Feem ntau ntawm cov xaim xaim thiab cov khoom lag luam cable yog tus cwj pwm los ntawm tib qho kev tsim khoom) thiab cov khoom sib tw ntawm seem (uas yog siv ua kab lossis cov khoom siv. Txiav txim siab. Yog li ntawd, kev tshawb nrhiav thiab tsom xam ntawm cov qauv qauv ntawm cov khoom siv cable, tsuas yog yuav tsum tau soj ntsuam qhov kev soj ntsuam los ntawm nws ntu hla.
Cov txheej txheem hlau thiab cov khoom lag luam cable tuaj yeem faib ua plaub lub ntsiab lus sib xyaw: xaim, rwb thaiv tsev thiab cov khoom siv tensile. Nyob ntawm cov khoom lag luam yuav tsum tau thiab thov, qee cov qauv khoom siv tau yooj yim heev.