Key points of steel bar tying

1. Basic requirements before tying:

1. Adjust the position of the vertical main bars of the concealed columns: adjust the wall steel bars, the spacing of the main bars of the concealed columns at the opening and the Location.

2. Treatment of construction joints on the roof and beam sockets: Check whether the construction joints on the roof and beam sockets are cut in place, otherwise tying is strictly prohibited.

3. Clean the base layer of the formwork: Clean shavings, broken wood, wire tube ends and other debris on the formwork. 4. Laying out positioning: Lay out the axis and positioning edge of the upper structure, draw the main ribs on the template, distribute the rib spacing, and tie the ribs according to the line.

2. Key points for tying steel bars:

1. Implement several five-centimeter standards: the starting bars of the roof steel bars start 5cm from the wall, and the vertical steel bars of the balcony railing start 5cm from the wall. ;

2. Roof protective layer control: The slab protective layer pads are arranged in a plum blossom shape with a spacing of 1000mm to ensure the thickness of the protective layer.

3. Installation of iron horse stools on the roof: In order to ensure the position of the upper steel bars, a horse stool is added between the two layers of steel bars, and the horse stirrups are placed together with a distance of 1.5 meters. At the negative moment reinforcement of the roof, a curb is placed on both sides according to the direction of the wall. Ma Deng Iron is required to be placed on the upper side of the lowest layer of steel bars under the roof plate.

4. Construction joint settings: Construction joints on the roof and rest platform of the stairwell are left at 1/3 of the span. 5. Binding requirements: When tying plate bars, each intersection point must be tied, and smooth buckles or figure-shaped buckles can be used.