A.0.10~0.20D B.0.20~0.30D C.0.25~0.35D D.0.15~0.25D
A.5~10cm B.10~15cm C.15~20cm D.20~30cm
A.樁徑小于1.2m的鉆1孔 B.樁徑為1.2~1.6m的樁鉆2孔 C.樁徑大于1.6m的樁鉆3孔 D.樁徑為1.2m的鉆1孔