Cov hlau t bar yog ib hom hlau uas raug pov rau hauv T-puab. Nws tau txais nws lub npe vim nws qhov seem hla zoo ib yam li tsab ntawv Askiv "t". Muaj ob hom hlau t bar:

1. Cov hlau t bar yog faib ncaj qha los ntawm cov hlau H-zoo li, uas muaj tib tus qauv siv li cov hlau H-zoo li (GB/T11263-2017) thiab yog cov khoom siv zoo tagnrho los hloov cov hlau ob lub kaum sab xis vuam. Nws muaj qhov zoo ntawm kev tiv taus khoov muaj zog, kev tsim kho yooj yim, kev txuag nqi thiab qhov hnyav ntawm cov qauv.

2. Cov hlau kub dov t bar, uas yog siv rau hauv cov tshuab thiab cov khoom siv kho vajtse.

Cov hlau T-bars siv los txhawb ob lub cib ua vaj tse hauv thaj chaw uas qhov qhib hauv qab no yuav tsis raug txhaws. Lub hauv paus ntawm T-bar kaw qhov khoob. Vim tias tas li raug rau cov khoom ib puag ncig, tag nrho peb cov T-bars yog kub dip galvanized kom tsis txhob muaj teeb meem nrog xeb lossis xeb.