The sliding door, until a few decades ago, it was made with craft systems that did not guarantee the functional aspects of existing solutions.

Until some time ago the concept of sliding door was addressed to a completely external, obviously cumbersome, which does not allow the use of the wall on which it flowed the door. concretely To resolve this problem, a system was in use craft, which provided for the creation of a cavity (where slide the door), between two walls located parallel. addition to the loss of space, there was also an aspect technician to evaluate, due to the adaptation of sliding devices created for outdoor use. A these conditions came to the aid of a proposal, innovative for its time, which provided a frame of galvanized sheet, the thickness of the partition, and within a sliding mechanism. With this system, have been solved many problems of functional in addition to the possibility of installing doors of different sizes, with blind panels, glass inserts in one or two doors.

Subsequently, in addition to counter frames for partitions in hollow bricks, were also produced elements suitable for plasterboard walls. Even for these systems, apply the directions constructive to be implemented both in the design both in the course of the work. A first factor is the position of the sub frame retractable place orthogonally with respect to a tow or another compartment opening. On this point it is well to note the critical of ‘Detachable corner, between the wall and the metal housing, and the creation of a crack even in consequence of the vibrations caused by the opening and closing of the slide. Other particular not to be overlooked is the poor resistance of the portion of wall, especially if of small size (10/15 centimeters), which will become, in fact, the swing of the door placed at the side. To reinforce this area, it is advisable to adequately stiffen the outer face of the metal housing to then proceed to the paving of a shaving with fiber-reinforced material armed with plaster-port network, extended to any angle.


Following these directions, to avoid, if possible, the laying of two sub frames placed in a position orthogonal to each other. A further aspect is determined by the size of the hole wall, equal twice light sash and therefore from need verify prematurely this width during plan. Other detail important is not consider dumpster metallic as element carrier and that withstand weight wall overlying. Hence need to place a lintel extended for the entire length (wall + light footprint sub frame). To these conditions are very useful of pallets made ​​of reinforced concrete, with square section, commercially available and usable as bearing elements.