Rolled beam-in-concrete

French WIB railway bridge from below

New construction of the Zwenkauer Strasse bridge as a rolled girder-in-concrete bridge

Rolled girder-in-concrete (WiB) is the name for a composite construction in bridge construction for short superstructures . The superstructure consists of several hot - rolled profiles laid close together and transverse reinforcement made of reinforcing bars . The rolled girders serve as formwork for the in-situ concrete slab during construction .

WiB bridges are particularly popular in railway construction as they do not require any falsework and therefore no line closures.

The first WiB bridges were built in the 1870s. Until the First World War they had a share of 50% in all short railway bridges.

literature

• Günter Seidl, Anton Braun: VFT-WIB bridge near Vigaun - composite bridge with external reinforcement . In: Stahlbau (magazine) . tape 78 , no. 2 , February 2009, p. 86–93 , doi : 10.1002 / stab.200910009 .
• Rolf H. Pfeifer, Tristan M. Mölter: Manual Railway Bridges . Eurailpress, Hamburg 2008, ISBN 978-3-7771-0378-5 .