Precast girder formwork ili ndi maubwino apamwamba kwambiri, mawonekedwe osavuta, obwereza, osavuta kuwongolera komanso osavuta. Iwo akhoza kukwezedwa kapena kukokera ku kuponya malo integrally, ndi demoulded integrally kapena piecemeal pambuyo konkire kukwaniritsa mphamvu, ndiye kukokera kunja nkhungu wamkati kuchokera girder. Ndiwothandiza kukhazikitsa ndi kukonza zolakwika, kutsika kwachangu, komanso kothandiza kwambiri.
The viaduct mlatho agawidwa m'magawo ang'onoang'ono, amene prefabricated mu zabwino ulamuliro kuponyera bwalo, ndiye, anapereka kukhazikitsa ndi zida zabwino erection.