A .2.0m; B.2.5m; C.3.0m; D.3.5m;
A.29~39Nm; B.39~49Nm; C.49~59Nm; D.59~69Nm;
A.鋼腳手板木腳手板竹腳手板; B.鋼腳手板鐵腳手板竹腳手板; C.鐵腳手板木腳手板竹腳手板; D.鋼腳手板鐵腳手板木腳手板;