A node of portals allowing the building supported prevented from collapsing ETD ' be reusable after earthquake. The node comprises seals (1) whereof the armature is formed by cables passing over pulleys (2) (8) axis. Each cable forms a continuous belt (3) and is closed on itself in a housing (4) latching the clamping of the belt (3) and the damping of the voltage peaks of the cable. The crane of the invention, in addition to human lives, is particularly for saving the real estate. Page 08/01/03 11 : 17 : 09 : 1