Famagosta – Abbiategrasso extension
In Milan, the APT-BF systems were installed directly on the concrete slab. In the considered curve, the maximum axle load was estimated to be 40 kN.
The base plate pad was developed to have a thickness of 50 mm and a vertical static stiffness of 5 kN/mm. Two compression springs with a spring rate of 6 kN/mm are compressed 2 mm to produce a pre-load of 24 kN, resulting in a resilient fastener with limited displacements.