Heavy-lift derricks often have capacities of up to 120 tons, or even up to 350 tons on some specialised heavy-lift vessels.
Izilenge ezinzima zokuphakamisa oko zinamandla asuka kwikhulu elinamashumi amabini eetoni, okanye ukuya kumakhulu mathathu anamashumi mahlanu eetoni kwiincitshe ezinzima zeengqayi eziphakamisayo.