How To Knit Reinforcement For The Foundation With A Screwdriver
How to knit reinforcement for the foundation
The strength of the constructed building depends on the strength of its SEPARATE elements. That, in turn, acquire it due to their uniform structure. When the concrete solution was unevenly distributed at the stage of pouring or the reinforcement elements moved from their place, the structure loses its uniformity, in certain places it weakens, which means that it can no longer be considered strong.
To prevent the reinforcement from changing its location, it is tied with a baked wire. There are several methods of knitting and fastening, how to correctly knit reinforcement for a foundation, monolithic walls or floors, we will consider in this article.
Tying reinforcement with a screwdriver
When a large enough area needs to be processed, every extra second counts. You can save a little time by replacing the hand hook with your own electric one.
So, you can knit the reinforcement with a screwdriver, as you are slightly improving for working with knitting wire.
Knitting reinforcement with a screwdriver
The tip, from which the hook will be made in the future, must be made of sufficiently strong steel so that it does not deform from prolonged work. The simplest large nail (the minimum diameter should be equal to 4 mm) or a piece of welding electrode will do. It is necessary to saw off the cap in the nail, this end will act as the base, and the end with the tip is bent and becomes a hook.
It is advisable to use the model of the screwdriver that has speed control. So you can easily find the required twisting speed.
Proceeding in the same way as described above: bend the wire in half, and fix its ends on the hook. Then turn on the screwdriver and tighten. Too loose knitting can disperse when pouring the solution, so watch the knot tightness.
Crochet reinforcement for foundation
How to knit reinforcement for a foundation. knitting can be carried out using two types of hooks: simple or screw. Knitting with a simple crochet, the work is done in accordance with the following steps.
How to crochet reinforcement
First, a piece of wire from 20 to 40 cm long is cut off. Then this segment is folded in half and brought to the intersection of the reinforcing rods. We attach the wire to the bar from below and lift its ends up. Threading the end of the hook into a loop formed from one edge of the wire, and the tails from the second edge die at the end of the hook.
Then, with the hand, making circular movements, he firmly held the handle of the hook in his palm. The ends of the wire will begin to twist around each other. After a few turns, simply pull the hook out of the loop. Make sure the knitting is not too tight, as the wire may break.
There is practically no difference between crocheting an ordinary armature and knitting with a screw hook. The beginning of the process is absolutely the same: a piece of wire is folded in half, brought to the intersection from the bottom side, the ends are lifted and fixed at the end of the hook.
Then, instead of twisting with the hand, you need to pull the handle slightly towards yourself. The handle, lifting up, makes the shaft of the hook rotate. Then push the handle down and repeat the procedure. This movement is made until the knitting of the required stiffness is obtained.
When working, the screw hook, then unfolds, then folds so that it rotates, you just need to pull up its handle.
Tying reinforcement for the foundation. Knitting of reinforcement with a pistol (“viscous”)
How to correctly knit reinforcement with this tool is an elementary matter. It is necessary to bring the end of the gun to the intersection of the reinforcement, thread it into the hooks there Placed and press the button.
The gun itself will do the rest: a wire will fly out of it, which will be wrapped around the armature, the free end of the winding will grab the gun and twist around its axis.
Many manufacturers focus on the fact that all knots will be tightened with exactly the same force, which, in theory, should increase the strength of the reinforced object. In fact, this fact is NOT at all critical. the same twist force or not. The main thing is that the knitting is neither too loose nor too tight. Therefore, manual knitting of reinforcement is absolutely no worse than automatic knitting, except that it only takes more time and effort.
In addition, the purchase of this device will significantly hit the budget, and if you only need to use it once, then buying it will NOT justify itself at all.
Tying reinforcement with a screwdriver
When a large enough area needs to be processed, every extra second counts. You can save a little time by replacing the hand hook with your own electric one.
So, you can knit the reinforcement with a screwdriver, as you are slightly improving for working with knitting wire.
Knitting reinforcement with a screwdriver
The tip, from which the hook will be made in the future, must be made of sufficiently strong steel so that it does not deform from prolonged work. The simplest large nail (the minimum diameter should be equal to 4 mm) or a piece of welding electrode will do. It is necessary to saw off the cap in the nail, this end will act as the base, and the end with the tip is bent and becomes a hook.
It is advisable to use the model of the screwdriver that has speed control. So you can easily find the required twisting speed.
Proceeding in the same way as described above: bend the wire in half, and fix its ends on the hook. Then turn on the screwdriver and tighten. Too loose knitting can disperse when pouring the solution, so watch the knot tightness.
How to knit reinforcement for the foundation
The strength of the constructed building depends on the strength of its SEPARATE elements. That, in turn, acquire it due to their uniform structure. When the concrete solution was unevenly distributed at the stage of pouring or the reinforcement elements moved from their place, the structure loses its uniformity, in certain places it weakens, which means that it can no longer be considered strong.
To prevent the reinforcement from changing its location, it is tied with a baked wire. There are several methods of knitting and fastening, how to correctly knit reinforcement for a foundation, monolithic walls or floors, we will consider in this article.
