Why can t stirrups be spot welded on the main reinforcement

Binding on it, why do you have to weld ah, one is a waste and the other is troublesome, there must be special circumstances to weld, in fact, they do not allow electric welding because the stirrup diameter becomes smaller or the diameter of the main reinforcement becomes smaller after welding, so that the force on the steel bar has an adverse effect.

Because stirrups are resistant to shear stress, while main reinforcement is resistant to compressive stress. They bear different stresses, so they can't be welded.

There is a flexible connection between the main reinforcement and the stirrups.

There is no direct stress.

So there is no need for spot welding.

And. Although the strength of spot welding is high, it can be destroyed with a small displacement.

This is not the case with lashing.

Personally, I think that if you don't weld on the ribs, there is no site where the stirrup binding meets the requirements of the specification, when the tie is good, the acceptance is passed, and when the concrete is poured, the springboard is on the steel bar, and the person walks on it, and the stirrup spacing is basically displaced from the springboard or the parts that have been in contact with the person, that is, the vibrator hits the people to be displaced. I've been on the construction site for more than a decade. If you look at it too much, if you accept it according to the specifications, it is an unqualified building.

Unless except for aerial pouring, in fact, the spacing error of a few centimeters has little impact on the building

If you use electric welding, it is easy to burn out the main reinforcement, but sometimes it needs to be carefully managed if necessary, and the quality will be affected.

1. It is labor-intensive and time-consuming; 2. Electric welding will make the steel bar welding joints brittle.

It's okay too. It's just a waste of time and materials. Like the rebar cage stirrups are spot welded.

Increase the cost, and it is inconvenient to adjust!

Affect the internal chemical properties of the main reinforcement and the cost problem.

Answer: The "steel cage" should be a pile! The reinforcement cage stirrups of cast-in-place piles, the rotary hoops or round hoops should be lashed, but the reinforcement cage is in the requirements of the atlas, how much spacing is spaced each time, and the "stiffened stirrups" need to be welded (welded) with the main reinforcement.

The stirrups of the reinforcement cage should not be welded together with the main reinforcement, just tie the wire (galvanized iron wire) to form it, not a thin steel wire! How do you tie a steel wire well?

The purpose of tying the wire and tying the steel bar is to fix it before pouring the concrete, so as to ensure that the steel bar is in its proper position and is not disturbed by the pouring concrete.

The steel bars in the reinforcement cage should not be welded to each other, which affects the stress state of the steel bars with different force properties.

The rebar is like the skeleton of the body, integrated together to form a whole. The stirrups are tied to the main reinforcement, so that the shear resistance of the whole member is greatly improved. Use a wire tie to tie it. Welding destroys the internal carbon structure of the rebar and is generally not used.

Generally, don't, just tie it together with a tie wire (thin steel wire).

There is no need for special requirements, just lashing.

It is best not to weld, there will be welding damage, which is easy to hurt the steel bar and affect the quality of the steel bar.

If you really need to weld, you can generally use plum blossom spot welding, but pay attention to controlling the current during welding to prevent burning the main reinforcement. Generally, when hoisting, wooden sticks or steel pipes can be tied to the reinforcement cage to prevent deformation.

The practice on our side is interval distance spot welding, why weld?! As long as it is welded, it will hurt the main reinforcement! The stirrups and main reinforcements of the reinforcement cage do not need to be welded, and if you must weld electrically, you should reduce the welding current.

You're talking about engineering pile reinforcement cages, right? Resistance spot welding is sufficient, the current is controlled, and the worker must have a welder certificate, and it is best to spot weld. The actual construction time can be welded one after another. However, special attention should be paid to the positioning of the stiffener hoop to be fully welded and welded firmly.

Summary. Hello, to help you find out that the column longitudinal bar connection part should avoid the stirrup encryption area"Refers to the part of the connection.

To avoid the weak area of Guizi, this area is specified in the G101 atlas.

It must be taken: 500mm, the length of the long side of the column or the length of the diameter of the cylinder.

The largest of the three values, range, 1 6 column net height (1 3 net height when one level above the foundation), is to satisfy all three bars at the same time.

Item. The stirrups of the vertical members must be welded and cannot be lapped.

Hello, to help you find out that the column longitudinal bar connection part should avoid the stirrup encryption area"It refers to the weak area of the connecting part to avoid the cinnamon, which is specified in the G101 atlas as the largest of the three values: 500mm, the length range of the long side length of the column or the diameter of the cylinder, and the net height of 1 6 columns (1 3 net height when the beam liquid is above the base acorn), that is, to meet the three conditions of the beam at the same time.

Hello, the stirrups of the vertical members must be welded and cannot be lapped.

In general, when the gui is short (the aspect ratio is less than 4), the full height is encrypted, but the connection area is still determined according to the range mentioned above. "Stirrups should be configured within the scope of the lap joints of the longitudinal stressed steel bars It means that the lap joints have been staggered in the weak area, but stirrups still need to be configured here, and in the case of lap grip judgment, it is generally necessary to change the staggered lap joints (percentage). Eat whales].

Summary. The stirrups of the reinforcement cage are tied or welded, the ribs on the reinforcement cage can be tied or welded, which is according to the construction company at that time. Hole reinforcement welding can only be said to be a little stronger than lashing, but in actual operation, it will cause a lot of inconvenience.

So later, on the construction site, welding is no longer common. In addition to building bridges, the construction of houses is basically gone, and they are mainly lashed.

The stirrups of the reinforcement cage are tied or welded, the hole bars on the reinforcement cage can be tied or welded, and this is according to the construction company at that time. Hole reinforcement welding can only be said to be a little stronger than lashing, but in actual operation, it will cause a lot of inconvenience. Therefore, the descendants of the family are in the industrial reform shed, and the requirement of welding is no longer common.

In addition to building bridges, the construction of houses is basically gone, and they are mainly lashed.

The reinforcing cage is mainly welding, and the production of reinforcing cages, whether it is the main reinforcement or stirrups, is mainly welded. In the process of hoisting, transportation and installation, the steel cage is not easy to deform, and the engineering quality of the steel cage can be guaranteed. Generally, the steel cage is made in advance, and the number is stacked on the site, and the installation is carried out with a crane during installation, and the steel cage is not easy to deform in the world, which ensures the quality of the project.

Spiral stirrups can be lashed and spot welded, and there are no clear provisions in the current specification.

The connection between the spiral stirrup and the main reinforcement should be tied on the column, because the main reinforcement and stirrups of the column are different forces, and the flexible connection is more reasonable. Due to the consideration of the integrity of the lifting and installation of the pile reinforcement cage, in addition to the stiffening stirrups to have reliable welding, the spot welding connection of the spiral stirrups is conducive to the integrity of the reinforcement cage, so the stirrups of the pile Xiangshan laughing reinforcement cage are generally spot welded.