Lub teeb yuag siab load bearing muaj peev xwm 2.5mm thickness sab hauv txoj cai kaum sab xis rau cov yeeb nkab sib koom ua ke.
Peb yog cov chaw tsim khoom ntawm cov hlau txuas.Peb cov khoom muag ncaj qha los ntawm cov chaw tsim khoom.Nrog tus nqi qis thiab kev xa khoom loj, peb yog qhov kev xaiv zoo tshaj plaws rau cov neeg muag khoom.