Prestressed concrete railway points sleeper - has sleeve sockets forming vertical cut=outs for screw which secures ribbed slab

摘要

Cutouts (2), positioned passing through vertically, are formed by tubular sleeve sockets (3), with templates, in a sleeper (1), made of prestressed concrete, under railway junction points. The cutouts provide accommodation for the screw (4) for fixing the ribbed slab (5).%. A nut (6) can be concreted in, on the bottom end of the socket, so that it is held firm enough for turning the screw, but can be easily pushed out downwards and replaced by a new nut. A sleeve-shaped element (7), enclosing the nut over half its height, may be built in on the underside of the sleeper, closing the cutout.