Waxaanu bixinaa silig bir ah oo leh saddex daawayn oo aasaasi ah: silig birta madow, silig bir ah oo galvanized ah iyo silig la dajiyay.Silig birta madow, si fudud saliid lagu rinji ka soo horjeeda miridhku, iyada oo aan wax galvanizing.Siliga birta madow waa nooc ka mid ah silig bir kaarboon ah oo adag, oo ku habboon tolidda, dayrka, galvanizing ama xidhitaanka codsiyada.
Xadhkaha Birta Madow waxaa lagu bixiyaa gariiradda, gariiradda ama la gooyaa cabbirro gaar ah ama qaab U.
Siliga Birta Madow waxaa lagu galvanized karaa silig birta galvanized ama la neelin karaa silig bir ah annealed.