偏心距: 4.0 = 2.28 − 2.0 = 0.28 < = 0.67 O. K 6 基礎壓力: 60.91 6 × 0.28 & = ( 1 ± ) 1 2 40 4.0 = 21.62 & 8.83 < 25 . 2 2 工-3-17