Lub crossmember, ib qho kev tivthaiv uas txuas qhov sib txawv ntawm lub hauv ntej thiab nram qab seem ntawm lub tsheb, ua lub luag haujlwm tseem ceeb hauv kev tswj xyuas kev ncaj ncees ntawm lub tsheb lub cev thaum muaj kev sib tsoo. Nws cov qauv tsim thiab kev ua tau zoo muaj qhov cuam tshuam loj rau kev sib tsoo ntawm lub tsheb, qhov tseem ceeb hauv kev ua kom muaj kev nyab xeeb ntawm cov neeg caij tsheb thiab cov neeg nyob.
Nyob rau hauv ib qho xwm txheej sib tsoo, tus crossmember ua raws li cov tswv cuab ntawm cov khoom thauj, faib thiab tiv thaiv cov kev cuam tshuam cov quab yuam uas tau tawm ntawm lub tsheb. Nws lub peev xwm los tswj nws cov qauv kev ncaj ncees thaum muaj kev sib tsoo yog qhov tseem ceeb hauv kev tiv thaiv lub cev ntawm lub tsheb thiab tiv thaiv cov neeg nyob ntawm kev raug mob hnyav.
Tus tsim ntawm tus crossmember yog ua tib zoo tailored kom optimize nws crashworthiness. Cov neeg tsim khoom xav txog yam xws li kev xaiv cov khoom siv, cov duab sib luag, thiab cov ntsiab lus txuas los xyuas kom meej tias tus ntoo khaub lig tuaj yeem faib tau zoo thiab nqus cov quab yuam. Kev siv cov ntaub ntawv muaj zog, xws li qib siab steel alloys lossis aluminium