Nyob rau hauv qhov tseeb, round steel yog ib tug ntev sawb ntawm cov hlau nrog ib tug du nto thiab ib tug ncig cross-section. Ntxiv mus, cov hlau yog ruaj khov, yog li nws lub peev xwm load-bearing kuj muaj zog.
Cov khoom zoo li no muaj cov yam ntxwv ntawm cov khoom txias txias, zoo tensile zog, thiab yooj yim rau kev ua tom qab.
Tab sis kuj hais lus, nws lub zog yog qis dua lwm cov hlau tuav. Yog li ntawd, nws tseem yuav tsum tau xaiv cov khoom siv hlau tsim nyog raws li kev tsim kho tiag tiag, kom cov ntawv thov tom qab kuj tau lees paub.
