Use steel bars of the same grade and size and diameter to attach the steel frame, unscrew it, and tie it externally. Electric welding. It is important to ensure that after the connection is made, the steel bars on both sides of the relative component must be checked to ensure that they are at the same level.
The electric welding of additional steel bars requires single-layer welding, with a welding length of 10d, to avoid lateral misalignment of the steel truss. The design drawing should indicate the pre embedded holes, and reinforcement plates should be set around the holes. When the floor slab encounters a steel beam and there is a change in the appearance of the laser cutting plan, the laser cutting position also needs to be set with reinforcement plates, and the rubber support reinforcement should be added to the wound area.
In the rubber bearing of deep steel truss of polar reinforcement plate, each side shall not be less than half of the total area of the disconnected load-bearing reinforcement and not less than 212 polar vertical reinforcement truss. For the upper chain wall of the truss, the additional surface reinforcement wall * concrete reinforcement protective layer must be less than 15mm.
In the process of adding extra steel bars, special attention should be paid to the protection of already laid floor slabs, and it is not advisable to walk or trample on the hot-dip galvanized sheet. Prohibit arbitrary rotation and disconnection of the steel truss: If it is necessary to disconnect, the steel truss should be connected again using steel bars with communication and exchange models and specifications
The binding construction sequence of additional steel bars for steel truss floor slabs
Set additional steel bars at the bottom → Set additional steel bars at the hole edge → Set additional steel bars at the top → Set connecting steel bars → Set and make negative checking steel bars
Additional steel reinforcement construction project and pipeline laying:
The connection steel bars of the concrete floor slab, the rubber support steel bars, and the steel bars at the vertical angle with the steel truss floor slab must be set according to the design regulations. And it should be bound with the steel bar truss, using double wire, variable, and double buckles to firmly bind it. The connecting steel bar rubber support steel bar should be placed according to the design drawing. The upper steel bar at a straight angle to the steel bar truss should be placed under or above the chain steel bar of the steel bar truss according to the design drawing. The lower steel bar should be placed above the hidden bar steel bar of the steel bar truss.
After laying a portion of the total area of the pole steel truss, it is necessary to immediately bind the steel bars connecting the rubber support steel bars and the steel bars at the vertical angle with the steel truss to ensure that the floor slabs are connected as a whole.