Licensees and the BEBO Design Centre in Zurich, Switzerland. BEBO arch bride infrastructure application for Overpass , Underpass of Railway and Highway project.