REPORT ON BRIDGES BUILT BETWEEN 1971 AND 1975

A LIST IS GIVEN OF BRIDGES CONSTRUCTED IN SPAIN DURING THE LAST 5 YEARS; IT ENCOMPASSES ALL TYPES OF PRESTRESSED CONCRETE STRUCTURE AND ALL CURRENTLY USED CONSTRUCTION METHODS, E.G., CONTINUOUS GIRDERS WITH MARKED PLANE CURVATURE FOR TYPICAL 30 M URBAN BRIDGE SPANS BUILT ON SCAFFOLDINGS, CONTINUOUS 130 M SPAN SECTIONS FOR VERY HIGH BRIDGES PRECAST IN SUCCESSIVE CANTILEVERS. DETAILS ARE GIVEN OF THE LAUNCHING OF GIRDERS, AND THE PREFLEX SYSTEM WITH WHICH PRECAST GIRDERS OF 1/20 SLENDERNESS CAN BE BUILT IN A PLANT. MENTION IS MADE OF A DRAFT STANDARDIZATION OF BRIDGE PIERS, BOX GIRDERS AND BRIDGE DECK SLABS.