Great-length frogs for very high speed traffic railway tracks

摘要

This crossing frog of very great length (for example 28 meter giving a frog angle of tg. 0.0145) for very high speed traffic railway tracks is characterized in that the various fixed and movable members constituting same are housed inside a rigid cradle consisting of several sections assembled in end to end relationship and having a U-shaped cross-sectional contour with the cavity directed upwards and convergent lateral walls, the bottom of said cradle, constituting the frog base, being flat.