Barbed hlau yog cov khoom siv hlau hlau uas muaj ntau yam kev siv. Nws tuaj yeem ntsia tsis tau tsuas yog nyob rau hauv barbed hlau laj kab ntawm me me teb, tab sis kuj nyob rau hauv lub laj kab ntawm qhov chaw loj. muaj nyob rau hauv txhua cheeb tsam.
Cov khoom siv dav dav yog cov hlau tsis muaj steel, cov pa roj carbon tsawg, cov khoom siv galvanized, uas muaj qhov cuam tshuam zoo, thiab cov xim kuj tuaj yeem kho raws li koj xav tau, nrog xiav, ntsuab, daj thiab lwm yam xim.