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Crane Safety Features

Slow Down Limits

We can mount and install long travel slow down spider limit switches 2000mm from the end of the runway crane rail that would prevent the overhead crane from banging into the end stops at full speed. You would need one spider limit on each end of the runway beams.

We can also fit cross travel slow down spider limits 1000mm from each end of the crane girder to prevent the hoist unit from being able to run into the cross travel end stops at full speed. If you wanting to prevent your cranes from colliding with each other then you would need our ‘anti-collision sensors’.


Anti-Collision and Distance Provisions

Overhead travelling cranes and goliath gantry cranes can be fitted with crane anti-collision sensors and end stop anti-collision sensors. This would automatically slow the crane into creep speed approximately two metres before colliding with either another crane or the track end stops.

When used as ‘runway end stop anti-collision’ or ‘hoist cross travel end stop anti-collision’ then anti-collision sensors are essentially the same as ‘slow down spider limits’, only anti-collision sensors have more adjustability once installed. If you wanted the sensors to respond to both sides of the crane then sensors would need fitting on both sides of the crane.


Limit Switches

The safety features of the hoist will include emergency hoist limit switches for highest and lowest hook positions. Additional safety features must be requested prior to order.


Load Limiters

All our brand new cranes come with calibrated safe working load limiter devices.


Load Summation for Tandem Lift Cranes

For tandem lift cranes where the crane needs 2x hoists that can also have a maximum safe working load of the crane (for when using hoists on their own and not in tandem) we can fit ‘simultaneous tandem lift load limiters’, also known as ‘load summation‘, built into a control panel. These additional safety features means the 2x hoist units won’t be able to lift more than the designated safe working load tonnage of the crane when both hoist are in use.

For example without load summation on a 10 tonne overhead crane with 2x 10 tonne hoists means the crane can technically lift 20 tonnes when both hoists are in use, however the crane girders are made for 10 tonnes SWL. Load summation also means that the hoist units ‘talk to to each other’ through our sophisticated continuous load monitoring control panel technology, in the event of an overload situation, which is essential when tandem lifting objects that are heavier on one side.

For example if tandem lifting a 10,000kg item that is heavier on one side it means that one hoist unit may have 6,500kg on it, where the other has 3,500kg on it. This is why we regularly build cranes that have 2x hoist units that are the total safe working load of the crane ie. 10,000kg SWL crane with 2x 10,000kg SWL hoist units. Load summation means the cranes can be used safely and properly.


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