The present invention relates to a crossmember (1) OF CONCRETE FOR RAILWAY, INCORPORATED IN URBAN AREA, TO SUPPORT SLAB (12) TYPE concreted BIBLOQUES TACOS comprising two sides (2,3) connected by a TIRANTE METALICO (4), a rail (7.8) POSTED IN EVERY TACO (2.3) FIJACIONES BY RAIL (14), wherein the thickness OF TACOS SUPPORT UNDER RAIL AND WHY IS REDUCED IN THE BRACE UNDERSTANDS CENTRAL PART ONE BEND (16) allowing the realization of a drain wire (11) bLASTING IN THE WATERS OF SLAB SUPPORT (12) substantially along the axis (13) of the road.
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