The2 girder pamwamba cranendi zida zonyamulira zolemetsa zomwe zimagwiritsidwa ntchito kwambiri popanga mafakitale, zopangidwira kwambiri, zomwe zimagwiritsidwa ntchito pafupipafupi. Imathandizidwa ndi mizati ikuluikulu iwiri ndipo imatha kunyamula kulemera kwakukulu.
The2 girder pamwamba craneili ndi mphamvu yonyamula katundu ndipo nthawi zambiri imatha kunyamula zinthu zoyambira matani 10 mpaka matani 500 ndi kupitilira apo. Izi zimapangitsa kukhala chisankho chabwino kwa zida zolemetsa komanso kuwongolera zinthu zazikulu popanga mafakitale. Poyerekeza ndi ma cranes apamwamba amtundu umodzi, ma cranes awiri-girder amatha kuthandizira mipata yayikulu komanso kukwera kokwera, kutengera malo osiyanasiyana ogwirira ntchito.
Pawiri mpandaot Kapangidwe ka crane kaŵirikaŵiri kumapereka kukhazikika kwapamwamba, makamaka pokweza zinthu zolemera kwambiri kapena zosaoneka bwino. Panthawi imodzimodziyo, imakhala ndi njira yoyendetsera bwino kwambiri yomwe imatha kukwaniritsa ntchito yeniyeni ya crane kuti iwonetsetse kugwiritsira ntchito bwino komanso kotetezeka.
Mapangidwe apawiri girderot cranezitha kusinthidwa malinga ndi zofunikira za ntchito, kuphatikiza kutalika kokweza, kutalika, kuchuluka kwa katundu ndi njira yoyenda. Ogwiritsa ntchito amatha kusankha kasinthidwe koyenera kwambiri malinga ndi momwe zilili pa malo awo antchito, kuti apititse patsogolo kupanga bwino.
Double girder Bridge Cranenthawi zambiri imakhala ndi zinthu zosiyanasiyana zotetezera, monga chitetezo chochulukirachulukira, anti-collision system ndi chipangizo choyimitsa mwadzidzidzi. Zida zotetezerazi zimatha kuchepetsa zoopsa zogwirira ntchito ndikuwonetsetsa chitetezo cha ogwira ntchito ndi zida. Mlatho wa Double girder Crane umayikidwa pamwamba pa msonkhano kapena nyumba ya fakitale, yomwe sikhala ndi malo apansi, kuwongolera kwambiri kuchuluka kwa malo ogwirira ntchito a msonkhanowo. Kapangidwe kameneka kamapangitsa kukhala koyenera makamaka kwa malo ogwira ntchito omwe amafunikira malo akuluakulu apansi.
Crane yapawiri yokwera pamwambaimatha kukwaniritsa zosowa za malo osiyanasiyana ogwira ntchito ndikupatsa mabizinesi njira zoyendetsera bwino komanso zotetezeka pogwiritsa ntchito mapangidwe makonda. Ndi kukula kosalekeza kwa kufunikira kwa mafakitale, ma cranes a Double girder Bridge apitiliza kuchita gawo lalikulu mtsogolomo kuti alimbikitse zokolola m'mafakitale osiyanasiyana.
