Hoʻokumu maoli ʻia ka crane gantry mobile me nā ʻāpana ʻelua, nā mīkini huakaʻi, nā mea hoʻokiʻekiʻe, a me nā ʻāpana uila. ʻO ka hiki ke hoʻokiʻekiʻe ʻia o ka puʻu gantry mobile he mau haneli mau tona, no laila, he ʻano hoʻi kēia o ka crane hana kaumaha. Aia kekahi ʻano ʻano o ka puʻu gantry mobile, ʻo European-type double-girder gantry cranes. Ua apono ia i ka manaʻo o ke kaumaha māmā, ke kaomi haʻahaʻa ma nā huila, kahi wahi liʻiliʻi liʻiliʻi, ka hana hilinaʻi, a me kahi hale paʻa.
Hoʻohana pinepine ʻia ʻo gantry crane ma nā mines, nā wili hao a me nā kila, nā pā alanui kaʻaahi, a me nā awa moana. Loaʻa iā ia ka pōmaikaʻi mai ka hoʻolālā ʻelua-girder me nā mana kiʻekiʻe, ʻoi aku ka nui, a i ʻole nā kiʻekiʻe kiʻekiʻe. Pono maʻamau ka ʻae ʻia ʻana o nā puʻu ʻelua ma luna o ke kiʻekiʻe o ke kaola, ʻoiai e hele ana nā kaʻa hāpai ma luna o nā apo ma ke alahaka cranes. No ka mea, hoʻokahi wale nō kaola holo kaʻa kaʻa kaʻa, ʻoi aku ka haʻahaʻa o ke kaumaha make o kēia mau ʻōnaehana, ʻo ia hoʻi, hiki iā lākou ke hoʻohana i nā ʻōnaehana holo māmā-kaumaha a hoʻopili i nā hale e kākoʻo nei i nā hale, ʻaʻole hiki ke hana i nā hana kaumaha e like me ka lua girder mobile gantry crane.
He kūpono nō hoʻi nā ʻano o ka ʻeke gantry crane no ke kūkulu ʻana i nā poloka mūmū, nā apo kila kila kaumaha loa, a me ka hoʻouka ʻana i nā lāʻau. Loaʻa ka crane gantry ʻelua i nā ʻano ʻelua, He ʻano a me ke ʻano U, a ua hoʻolako ʻia me kahi hana hoʻokiʻekiʻe i kūkulu ʻia, maʻamau a i ʻole ka hoist wehe a i ʻole winch.
Hiki ke hoʻolako ʻia ka crane gantry pālua-girder i nā hana hana like ʻole, nona nā mana helu e pili ana i nā koi o nā mea kūʻai aku. ʻO mākou ʻo SEVENCRANE nā mea ʻenekinia a kūkulu i nā hoʻonā maʻamau e pili ana mai nā cranes waiwai, māmā a hiki i nā cyclops kiʻekiʻe, hana kaumaha, welded girder-boxed cyclops.