Enwere ike ịnye cranes na-agba ọsọ okpukpu abụọ na klaasị A, B, C, D, na E nke CMAA, nwere ikike nke nwere tọn 500 na ogologo ruo 200 ụkwụ ma ọ bụ karịa. Mgbe emebere ya nke ọma, crane akwa akwa nwere okpukpu abụọ nwere ike ịbụ ezigbo ngwọta maka ụlọ ọrụ chọrọ cranes dị arọ na nke ọkara, ma ọ bụ akụrụngwa nwere oke isi na/ma ọ bụ oghere ala. Nhazi osisi nwere ike ịbụ nhọrọ dị ọnụ ala maka kreenu dị arọ na ụlọ nrụpụta, ụlọ nkwakọba ihe, ma ọ bụ mgbakọ. Igwe kreenu nke chọrọ ikike dị elu, obosara obosara, ma ọ bụ elu elu ga-erite uru site na imewe ihe eji agba okpukpu abụọ, mana ọ nwere ike na-eri karịa n'ihu.
Crane akwa akwa okpukpu abụọ na-achọkarị nwechapụ dị elu n'elu ọkwa ọkwa cranes, ka gwongworo ndị na-ebuli elu na-agafe n'elu ihe ndị dị na cranes. Ndị na-eke akwa akwa na-aga n'elu okporo ụzọ kreenu ndị a na-agbanye n'elu okporo ụzọ kreen. gwongworo ngwụcha - Ịkwado akwa akwa na-enye ya ohere ịnya ụgbọ okporo ígwè crane, nke na-enye ohere ka crane na-aga elu na ala n'okporo ụzọ kreenu. Akwa Girder – Ọkpụkpụ kwụ n'ahịrị na kreenu na-akwado eriri igwe na ebuli.
Akụkụ bụ isi nke ụlọ ahịa crane nwere oghere abụọ na-azụ ahịa bụ, gwongworo na-agba n'okporo ụzọ na-agbatị ogologo usoro egwu, yana akwa-ịgba-girder nke edobere na gwongworo ngwụcha, ebe ụgbọ ala maka ebuli na-akwụsịtụ ibuli elu wee gafee. akwa mmiri. Ihe mejupụtara cranes nke nwere akwa okpukpu abụọ bụ akwa mmiri abụọ jikọtara n'okporo ụzọ ụgbọ elu, nke a na-enyekarị ya na eriri waya na-arụ ọrụ eletrik n'elu, mana enwere ike ịnye ya n'elu igwe ejiri ọkụ eletrik dabere na ngwa a. SVENCRANE Overhead Cranes na Hoists nwere ike ịnye cranes dị mfe otu girder maka ojiji n'ozuzu ya, ma na-enyekwa cranes ejiri rụọ akwa akwa okpukpu abụọ maka ụlọ ọrụ dị iche iche. N'ihi na swivels nwere ike ịnọdụ ala n'etiti ma ọ bụ n'elu oghere ndị na-agafe agafe, 18-36 ọzọ nke ịdị elu swivel dị mgbe ị na-eji crane okpukpu abụọ.