Bailey Choj yog tus choj txuas ceev uas tsim los ntawm Txoj Kev Npaj Txoj Kev Loj thiab Tsim Lub Tsev Haujlwm ntawm Ministry of Communications raws li tus thawj British-ua Bailey Steel Truss Choj.Nws yog ib tug decomposable thiab ceev-erecting txheem choj.High-strength steel yog tag nrho welded.Lub ntsiab beam yog lub teeb decomposable truss.Lub truss yog txuas nrog ib tus pin.Cov khoom sib hloov pauv tau thiab lub teeb hauv qhov hnyav.Nws yog ib qho yooj yim rau kev thauj thiab disassemble.Nws kuj tuaj yeem sib sau ua ke raws li qhov yuav tsum tau ua ntawm kev ncua thiab thauj khoom.Hom kev sib dhos steel choj yog ib qho kev npaj zoo thiab kev thauj mus los thaum muaj xwm txheej ceev txhawb nqa steel choj.Muaj feem xyuam rau 5 hom kev thauj khoom xws li tsheb-10, tsheb-15, tsheb-20, crawler-50, thiab trailer-80.