Prestressed concrete highway

Claim 1

A METHOD OF CONSTRUCTING A CONCRETE HIGHWAY COMPRISING, GRADING A ROADBED, DIGGING TRANSVERSE TRENCHES THEREIN AT LONGITUDINALLY SPACED LOCATIONS AND ERECTING FORMS ABOUT AND ABOVE THE TRENCHES, PLACING OPENINGFORMING MANDRELS HORIZONTALLY ACROSS THE FORMS ABOVE THE ROADBED LEVEL AND EXTENDING LONGITUDINALLY OF THE ROADBED, POURING CONCRETE INTO THE TRENCHES AND FORMS AND ABOUT THE MANDRELS TO FORM FOOTED PIERS WITH RAISED JACKHEADS HAVING OPENINGS THERETHROUGH, THREADING CABLES THROUGH THE OPENINGS AND SPANNING THE SPACE BETWEEN PIERS AFTER THE CONCRETE HAS SET, TENSIONING THE CABLES BY JACKING AGAINST THE JACKHEADS, ANCHORING THE TENSIONED CABLES TO THE JACKHEADS, POURING A CONCRETE SLAB UPON THE ROADBED BETWEEN THE PIERS AND EMBEDDING THE CABLES, AND RELEASING THE ANCHORED CABLES AFTER THE CONCRETE SLAB HAS SET.

Claim 2

A METHOD OF CONSTRUCTING A CONCRETE HIGHWAY COMPRISING, GRADING A ROADBED, DIGGING TRANSVERSE TRENCHES THEREIN AT LONGITUDINALLY SPACED LOCATIONS AND ERECTING FORMS ABOUT AND ABOVE THE TRENCHES, PLACING OPENINGFORMING MANDRELS HORIZONTALLY ACROSS THE FORMS ABOVE THE ROADBED LEVEL AND EXTENDING LONGITUDINALLY OF THE ROADBED, POURING CONCRETE INTO THE TRENCHES AND FORMS AND ABOUT THE MANDRELS TO FORM FOOTED PIERS WITH RAISED JACKHEADS HAVING OPENINGS THERETHROUGH, THREADING CABLES THROUGH THE OPENINGS AND SPANNING THE SPACE BETWEEN PIERS AFTER THE CONCRETE HAS SET, TENSIONING THE CABLES BY JACKING AGAINST THE JACKHEADS, ANCHORING THE TENSIONED CABLES TO THE JACKHEADS, POURING A CONCRETE SLAB UPON THE ROADBED BETWEEN THE PIERS AND EMBEDDING THE CABLES, AND RELEASING THE ANCHORED CABLES AFTER THE CONCRETE SLAB HAS SET.