The key points of quality introspection of reinforcing steel engineering include three aspects:

　　1、原材料

　　1. Raw materials

　　2、钢筋加工

　　2. Processing of Reinforcement Bars

　　3、钢筋装置

　　3. Reinforcement device

　　钢筋工程质量规范及查验办法应施行《混凝土构造工程施工质量验收规范》(GB 50204—2002)中有关钢筋局部规则。

　　The local rules of reinforcement in Code for Acceptance and Acceptance of Construction Quality of Concrete Structural Engineering (GB 50204-2002) should be implemented in the quality specification and inspection method of reinforcement engineering.

　　原材料抽检：

　　Raw Materials Sampling Inspection:

　　钢筋出场时，应按GB1499等的规则抽取试件作力学 反省产物合格证、出功能实验，其质量必需契合有关规范的规则。

　　When reinforcing bars appear in the field, the specimens should be selected according to GB1499 rules for mechanical introspection product certification and function test, and their quality must conform to the rules of relevant norms.

　　有抗震请求的框架构造：

　　Frame structures with seismic requests:

　　对有抗震设防请求的框架构造，其纵向受力钢筋的一强度应满意设想请求。当设想无详细请求时，对一，二级抗震品级，查验所得的强度是实测值应契合以下规则：（1）钢筋的抗拉强度实测值与屈从强度实测值的比值不该小于1.25；（2）钢筋的屈从强度实测项值与强度规范值的比值不该大于1.3。

　　For frame structures with seismic fortification requests, the strength of longitudinal steel bars should satisfy the assumption request. When there is no detailed requirement, the strength of the first and second magnitude seismic grade should conform to the following rules: (1) the ratio of the measured tensile strength to the measured yield strength should not be less than 1.25; (2) the ratio of the measured yield strength to the strength specification should not be greater than 1.3.

　　化学身分专项查验：

　　Special Chemistry Identification Examination:

　　当发明钢筋脆断、焊接功能不良或力学功能明显不反省化学身分等专项目一般等景象时，应对该批钢筋实行化学身分查验或其查验陈述或其他专项查验。

　　When special items such as brittle fracture of reinforcing bars, poor welding function or obvious mechanical function do not reflect on chemical identity are invented, chemical identity checking or its statement or other special checking should be carried out for these reinforcing bars.

　　受力钢筋弯钩和弯折：

　　Bending hooks and bending of stressed steel bars:

　　（1）HPB235级钢筋结尾应作180度弯钩，其弯弧内直不该小于钢筋直径2.5倍，弯钩的弯后平直局部长度不该小于钢筋直径的3倍。

　　(1) The end of HPB235 grade steel bar should be 180 degree bending hook. The straight in the bending arc should not be less than 2.5 times the diameter of steel bar, and the local length of the straight after bending hook should not be less than 3 times the diameter of steel bar.

　　（2）当设想请求钢筋结尾需作135度弯钩时，

　　(2) When it is assumed that a 135 degree bending hook is required at the end of the reinforcing bar,

　　HRB335级，HRB400级钢筋的弯弧内间接不该小于

　　HRB335 and HRB400 steel bars should not be less than or less indirectly in bending arc.

　　钢筋直径的4倍，弯钩的弯后平直局部长度应契合设想请求。

　　Four times the diameter of the reinforcing bar, the local length of the bending hook after bending should meet the requirements of the assumption.

　　（3）钢筋作不大于90度的弯折时，弯折处的弯弧内直径不该小于钢筋直径的5倍

　　(3) When the steel bar is bent not more than 90 degrees, the diameter in the bending arc should not be less than 5 times of the diameter of the steel bar.

　　箍筋结尾弯钩：

　　Stirrup end hook:

　　除焊接封锁环式箍筋外，箍筋的结尾应做弯钩，弯钩方式应契合设想请求；当设想无详细请求时，应契合下一列规则：（1）箍筋弯筋的弯弧内直径除应满意本表主控般项目第4项的规则外，尚应不小于受力钢筋直径；（2）箍项筋弯钩的弯折角度；对普通构造，不该小于90度；对有抗目震请求的构造，应为135度；（3）箍筋弯后平直局部长度；对普通构造，不宜小于箍筋直径的5倍，对有抗震等请求的构造，不该小于箍筋直径的10倍。

　　In addition to welding blocking ring stirrups, the end of the stirrups should be bent hooks, and the way of bending hooks should meet the requirements of the assumption; when there is no detailed requirement for the assumption, the following rules should be followed: (1) the diameter of the bending arc of the stirrups should not be less than the diameter of the stressed steel bars, except for the rule of Item 4 of the main control item in this table; (2) the bending angle of the stirrups hooks; for ordinary structures, it should not be used. For structures requiring anti-seismic, it should be 135 degrees; (3) the local length of stirrups should be straight after bending; for ordinary structures, it should not be less than 5 times the diameter of stirrups; for structures requiring anti-seismic, it should not be less than 10 times the diameter of stirrups.

　　钢筋外表质量：

　　Exterior quality of reinforcing bars:

　　筋应平直、无损伤，外表不得有裂纹、油垢、颗粒状或片状老锈。

　　The tendons should be straight and undamaged. No cracks, grease scale, granular or flaky rust should be found on the surface.

　　钢筋调直：应契合设想要乞降线行有关规范的规则。

　　Reinforcement straightening: It should be in accordance with the rules of relevant norms for begging and landing lines.