For buildings in the 1959-80 age group,the department commissioned a consultancy study on the steel corrosion and material deterioration of 13083 buildings,with particular emphasis on their cantilevered structures.

• 至于一九五九至八零年间建成的楼宇，该署则已委聘顾问，就13083幢楼宇的钢筋腐蚀和物料衰坏情况进行研究，特别着眼于楼宇的悬臂式构筑物。