The BEBO Arch System provides the largest precast concrete arch spans in the world. The BEBO system part of the CONTECH Construction Products Inc. product offering is a combination of precast concrete arch elements headwalls wingwalls and cast-in-place footings. Available in spans from 12 to 102 feet BEBO can be a cost and time effective solution to short and medium span bridges overpasses tunnels and underground storage needs. The first BEBO arch structures were installed in 1966 and are still in excellent shape today.