Na mgbakwunye na ebumnuche izugbe otu-girder gantry cranes akọwara n'elu, SEVENCRANE na-emepụta ma na-ewukwa cranes dị iche iche nke otu beam mobile maka ngwa ụlọ ọrụ dị iche iche, gụnyere otu-beam hydraulic roba-tyre na eletriki gantry cranes. A na-ejikarị cranes otu girder gantry na-egwuputa ihe, n'ichepụta n'ozuzu, ihe a na-emepụta ihe, ihe owuwu, yana ebe a na-ebunye ihe n'èzí na ụlọ nkwakọba ihe iji na-arụ ọrụ ibu ibu. Otu-girder gantry crane n'ozuzu a na-ewere dị ka dị fechaa ụdị gantry kreenu n'ihi imewe nke ihe owuwu na nanị otu doo, ọ na-ọtụtụ ebe na-ikuku ebe dị ka ihe yards, ogbako, nkwakọba ihe maka loading na ibutu ihe.
Single-girder gantry crane bụ ihe nkịtị kreenu e mere maka izugbe ihe njikwa, na-ejikarị na n'èzí saịtị, nkwakọba ihe, ọdụ ụgbọ mmiri, konkiri ọrụ, simenti ọkpọkọ industries, oghe yards, akpa nchekwa depot, na shipyards, wdg Otú ọ dị, ọ na-amachibidoro si ijikwa igwe na-agbaze, ihe ọkụ ọkụ ma ọ bụ ihe mgbawa. Ụdị igbe otu-girder gantry crane bụ ọkara-size, track-ije kreenu, nke a na-akwadokarị ya na ọkọlọtọ HDMD eletrọnịkị dị ka onye na-ebuli elu, ya na igwe eletrịkị na-agafe n'elu ala I-steel nke isi girder, nke sitere na efere ígwè. , nke a na-esi na efere ígwè, dị ka C-steel, na mkpuchi mkpuchi, na I-steel. Ọzọkwa, otu girder cranes na ọdabara na ma n'ime ma n'èzí ebe, dị ka ogbako, ụlọ nkwakọba ihe, ebe a na-adọba ụgbọala, ụlọ saịtị, na ọdụ ụgbọ mmiri, wdg Ọzọkwa, n'ihi na gị echiche, roba-taya na okporo ígwè-ndokwasa gantry. Ọ bụrụ na ị nwere ihe ndị ọzọ pụrụ iche chọrọ gbasara otu cranes anyị otu girder gantry span, loading ike, ma ọ bụ ibuli elu, ị nwere ike ịgwa Acrane banyere ha, anyị ga-ahaziri gị ha. Igwe elu gantry anyị na-arụ ọrụ nke ọma ma na-adịte aka n'ihi na anyị na-enyocha ịdịmma kreenụ nke ọma ma na-eji akụkụ ndị kachasị mma na-eguzogide iyi. Kreenị dị elu nke otu girder nwere ọkọlọtọ nwere ibu swivel kacha dị mfe nke ụlọ ọrụ, yana jakị ọnụ ụlọ dị ala nke nwere draịva na-agbanwe agbanwe na ma hoist na swivel. Ebe ọ bụ na cranes otu-girder chọrọ naanị otu ogwe nkwado, usoro ndị a na-enwekarị ibu nwụrụ anwụ dị ala, nke pụtara na ha nwere ike iji usoro egwu dị mfe ma jikọọ na ụlọ nkwado dị adị.
Mgbe emebere ya nke ọma, ha nwere ike ịbawanye ọrụ kwa ụbọchị ma bụrụ ihe ngwọta zuru oke maka akụrụngwa na arụmọrụ nwere oke ala ala na n'elu nke chọrọ kreenu ọkụ na-arụ ọrụ nke ọma. A na-ejikwa cranes trestle okpukpu abụọ na-eme ihe n'ime ma ọ bụ n'èzí, ma ọ bụ na àkwà mmiri ma ọ bụ na nhazi gantry, ma a na-ejikarị eme ihe n'ebe a na-egwupụta akụ, igwe igwe na ígwè, ogige ụgbọ okporo ígwè, na ọdụ ụgbọ mmiri. Akwa cranes na-abịa na nhazi dị iche iche, ọ pụkwara inwe ma ọ bụ otu ma ọ bụ abụọ - nke a na-akpọkarị otu-girder ma ọ bụ nhazi okpukpu abụọ. N'adịghị ka crane nke nwere otu girder n'elu, a na-eji ụkwụ na-akwado isi ya, na-eme ka ọ dị ka nhazi nke gantry.