(mm)型号5 6.3 6.5 8 10 12 12.6 14 16 18高度h ±1.5 ±2.0 ±2.0 ±3.0 ±3.0腿宽b ±1.5 ±2.0 ±2.5 ±3.0 ±3.5腰厚d ±0.4 ±0.5 ±0.6 ±0.7 ±0.8弯腰挠度不应超过0.15d通常长度5 ~12m 5 ~19m 6 ~19m
