宽 度 ≤1000 >1000~1200 >1200~1550 1.2~1.25 ±O.13 ±0.13 1.4 ±O.15 ±0.15 1.5 ±O.15 ±O.15 ±O.15 1.6~1.8 ±O.16 ±0.16 ±0.16 2.0 +O.15 -0.18 ±O.18 士O.18 2.2 +O.15 -0.19 +O.19 ±0.19 2.5 +O.16 -O.20 ±0.20 ±O.20 2.8~3.O +O.17 -0.22 ±O.22 ±O.22 3.2~3.5 +0.18 -0.25 ±O.25 ±0.25 3.8~4.O +0.20 -0.30 ±0.30 ±0.30· 4.5~5.5 +0.30 -0.50 +0.40 -0.50 士0.50 6.O~7.O +O.30 -O.60 +0.40 -O.60 +O.40 -0.60 8.0~lO.O +0.20 -O.80 +0.30 -O.80 +0.30 -O.80 11.O~13.O +O.20 -0.80 +0.30 -0.80 +0.30 -O.80(3)用途用于建筑、桥梁、车辆等一般结构。