The dead end crosshead is fabricated from heavy mild steel plate ultrasonically tested to BS 4336. 4 plates are set horizontally to take the main thrust and 2 plates are sent vertically to take the eccentric couple from the anchor plate. Suspended from this assembly are machined MS guidplates to receive the individual sleeper anchor plates. The heavy suspension plates are arranged through a pin joint to ensure that the main thrust is in line on the crosshead.

The live end crosshead is fabricated from heavy mild steel plate ultrasonically tested to BS 4336. These plates are mounted in line and pinned by means of a clevis end to the jackhead upright and are supported on a trolley assembly at each end. This mounting is capable of adjustment to ensure alignment. This individual sleeper anchor plates are suspended from a fabricated steel plate tied back to the crosshead with 18 No. High tensile steel tension road to the trolley assembly.

The live ends upright are fabricated from heavy mild steel plate ultrasonically tested to BS 4336. They are symmetrically arranged either side of the crosshead centre line and the 300T jack centre lines. The jack body is fixed to the upright by clevis end and a pin assembly. The assembly is such that it can be removed to make other products and thus pivots about a centre heavy reaction plate with a kicker plate set low down in the end block to the pre-stressing bed.

The dead end uprights are similar to the live end except that as they do not contain any hydraulic jacks the upright width is reduced to allow 1 m clearance between adjacent upright for better access to the production line. The crosshead is bolted and welded to the upright for stability and to absorb the out of balance from the anchor plate suspension system.

The hydraulic jacks are double acting 300 ton capacity with a 900 mm stroke at working pressure of 600p.s.i. They are formed from forged mild steel, honed and hand chromium plated in the bores. The rams are threaded for the locking nut with a heavy duty square thread and fitted with oil seals and wear rings.