Pawiri girderpamwambacranesadapangidwa kuti anyamule kunyamula katundu wolemetsa wopitilira matani 20. Choncho, pawiri girderpamwambama cranes amathanso kutchedwa heavy-duty bridge cranes. Ma crane okwera pawiri amatha kupangidwa m'njira zosiyanasiyana zotsogola zapamwamba, kuphatikiza ma trolleys ndi ma winchi otseguka, okhala ndi zomata zamitundu yambiri zam'mwamba ndi zida zonyamulira pansi pa mbedza monga ma grabs, tongs, maginito, ma cranes, ndi zina. zipangizo zokhala ndi matabwa, mbedza zooneka ngati C kapena njira zina zomwe zimagwiritsidwa ntchito poyendetsa zinthu zolemera, zomwe zimakhala ndi chitetezo chapamwamba, kudalirika kwakukulu komanso kukhazikika.
Katundu amatha nthawi zambiri chifukwa chachikulu chosankha akawirimtengo crane pamwamba. Ma cranes okwera pawiri ndi mtengo komanso malo njira yopulumutsira ngati katundu wopitilira matani 15 akufunika kukwezedwa mkati mwa ntchito yokhazikika.
Kutalika kwa mbedza. Pawirimlatho wamtengo ma cranes amakhala ndi trolley yomwe imayenda pamwamba pa mlatho, motero imakulitsa kutalika kwa mbedza. Izi zimathandiza woyendetsa kukweza zinthu zazitali komanso zazitali ndi zida mkati mwa malo ogwirira ntchito poyerekeza ndi crane imodzi yokhala ndi pansi.adapachika trolley ndi hoist.
Pa mtengo uliwonse pali zowonjezera zowonjezera. Ma crane owonjezera amatha kuwonjezeredwa ku girder imodzi kuti muwonjezere malo okweza angapo ku crane yakumtunda. Makolawa amatha kuzungulirana chifukwa sali pamtengo womwewo.
Kudutsa mtunda wautali.The20 matani pamwamba pa craneimathanso kuyenda mtunda wautali chifukwa mapangidwe a parallel-girder ali ndi mphamvu zambiri kuposa kapangidwe ka gulu limodzi.
Kuchita mwamphamvu. Kuchita kwapamwamba makamaka chifukwa cha mapangidwe awiri-girder amathamanga atali komanso odutsa. Makamaka kutalika kokweza kwambiri, chifukwa mbedza yonyamula katundu imatha kukwezedwa pakati pa ma girders awiri a crane.
Izi20 matani pamwamba pa craneadzanyamula katundu wolemera mosavuta komanso wolemera kuposa20 matani. Osati izi zokha, zimagwira ntchito bwino ngakhale pa liwiro lapamwamba.Tili ndi ma cranes apawiri a girder pamwamba omwe amapezeka mumitundu yosiyanasiyana ndi mafotokozedwe omwe angagwirizane ndi cholinga chanu mogwira mtima komanso mogwira mtima.
