Prestressed concrete
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Prestressed concrete is a form of concrete used in construction. It is substantially prestressed during production, in a manner that strengthens it against tensile forces which will exist when in serv
Pre-tensioned bridge girder in precasting bed, with single-strand tendons exiting through the formwork
Pre-tensioned, precast hollow-core slab being placed
Post-tensioned tendon anchorage; four-piece lock-off wedges are visible holding each strand
Balanced-cantilever bridge under construction. Each added segment is supported by post-tensioned tendons.
Box girder bridge
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A box girder bridge, or box section bridge, is a bridge in which the main beams comprise girders in the shape of a hollow box. The box girder normally comprises prestressed concrete, structural steel,
Underneath the No. 2 Road Bridge in Richmond, British Columbia, Canada
Erskine Bridge, near Glasgow, Scotland
Single box girder bridge (concrete), Australia. A similar bridge on this river was fabricated ashore and pushed across its pylons.
Single box girder bridge (steel), flyover above eastern approach of the San Francisco–Oakland Bay Bridge