How to install steel bars?

In order to ensure the correct position of the steel bars, tie a horizontal bar or stirrup outside the vertical stress bar, and spot weld it to the vertical bar to fix the position of the wall and column bars. Use a wire hammer to correct the spot welding.

wall

①The steel mesh binding of the wall is the same as that of the foundation. When the steel bars have 90° hooks, the hooks should face into the concrete.

② When using double-layer steel mesh, braces (hooks) should be set between the two layers of steel bars to fix the spacing of the steel bars.

③When tying wall reinforcements, the verticality of the hanging wires should be controlled, and the spacing of the main reinforcements should be strictly controlled. The three horizontal sections on the upper and lower sides of the shear wall should be fully tied, and the rest can be tied at plum blossom points.

④In order to ensure the correct position of the steel bars, tie a horizontal bar or stirrup outside the vertical stress bar, and spot weld it to the vertical bar to fix the position of the wall and column bars. Use a wire hammer to correct the spot welding.

⑤ It is strictly forbidden to open holes after the exterior wall is poured. All embedded parts and buried pipes at the entrances should be reserved. See the construction drawings for details of reinforcement around the holes. Steel bars are reserved in walls and columns to serve as lightning protection grounding leads, which should be welded into pathways. The location, quantity and method are detailed in the installation construction drawing. Qualified welders should be selected for the welding work, and the structural steel bars must not be damaged. The pre-embedding of water and electricity installation must be coordinated with the civil engineering, and no wrong burial or leakage can be allowed.

Beams and slabs

① When the longitudinal stress-bearing steel bars are arranged in double or multiple layers, short steel bars with a diameter of 15mm should be placed between the two rows of steel bars. If the diameter of the longitudinal steel bars is greater than 25mm, the diameter specifications of the short steel bars should be the same as the longitudinal steel bars.

② The stirrup joints should be arranged in a staggered manner and tied with the two erecting bars. For cantilever beams, the stirrup joints should be at the bottom. The rest of the procedures are the same as for columns. The outer corners of the beam's main bars and stirrups should be fully tied, and the rest can be tied at plum blossom points.

③The steel mesh binding of the slab should be the same as that of the foundation, and the intersection points of the steel bars of the two-way slab should be fully tied. It should be noted that the negative steel bars (surface reinforcement) on the upper part of the board must be prevented from being stepped on; especially for cantilever boards such as awnings, overhangs, and balconies, the position and height of the negative steel bars must be strictly controlled.

④At the intersection of the plate, secondary beam and main beam, the steel bars of the plate are on the top, the steel bars of the secondary beams are on the middle layer, and the steel bars of the main beam are on the bottom. When there are ring beams or pad beams, the steel bars of the main beam are on the top.

⑤The starting point of bending of floor slab steel bars. If the processing plant (field) does not bend during processing and the design drawings do not indicate otherwise, the steel bars can be bent according to the following regulations. The side span supports of the slab are bent according to the span of 1/10L. starting point. For the mid-span and continuous multi-span of the plate, 1/6L of the center line of the support can be used as the bending starting point.

⑥ When the steel bars at the frame beam nodes are very densely interspersed, it should be noted that there should be a clear spacing of 30mm between the main bars on the top of the beam to facilitate the pouring of concrete.