Umshini wokwenza i-CZ purlin ungaklanywa nge-Z, okuwumshini wokwenza i-CZ purlin, onosayizi abahlukene be-100-300mm, amasethi amathathu okubhoboza, nogqinsi lwempahla eluhlaza engu-1.5-3.0mm, ohlangabezana ngokuyisisekelo nezidingo zama-purlins ahlukene imakethe.noma umshini we-C purlin kuphela osuka kumayintshi angu-3 ukuya kwangu-10, noma bhoboza izimbobo noma yikuphi ukujiya kwempahla eluhlaza.