Constructive arrangement introduced in crossmember and base rail form, for joining joists and lattice pre-slabs, for concrete filling

摘要

Constructive arrangement introduced in a set of crossmember and base rail formwork, for fitting of joists and lattice pre-slabs, for concrete filling. Consisting of a rail (1) which may be made of steel or plastics material, having in both embodiments a plurality of equally spaced perforations (2) arranged along the extension of their base surface which after filling the chute, the concrete overflows, forming adhesion points for its subsequent mortar coating, and male-type plug-in elements (3) are provided, arranged on the lateral edges of the chute, which will cooperate with each other. the female-type locking elements (4) provided on the crossmember (5), and whose positions neutralize the reaction forces generated as a result of both the filling and the covering of the rail by the concrete, ensuring the integrity of the joining of these elements. and the crossmember also has housings (6) for the underside of the truss frame, overlapped by arms (7), with an angle (&) which may vary from -10 ° to 80 ° to to ensure correct positioning of the truss frame in relation to the shoe to be formed, and arranged at a distance (x) from the side edge of the crossbar, which may vary from 10% to 30% of the total length of the crossbar, to ensure the correct covering. lower flanges, preventing their oxygenation, and consequently their oxidation