Katanga na wucin gadi na Amurka
Daidaitaccen shingen gini na wucin gadi na Amurka, shingen ƙarfe ne na zamani, wanda za'a iya sake matsuwa da shi da ake amfani da shi a duk faɗin Amurka. Ya cika ka'idodin kayan abu na ASTM kuma an ƙera shi don jure rikitattun yanayi na yanayi a duk faɗin Amurka, kamar feshin gishiri na bakin teku, tsananin zafin jiki a Kudu, da iska mai ƙarfi da guguwar dusar ƙanƙara a tsakiyar Yamma. Yadu shafi wuraren gine-gine
