The way the crane is reeved affects the lifting capacity of the tower crane for lifts outside the cranes tipping point. At and beyond the cranes tipping point generally the reeving does not increase lift capacity.
On this small Jaso tower crane when changing the reeving from 2 part to 4 part the lift capacity goes from 2.5 tonne to 5.0 tonne, a big difference. The downside to working with more reeving is that it reduces the hoist speed as there is more cable to lift, also more reeving can reduce lifting capacity as the crane also has to lift more cable, this is particularly the case on medium and high rise as there is a lot more cable to lift by increasing reeving.
Changing the reeving can be done on some cranes without touching the hook block, as the block locks into the trolly and changes the crane from 2 - 4 part.
On this crane the reeving must be changed manually, it is a pretty simple process
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