In building demolition, the fall-down method is commonly employed. This approach involves cutting the lower part of the external wall and columns to facilitate the controlled collapse of the exterior wall. The wall is subsequently pulled down using wire ropes. However, this cutting process poses risks, as the unexpected collapse of wall, potentially injuring workers. The primary causes of these collapses include excessive cutting of the wall's lower portion and the tension in the wire ropes. In addition, no established methods exist to prevent the inward collapse of the exterior wall during the cutting process.
This study focuses on preventing accidents related to the collapse of external walls while using the fall-down method. It examines a suitable cutting technique for the lower part of the exterior wall and the necessary tension levels for wire ropes through tests and analyses. The study also outlines an effective measure for preventing wall collapse.

Keywords: collapse, fall-down method, external wall, column, cutting edge, reinforced concrete, wire rope, temporary members