1. When the vertical steel bars in the column are overlapped, the hooks of the corner steel bars should be at 45° with the formwork (the polygonal column is the bisector of the inner corner of the formwork, and the circular column should be perpendicular to the tangent line of the formwork), and the hook of the middle steel bar should be at an angle with the formwork. into 90°. If a plug-in vibrator is used to cast small-section columns, the angle between the hook and the formwork shall not be less than 15°.
2. The joints of the stirrups (overlapping hooks) should be staggered on the four corners of the longitudinal steel bars; the corners of the stirrups and the intersections of the longitudinal steel bars should be firmly tied (the straight parts of the stirrups and the intersections of the longitudinal steel bars can be tied firmly at intervals), and tied When tying stirrups, the buckles should form a figure-eight shape with each other.
3. The steel bars of the lower columns are exposed to the floor. It is advisable to use tool-type column hoops to retract them into one column bar diameter to facilitate the overlap of the steel bars of the upper columns. When the column section changes, the exposed part of the lower column steel bars must be shrunk accurately before binding the beam steel bars.
4． Steel bars such as frame beams, corbels and column caps should be placed inside the longitudinal steel bars of the column.
5. The binding of column steel bars should be carried out before the formwork is installed.
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