抄録
The Housing Secure Law was executed and it is possible to indicate durability grade of buildings. However, in the case of masonry buildings, only one type of masonry structure, that is Reinforced Hollow Unit Concrete Masonry Structure, can be applicable to the law. In this paper, an estimation method for durability grade applicable to all-type reinforced masonry buildings is proposed. The estimation method is fundamental to that of reinforced concrete structure of the Housing Secure Law, and concept of effective cover thickness, countermeasure for ram water and so on are added. And investigations of the method were earned out in the committee concerning about the Housing Secure Law.