评价等级

钢筋应力Mpa

螺栓轴力MPa

接缝mm

I级

80 S 15

0 < S ≤ 30

0 < S ≤ 0.15

II级

110 S 80 15 S 50

30 < S ≤ 85

0.15 < S ≤ 0.5

III级

220 S 110 40 S 80

85 < S ≤ 280

0.5 < S ≤ 2

IV级

S 220 S 80

S > 280

S > 2