Ciam teb ua raws li ib qho tseem ceeb ntawm txhua txoj hauv kev, nruab rau hauv lub vaj, yog tias nws yog raws li paving slabs. Nrog kev pab los ntawm cov ntsiab lus no, nws muaj peev xwm muab qhov zoo nkauj ntawm sab nrauv thiab muab rigidity rau cov qauv, uas yuav tiv thaiv los ntawm cov teebmeem ntawm nag lossis daus. Yog tias cov curbs tau teeb tsa, ces koj tuaj yeem paub tseeb tias txoj hauv kev yuav nyob twj ywm zoo li nws yog thaum nws tau pw