For the purpose of judging the safety of existing masonry walls, we applied 6 kinds of methods which we have studied. It was cleared as follows. From these 6 methods, much the same results could get, but incidentally, based on their hypothesis, large variance could happen. Therefor, to get more accurate judgement usingstudied methods, the corrected soil constants by which checking the results of commonly used soil-slope circular slip surface method should be used. On the other hands, the collection of the field data or the analysis using the computer areexpected.
