7 and 8 strand ropes : applications in ropeways - OITAF
7 and 8 strand ropes : applications in ropeways - OITAF
7 and 8 strand ropes : applications in ropeways - OITAF
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Rope dynamic prestretch<strong>in</strong>g<br />
The scope is to reduce the elongation of the rope when loaded.<br />
Know<strong>in</strong>g that the splice area is the most critical part of the rope, the absolute<br />
value of the rope elongation should be selected to allow one additional rope<br />
splice (The tucks of a rope with no elongation at all, can not be relocated).<br />
This process consists of load<strong>in</strong>g <strong>and</strong> bend<strong>in</strong>g the rope dur<strong>in</strong>g its manufacture<br />
over a double traction w<strong>in</strong>ch (the first half of the mach<strong>in</strong>e <strong>in</strong>creases the load<br />
to the rope, the second half lowers the load).<br />
The tension applied at the rope can be adjusted, us<strong>in</strong>g a hydraulic driven<br />
sheave, up to 80 tons.<br />
The pre-stretch<strong>in</strong>g mach<strong>in</strong>e, which is about 90 m long, <strong>in</strong>creases the time<br />
dur<strong>in</strong>g which the rope is under tension, improv<strong>in</strong>g the effect of the prestretch<strong>in</strong>g.
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