The reaction beams, fixed the concrete anchoring blocks, are used to bear the load of the stressing wires.

Depending on the type of the element to be produced reaction beams of 150t – 200t – 300t – 400t and 500t are available.

Each pair consists of a tensioning beam at one of the bed and a detensioning beam at the other end of the bed. The detensioning beam also includes a movable anchor for steel wire releasing before cutting.