Kireni Yoyambira ya Girder Gantry

Chingwe Choyimitsa Mlatho Choyimitsa Mlatho chimagwira ntchito pa misewu ikuluikulu, milatho ya sitima kupita kumalo omangira mlatho, ntchito yake yayikulu ndikutchula chidutswa chabwino cha mtengo wokonzedwa kale komanso choperekedwa pa mapiri abwino okonzedwa kale. Ndipo tanthauzo lalikulu ndilakuti ma crane ali ndi zofunikira zazikulu zosiyana komanso zotetezeka kwambiri.
Chingwe Choyimitsa Mlatho Choyimitsa Mlatho Chinkakhala ndi mzati waukulu, choyimitsa mlatho, mzati wotsogolera pansi, miyendo yakutsogolo ndi yakumbuyo, chotulutsira chowonjezera, choyimitsa mzati wopachikika, choyimitsa mzati ndi makina a elecrto-hydraulic. Chimagwiritsidwa ntchito pa mipata itatu yosiyana yoyimitsa mzati umodzi, yokhala ndi mphamvu zambiri zogwirira ntchito.
Chigayo Choyimitsa Mlatho Choyimitsa Mlatho chimagwiritsidwa ntchito kwambiri pakupanga misewu ikuluikulu ndi njanji. Makinawa amagwiritsidwa ntchito poyimika magiya a konkriti kuti azitha kuyenda mofulumira kwambiri (250km, 350km) pa sitima yapamtunda. Makinawa ndi oyenera magiya ofanana kapena magiya osiyanasiyana omwe amatha kukhala 20m, 24m ndi 32m, 50m. Mbali yakumbuyo ili ndi zothandizira ziwiri. Chimodzi mwa zothandizira ndi "C" yokhala ndi ukadaulo wozungulira komanso wopindika. Ukadaulo wa "C" unasunga malo odutsa paulendo ndipo umathandiza kuyenda kudzera mu ngalande ndi galimoto yotumizira giya.