受拉钢筋基本锚固长度钢筋种类抗震等级混凝土强度等级C20C25C30C35C40C45C50C55≥C60HPB300一、二级45d39d35d32d29d28d26d25d24d三级41d36d32d29d26d2524d23d22d四级39d34d30d28d25d24d23d22d21d非抗震HRB335、HRBF335一、二级44d38d33d31d29d26d25d24d24d三级40d35d31d28d26d24d23d22d22d四级38d33d29d27d25d23d22d21d21d非抗震HRB400、HRBF400、RRB400一、二级-46d40d37d33d32d31d30d29d三级-42d37d34d30d29d28d27d26d四级-40d35d32d29d28d27d26d25d非抗震HRB500、HRBF500一、二级-55d49d45d41d39d37d36d35d三级-50d45d41d38d36d34d33d32d四级-48d43d39d36d34d32d31d30d非抗震
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