Refer to the ductibility and light-weight which improved the construction more safe reliability.

钢构延性好，自重轻、大大提高了住宅安全可性。

But geosytheic of ductibility is large, the rough edge effect to a non-cutting and drilling operations.

但分解质料延展性较大，感化到无毛边和打孔操纵。