Demolition work which is used by mechanical equipment, or gas cutting of members by a manual technique is mainly used for finishing materials and building steel structures. Depending on the case, demolition work is carried out sequentially from a part of structure easily demolished. Here, we propose careful demolition of column-girder connection arranged for low-storied steel structures in reverse order of a conventional erection, which is carried out in reverse rotation or gas cutting of high strength bolts, and evaluate about cutting effectiveness and quality of these members. Our verification also indicates that the result applies to actual low-storied steel structures.
