TUBULAR FRAME FOR OUTSIDE AND INSIDE METAL DOORS, WITH INVISIBLE INSTALLATION AND THE POSSIBILITY OF BEING FIRE-RESISTIVE

摘要

This invention refers to a new invisibly installed tubular steel frame for exterior and interior doors, which allows several types of assembly: flush to the wall in the opening direction, in the closing direction and assembled in a corridor, and also offers the possibility of being fire resistant. This new tubular frame is designed with the purpose of allowing the door leaf to be flush with the wall both in the opening direction and in the closing direction, and of also being installed with an extensible assembly capable of adjusting to the total width of the masonry wall and preventing thermal bridge.