Guhitamo uburenganzira umunara ni ngombwa kubikorwa byose byubaka. Aka gatabo gatanga incamake yuzuye yibyiza umunara irahari, urebye ibintu nkubushobozi bwo guterura, uburebure, kugera, nibiranga. Tuzashakisha ubwoko butandukanye, ibirango, nibisobanuro kugirango tugufashe gufata icyemezo cyuzuye.
Hejuru umunara barangwa nuburyo buzunguruka hejuru yumunara uhagaze. Zitanga uburyo bwiza kandi bukwiye kubikorwa byinshi byubwubatsi. Icyitegererezo kizwi cyane kirata ubushobozi butangaje bwo guterura no kugera, bigatuma biba byiza kubwinyubako ndende n'imishinga minini y'ibikorwa remezo. Reba ibintu nkubushobozi bukenewe bwo guterura (bupimirwa muri toni) hamwe na jib ntarengwa igera (yapimwe muri metero) mugihe uhitamo crane yo hejuru.
Nyundo umunara ni ubwoko bwa crane yo hejuru-izwiho kuba itandukanye ya jib ya horizontal, isa n'inyundo. Igishushanyo gitanga imbaraga zihamye hamwe nubushobozi bwo guterura ugereranije nibindi bihinduka hejuru. Iyi crane akenshi itoneshwa kubikorwa byo guterura ibintu biremereye kubibanza binini byubaka. Bakunze kugaragara kumishinga yo kubaka ndende cyangwa aho ibikoresho binini kandi biremereye bigomba kuzamurwa.
Hejuru umunara gira uburyo bwo guswera hejuru yumunara, bikavamo uburebure buri hasi ugereranije na kran gakondo yo hejuru. Ibi biborohereza gutwara no guterana. Igishushanyo mbonera cyabo kibatera gukora imishinga ifite icyumba gito. Kugabanya uburebure kandi bivuze ko akenshi byoroshye kwinjiza mumyubakire igoye yo kubaka imijyi.
Luffing jib umunara Ikiranga jib ishobora guhindura inguni, ikemerera guhinduka kwinshi mugushira no kugera. Iyi mikorere ituma bikwiranye cyane cyane nakazi gakomeye aho imyanya ihamye ari ngombwa. Ubushobozi bwo guhindura inguni ya jib itanga uburyo bwiza bwo kugera no gukora neza. Ibi biragenda bikundwa cyane kubikorwa byabo mumishinga itandukanye yo kubaka.
Guhitamo icyiza umunara bisaba gusuzuma witonze ibintu byinshi byingenzi:
Abakora ibicuruzwa byinshi bayobora batanga ubuziranenge umunara. Bimwe mubyamamare harimo Liebherr, Potain, Terex, na Zoomlion. Buri ruganda rutanga urugero rwicyitegererezo gikenera imishinga itandukanye. Gukora ubushakashatsi kubisobanuro no gusuzuma kuri buri kirango birasabwa cyane mbere yo kugura.
| Icyitegererezo | Uruganda | Ubushobozi bwo Kuzamura (toni) | Icyiza. Jib Kugera (m) | Icyiza. Uburebure (m) |
|---|---|---|---|---|
| Urugero Icyitegererezo A. | Liebherr | 16 | 60 | 80 |
| Urugero Icyitegererezo B. | Potain | 12 | 50 | 70 |
| Urugero Icyitegererezo C. | Terex | 20 | 75 | 90 |
Icyitonderwa: Imbonerahamwe yavuzwe haruguru itanga urugero rwamakuru. Ibisobanuro nyabyo biratandukanye bitewe nurugero rwihariye n'iboneza. Buri gihe ujye kurubuga rwabakora amakuru yamakuru agezweho.
Kubindi bisobanuro kubikoresho biremereye hamwe nababitanga byizewe, sura Suizhou Haicang Kugurisha Imodoka Co, LTD.