Serie E-TA SK-C

The load-bearing structure is two lateral, self-supporting, 16 mm thick trusses made up of modular elements. These elements (80/10 iron plates) are cross shaped. They are assembled with horizontally placed through screws at the ends of the four arms, which give the reticular structure its static conditions. Special interchangeable modules placed at the beginning and end of the flight have not only the static function of closing the “grating”, but also allowing the staircase to be adapted to the most varied design conditions, such as: starting from ground and from landing, or ending with a tread-connector. The modules are cut by laser and assembled with hexagonal, countersunk, flathead screws housed in special discs and convex nuts exclusive to Edilco. Special turned bushes in iron are used on one side as “nuts” for the above-mentioned structural screws and on the other side as special bases to sustain the various types of step. Spacer rings of various diameter and thickness are used to align the constituent elements of the staircase. The flights are attached at beginning and end with steel anchors using special supports fixed to the structures. The Spiral Staircases without cental pillar are made with modules that are “elongated” on the external wing and shortened on the internal fulcrum; appropriate positioning of the modules with respect to the two horizontal arms allow the desired circular shape to be obtained in clockwise or anticlockwise direction and in any fraction of 360 degrees. The Mixed Staircases are made with straight and spiral staircase modules. The connection between the straight/spiral flight and vice versa is made with special connecting modules.