The pilaster and the wall between windows were strengthened with the enclosure steel method.Roof beams were strengthened with the sticking steel method.

• 对旧建筑进行加层扩建可以扩大建筑面积，增加建筑物的使用功能，同时又基本不增加土地使用面积，是缓解建筑用地紧张的有效途径。