The rig of a derrick varies considerably in detail according to the purpose for which it is provided, the weight it is designed to hoist, and the position in which it is fitted.
Ukuxhotyiswa kwesilenge kuyohluka kwiinkcukacha ngokweenjongo ezithi zinikezelwe, ubunzima ebuyilelweyo ukuba ibuthwale, kunye nendawo apho ifakelwe khona.