muaj zog anti-seismic muaj peev xwm, load-bearing peev, anti-extrusion muaj peev xwm: Steel rooj plaub muaj zog load peev xwm, tiv thaiv nplua muaj peev xwm, compression kuj, hnyav tsheb, kuj nyuaj ua rau nws deformation, bearing load ntawm kaum ob ntawm cov neeg thiab cov tsiaj. taug kev nce thiab nqis ntawm nws, tseem tuaj yeem khaws qee yam khoom ntawm cov khoom siv, cov phaj sib xyaw steel phaj tuaj yeem ua lub luag haujlwm ntawm lub rooj zaum ua haujlwm, cov neeg ua haujlwm tuaj yeem ua haujlwm thiab ua haujlwm ntawm nws, Nws kuj tseem siv tau los ua ib qho chaw ua haujlwm hauv pem teb.