BUILT-UP STEEL-IRON REINFORCED-CONCRETE CONSTRUCTION OF MOTOR ROAD BRIDGE ROADWAY Russian patent published in 2003 - IPC

FIELD: bridge building. SUBSTANCE: proposed built up steel reinforced concrete construction of motor road bridge roadway includes cross metal bars installed for combined operation with built-up reinforced concrete plate of roadway. Novelty is that built-up reinforced concrete plate of roadway is made sectional over cross metal bar, being formed by two parts installed with clearance relative to each other and provided with beveled downwards opposite to each other end faces with stops in form of metal plates secured on said parts and combined by welding with rods of upper and lower reinforcements of roadway built-up reinforced concrete plate, with upper web of metal cross bar and between each other at level of center of gravity of roads of upper working reinforcement by means of connecting metal strips arranged in plan along axis of metal cross bar between units of connection of stops with rods of upper working reinforcement plate welded by ends to opposite stops of parts of built-up reinforced-concrete plate of roadway and space between them is filled with concrete. EFFECT: improved flexural rigidity of built-up steel reinforced-concrete construction of roadway, reliability and endurance of construction. 2 dwg