What is the difference between Type-A and Type-B lines of semi-static ropes?

With semi-static ropes there is a difference between the Type-A and Type-B ropes.

The difference in Type-A and Type-B lines has to do with the quality/resistance.

A type A-line has a higher resistance and is therefore tested with a weight of 100KG, while a Type B-line is tested with a weight of 80KG.
Type-B safety lines are often cheaper in price but have a lower performance level than Type-A lines.
When using Type-B lines, more attention should be paid to signs of wear.

Below schematically the difference between the test results that Type A and B lines must meet as a minimum.

Static resistance2200kg minimum2200kg minimum
Static resistance with "double eight" knot1500kg (3 minutes)1200kg (3 minutes)
Minimum number of rope break traps
(interval 3 minutes)
5 x fall factor 1
(test weight 100kg)
5 x fall factor 1
(test weight 80kg)
Force / impact on body, carabiner and/or
anchorage (fall factor 0.3)
< 6kN
(test weight 100kg)
(test weight 80kg)
Elongation line (test weight between 50 & 150 kg)<-5%<-5%
Sheath shift20-50mm
(depending on diameter)
15mm maximum
Shrinkage rate in water*No limitNo limit

Source: http://www.beal-pro.com

*Before using a semi-static rope for the first time, it must be placed in a cold water immersion bath for 24 hours. This will cause the rope to shrink once and thus obtain its final length. Preferably, the rope is left on a roll during the dipping bath and also during drying.

See also: Information about rope: choice and maintenance

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