How does the cantilever method allow prestressed-concrete bridges to be built without falsework?

The cantilever method allows for the construction of prestressed concrete bridges without the need for falsework by building the structure in short, sequential segments.1

In this process, each new segment is cast and then prestressed onto the previously completed portion of the bridge. Because each newly added segment is supported by the existing structure, the bridge effectively supports itself as it is extended outward from the piers. This eliminates the requirement for temporary scaffolding or falsework, which would otherwise be necessary to hold the concrete in place while it cures. This technique, developed by engineers such as Ulrich Finsterwalder, also offers economic advantages by reducing the need for materials and avoiding the logistical challenges of erecting scaffolding over water or deep valleys.12