I-double girderphezuluama-craneszenzelwe ukuphakamisa ukuphatha izinto ezisindayo ezingaphezu kwamathani angama-20. Ngakho-ke, i-double girderphezuluama-cranes angabuye abizwe ngokuthi ama-cranes amabhuloho esindayo. Okhreni abaginqika kabili abangaphezulu bangaklanywa ngendlela ehlukahlukene yokucushwa kwe-crane egijima phezulu, okuhlanganisa izinqola zokuphakamisela phezulu kanye namawintshi avulekile, anezinhlobonhlobo zokunamathiselwe ku-crane ongaphezulu kanye namadivayisi okuphakamisa ngaphansi kwehhuku njengama-grabs, izindlawu, omagnet, okhreni, njll. amadivaysi anemishayo, izingwegwe ezimise okwe-C noma ezinye izindlela ezisetshenziselwa ukuphatha izinto ezinzima, ezinezici zokuphepha okuphezulu, ukuthembeka okuphezulu nokuqina.
Umthamo womthwalo uvame ukuba yisizathu esiyinhloko sokukhetha akabiliugongolo i-crane ephezulu. Ama-cranes ama-double girder overhead ayindleko nesikhala isixazululo sokulondoloza uma imithwalo engaphezu kwamathani ayi-15 idinga ukukhushulwa phakathi nomjikelezo womsebenzi oqhubekayo.
Ukuphakama kwehhuku okuthuthukisiwe. Kukabiliibhuloho le-beam ama-cranes afaka i-trolley ehamba phezu kwebhuloho, ngaleyo ndlela akhulise ukuphakama kwehhuku. Lokhu kuvumela opharetha ukuthi aphakamise izinto ezinde nezinde kanye nezinto zokwakha ngaphakathi kwendawo yokusebenza uma kuqhathaniswa ne-crane eyodwa yegirder ene-under.lengiswa i-trolley kanye ne-hoist.
Kukhona ama-hoist asizayo ku-beam ngayinye. Ama-cranes engeziwe angengezwa ku-girder eyodwa ukwengeza amaphuzu amaningi okuphakamisa ku-crane engaphezulu. Lama-cranes ayakwazi ukuzungezana ngoba awekho emgqeni owodwa.
Ngaphesheya kwamabanga amade.II-crane engaphezu kwamathani angama-20ingaphinda ihambe amabanga amade ngoba idizayini ye-parallel-girder inamandla amakhulu ewonke kunomklamo wegida elilodwa.
Ukusebenza okuqinile. Ukusebenza okuphezulu kakhulu ngenxa yedizayini ye-double girder yezivinini ezinde nezidlula zonke. Ikakhulukazi ukuphakama kokuphakama okuphezulu, njengoba ihuku lomthwalo lingaphakanyiswa phakathi kwamagida amabili e-crane.
LokhuI-crane engaphezu kwamathani angama-20izophatha kalula imithwalo esindayo nezisindo ezisinda ngisho nangaphezulu20 amathani. Akukhona lokhu kuphela, kusebenza kahle ngisho nangesivinini esiphezulu.Sine-double girder overhead cranes etholakala ngobukhulu obuhlukahlukene kanye nokucaciswa okuzohambisana nenhloso yakho ngokuphumelelayo nangempumelelo.
