THE PIVOTING SYSTEM, USES THE DOOR'S AXLE FOR ITS TURN, WITH THAT PART OF THE DOOR IS INSIDE THE ENVIRONMENT AND PART IS OUTSIDE THE ENVIRONMENT. DUE TO ALL WEIGHT OF THE DOORT TO BE IN THE PIVOT, WE CAN REACH GREAT DIMENSIONS WITHOUT ANY LOSS OF STABILITY IN THE DOOR TURN. FOR DOORS WITH MEASUREMENTS GREATER THAT 2.0 MTS., WE USE THE RULE OF 20% TO 30% OF THE WIDTH FOR THE AXIS OF THE PIVOTING SYSTEM.