Wayss & Freytag Aktiengesellschaft

Rail.one Gmbh

Db Netz Ag

Frithjof Schimpff

Rolf Knodel

Thomas Zander

Wolfgang Bergenthal

Hans-Dieter MÜLLER

A switch cross tie is made in a mold having a base plate formed with a plurality of holes in a predetermined pattern corresponding to a particular type of concrete switch cross tie by first overlying the entire base plate of a mold with a covering sheet provided with markings in a pattern corresponding to that of the holes needed for another particular type of concrete cross ties. This covering sheet overlies and blocks all the holes formed in the base plate and it is fixed in place atop the base plate. Then the operator or a computer-guided drill press cuts through the covering sheet and into the base plate at each of the markings to form thereat a respective new hole. Each such new hole is fitted with an anchor, and the mold is filled with concrete over and around the anchors with the covering sheet blocking all the holes other than the new holes. It is important that the covering sheet be sufficiently strong to inhibit entry of concrete through it into any of the holes other than the new holes. The concrete is allowed to cure or set and then the set concrete and the anchors are removed from the mold as a tie with anchors imbedded in it at locations corresponding to the new holes.

Method of making concrete switch cross ties

A prestressed concrete beam is made by first fitting the opposite ends of a group of reinforcing rods through respective holes in a pair of longitudinally spaced end plates having longitudinally confronting inner faces and opposite outer faces, then providing on each of the rods a head bearing longitudinally inward on the respective outer face, and then applying opposite outward traction to the end plates to tension the rods and filling around the rods and between the inner faces of the plates with a mass of concrete. The concrete mass is then cured and the traction on the end plates is released. Subsequently the heads of the rods are released from the plates and the plates are removed from the ends of the mass of cured concrete. The heads can be machined or burnt off, or the plate can be constructed to release them.

Making a prestressed concrete beam

Method of fastening construction components in a casing for

Process for the production of concrete switch cross ties

Concrete mold with arrangement for mounting tubular components

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Wiesbaden, Germany

Frithjof Schimpff