Fall arrest Blocstop BSO

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An additional safety system in accordance with EN 1808 is mandatory in man riding applications. The system is used to secure the work basket or platform against falling.

That is precisely what our Blocstop does. They are small, light and compact and attached to the working platform where the safety rope runs through it.

BSO – Blocstop for the detection of overspeed:

If the movement of the safety rope exceeds a specified speed, then the BSO triggers automatically and securely catches the load. The safety rope is held between the clamping jaws, preventing the rope from slipping any further. However, the surface of the clamping jaws is large enough to prevent damage to the rope. The Blocstop BSO is designed in such a way that the clamping jaws grip tighter, the higher the load on the rope.

Furthermore, the Blocstop BSO has been tested using many times the nominal load in order to ensure an extremely large safety margin.

We are constantly working to improve our products. With the 2021 generation of BSO, we were able to reduce the shock factor in case of a fall.

BSA – Blocstop for the detection of inclination of the platform or slack of wire rope:


In contrast to the BSO, the BSA‘s clamping jaws are not triggered by excessive speed but rather by monitoring the suspension rope. The BSA is held open by a lever which is supported on the suspension rope by a roller. If the suspension rope breaks then this support stops and the BSA closes.


In precisely the same way as the BSO, the clamping jaws clamp the safety rope and prevent the load or the platform from falling.


On platforms with two suspension points, arranging the suspension and safety ropes in parallel enables the system to monitor the tilt of the platform. If one side of the platform descends then the BSA closes on the lower side, catching the platform before the tilt reaches a critical angle.

Model Name Forward Speed (m/min) Wire Rope Diameter (mm) WLL manriding Description Product Code Price
BSO 500 P 30 8 600 291569
BSO 500E P 30 8 600

with limit switch and 2m cable fitted with plug for tirak connection

291579
BSO 520 P 30 9 600 291589
BSO 520E P 30 9 600

with limit switch and 2m cable fitted with plug for tirak connection

291599
Model Name Forward Speed (m/min) Wire Rope Diameter (mm) WLL manriding Description Product Code Price
BSO 1020 P 30 9 800 291609
BSO 1020EFA P 30 9 800

with remote triggering of the BSO

291629
BSO 1030 P 30 10 1000 291639
BSO 1030E P 30 10 1000

with limit switch and 2m cable fitted with plug for tirak connection

291649
BSO 1030EFA P 30 10 1000

with remote triggering of the BSO

291659
BSO 1040 P 30 11 1200 291669
BSO 1040E P 30 11 1200

with limit switch and 2m cable fitted with plug for tirak connection

291679
BSO 1040EFA P 30 11 1200

with remote triggering of the BSO

291689
Model Name Forward Speed (m/min) Wire Rope Diameter (mm) WLL manriding Description Product Code Price
BSO 2050 P 30 14 2000 291699
BSO 2050E P 30 14 2000

with limit switch and 2m cable fitted with plug for tirak connection

291709
BSO 2050EFA P 30 14 2000

with remote triggering of the BSO

291719
BSO 2460 P 30 16 2400 291789
BSO 2460E P 30 16 2400

with limit switch and 2m cable fitted with plug for tirak connection

291799
BSO 2460E P 30 16 2400

with limit switch and 2m cable fitted with cable gland for tirak connection

296489
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