Ma cranes okwera njanji (RMGs) ndi ma cranes apadera omwe amagwiritsidwa ntchito m'malo osungiramo ziwiya ndi mayadi apakati kuti agwire ndikusunga zotengera zotumizira. Amapangidwa kuti azigwira ntchito panjanji komanso amapereka luso loyendetsa bwino zotengera. Nazi zina mwazinthu zazikulu zama crane okwera njanji:
Ma Rail-Mounted Design: Ma RMG amayikidwa panjanji kapena njanji, kuwalola kuyenda m'njira yokhazikika mu terminal kapena pabwalo. Mapangidwe opangidwa ndi njanji amapereka bata ndi kuyenda kolondola kwa ntchito zonyamula ziwiya.
Span and Lifting Capacity: Ma RMG nthawi zambiri amakhala ndi utali wotalikirapo wokwanira kuphimba mizere ingapo ya chidebe ndipo amatha kunyamula makulidwe osiyanasiyana. Amapezeka m'njira zosiyanasiyana zonyamulira, kuyambira makumi khumi mpaka mazana a matani, kutengera zofunikira za terminal.
Kutalika Kwa Stacking: Ma RMG amatha kuyika zotengera molunjika kuti apititse patsogolo kugwiritsa ntchito malo omwe amapezeka mu terminal. Amatha kukweza zotengera pamalo okwera kwambiri, nthawi zambiri mpaka zotengera zisanu kapena zisanu ndi chimodzi m'mwamba, kutengera masanjidwe a crane ndi mphamvu yokweza.
Trolley ndi Spreader: Ma RMG ali ndi makina a trolley omwe amayendera pamtengo waukulu wa crane. Trolley imanyamula chowulutsira, chomwe chimagwiritsidwa ntchito kukweza ndi kutsitsa zotengera. Wofalitsa amatha kusinthidwa kuti agwirizane ndi kukula kwake ndi mitundu yosiyanasiyana.
Ma Container Terminals: Ma RMG amagwiritsidwa ntchito kwambiri m'malo osungiramo zinthu kuti agwire ndikusunga zotengera zotumizira. Amagwira ntchito yofunika kwambiri pakukweza ndi kutsitsa zotengera m'sitima, komanso kusamutsa zotengera pakati pa madera osiyanasiyana a terminal, monga mabwalo osungira, malo okweza magalimoto, ndi mphepete mwa njanji.
Mayadi a Intermodal: Ma RMG amagwiritsidwa ntchito m'mayadi apakati pomwe zotengera zimasamutsidwa pakati pamayendedwe osiyanasiyana, monga zombo, magalimoto, ndi masitima apamtunda. Amathandizira kugwira bwino ntchito kwa chidebe, kuwonetsetsa kusamutsidwa bwino komanso kukhathamiritsa koyenda kwa katundu.
Malo Onyamulira Sitima ya Sitima: Makolani okwera njanji amagwiritsidwa ntchito m'malo onyamula katundu wa njanji kuti azitha kunyamula zotengera ndi katundu wina wolemetsa pokweza ndi kutsitsa. Amathandizira kusamutsa bwino katundu pakati pa masitima apamtunda ndi magalimoto kapena malo osungira.
Zida Zamakampani: Ma RMG amapeza ntchito m'mafakitale osiyanasiyana komwe katundu wolemetsa amafunika kusunthidwa ndikuwunjika. Amagwiritsidwa ntchito popanga mbewu, malo osungiramo zinthu, ndi malo ogawa zinthu, zida, ndi zinthu zomalizidwa.
Kukula ndi Kukweza Madoko: Mukakulitsa kapena kukweza madoko omwe alipo, ma crane okwera njanji nthawi zambiri amayikidwa kuti awonjezere mphamvu yonyamula ziwiya ndikuwongolera magwiridwe antchito. Amathandizira kugwiritsa ntchito bwino malo omwe alipo ndikuwonjezera zokolola zonse za doko.
Kupanga ndi Umisiri: Njirayi imayamba ndi gawo la mapangidwe ndi uinjiniya, pomwe zofunikira zenizeni za crane yokwera njanji zimatsimikiziridwa. Izi zikuphatikiza zinthu monga kukweza mphamvu, kutalika, kutalika kwa stacking, zida zodzipangira okha, komanso malingaliro achitetezo. Mainjiniya amagwiritsa ntchito pulogalamu yothandizidwa ndi makompyuta (CAD) kupanga mitundu yatsatanetsatane ya 3D ya crane, kuphatikiza kapangidwe kake, makina a trolley, owulutsa, makina amagetsi, ndi njira zowongolera.
Kukonzekera ndi Kupanga Zinthu: Kapangidwe kameneka kakamalizidwa, ntchito yopangira zinthu imayamba ndi kukonza zinthu. Zigawo zazitsulo zamtengo wapatali ndi mbale zimagulidwa motsatira ndondomeko. Zitsulozo zimadulidwa, kuumbidwa, n’kuzipanga m’zigawo zosiyanasiyana, monga mizati, mizati, miyendo, ndi zomangira, pogwiritsa ntchito njira monga kudula, kuwotcherera, ndi makina. Kupangaku kumachitika motsatira miyezo yamakampani komanso njira zowongolera zinthu.
Msonkhano: Mu gawo la msonkhano, zida zopangidwira zimasonkhanitsidwa pamodzi kuti zipange mawonekedwe akuluakulu a gantry crane yokwera njanji. Izi zikuphatikizapo mtengo waukulu, miyendo, ndi zomangira zothandizira. Dongosolo la trolley, lomwe limaphatikizapo makina okweza, chimango cha trolley, ndi chofalitsa, chimasonkhanitsidwa ndikuphatikizidwa ndi kapangidwe kake. Makina amagetsi, monga zingwe zamagetsi, ma control panel, ma motors, masensa, ndi zida zotetezera, zimayikidwa ndikulumikizidwa kuti zitsimikizire kugwira ntchito moyenera ndi kuwongolera kwa crane.