Tying reinforcement for the foundation. Crochet reinforcement for foundation
How to knit reinforcement for a foundation. knitting can be carried out using two types of hooks: simple or screw. Knitting with a simple crochet, the work is done in accordance with the following steps.
How to crochet reinforcement
First, a piece of wire from 20 to 40 cm long is cut off. Then this segment is folded in half and brought to the intersection of the reinforcing rods. We attach the wire to the bar from below and lift its ends up. Threading the end of the hook into a loop formed from one edge of the wire, and the tails from the second edge die at the end of the hook.
Then, with the hand, making circular movements, he firmly held the handle of the hook in his palm. The ends of the wire will begin to twist around each other. After a few turns, simply pull the hook out of the loop. Make sure the knitting is not too tight, as the wire may break.
There is practically no difference between crocheting an ordinary armature and knitting with a screw hook. The beginning of the process is absolutely the same: a piece of wire is folded in half, brought to the intersection from the bottom side, the ends are lifted and fixed at the end of the hook.
Then, instead of twisting with the hand, you need to pull the handle slightly towards yourself. The handle, lifting up, makes the shaft of the hook rotate. Then push the handle down and repeat the procedure. This movement is made until the knitting of the required stiffness is obtained.
When working, the screw hook, then unfolds, then folds so that it rotates, you just need to pull up its handle.
Knitting of reinforcement with a pistol (“viscous”)
How to correctly knit reinforcement with this tool is an elementary matter. It is necessary to bring the end of the gun to the intersection of the reinforcement, thread it into the hooks there Placed and press the button.
The gun itself will do the rest: a wire will fly out of it, which will be wrapped around the armature, the free end of the winding will grab the gun and twist around its axis.
Many manufacturers focus on the fact that all knots will be tightened with exactly the same force, which, in theory, should increase the strength of the reinforced object. In fact, this fact is NOT at all critical. the same twist force or not. The main thing is that the knitting is neither too loose nor too tight. Therefore, manual knitting of reinforcement is absolutely no worse than automatic knitting, except that it only takes more time and effort.
In addition, the purchase of this device will significantly hit the budget, and if you only need to use it once, then buying it will NOT justify itself at all.
Tying the frame of the strip foundation
At the bottom of the trench, the calculated number of longitudinal rods (diameter 12-18 mm) is laid on supports (bosses) 4-5 cm thick. The distance between them depends on the size of the foundation and can range from 5 to 20 cm. If the standard length of one steel bar (6 meters) is not enough for the entire “tape”, then several rods are used. They are connected to each other, observing the normative overlap.
Clamps made of smooth or corrugated steel with a diameter of 8-10 mm are vertically attached to the working rods. The step of the clamps according to building codes must be at least 3/8 of the height of the foundation (20-50 cm).
I installed clamps, the upper belt of the working reinforcement is attached to them with wire, observing the design distance between the rods.
At the corners and junctions, the clamps are placed more often (1/2 step), and the working reinforcement is bent, connecting with the rods of the intersected section of the “tape”.
The bend length must be at least 50 diameters of the working reinforcement.
Making a reinforcing cage in a trench is laborious and inconvenient work. Therefore, experienced builders use such a simple device.
I put longitudinal whips on wooden supports, clamps and the lower belt of working rods are tied to them. The finished structure is transferred and placed in a trench.
The assembly of a monolithic slab reinforcement cage is easier than a strip foundation. The construction here consists of two flat meshes. The lower rods are laid perpendicularly with a given pitch and tied together. Then, at the points of their Peresechen, they put supports made of steel bars and screw the upper mesh to them.
In recent years, fiberglass reinforcement has been used to assemble frames.
You can knit it in several ways:
- Annealed steel wire;
- Plastic cable ties;
- Plastic clips.
Materials
To assemble the frame, use a special annealed wire. It is durable, but soft enough. This allows you to tighten the knots, and do not risk tearing it. The recommended diameter of this material depends on the cross-section of the reinforcing bars and ranges from 1.0 to 1.4 mm.
Cheap wire goes uncoated and is called black. corrosion resistant with a protective zinc layer.
Knitting wire is made in two versions: in coils and measured (in lengths). Working with a skein is more difficult as it has to be manually cut into pieces. Measured material can be used immediately. Wire with loops at the ends is especially convenient.
Crochet technology
There is nothing complicated in this operation. After doing it several times, you will quickly “fill your hand”.
Craftsmen know one little secret that guarantees tight contact: I didn’t twist the loop a little, you need to pull it towards yourself and only then tighten it to the end.
Working with a screwdriver has no fundamental differences from crocheting. The advantage is higher speed and less labor intensity. When using a screwdriver, do not forget to set the rotation speed of its chuck to a minimum.
Do not knit fittings with an electric drill. The large inertia of this tool does not allow you to accurately determine the moment of completion of the tightening.
Methods for connecting steel bars and the main types of nodes are shown in the diagram below.
How to knit reinforcement for beginners: methods, norms and rules, a frame for a foundation
There are only two ways to attach reinforcement to the frame: electric welding and knitting. We will NOT open a discussion on which one is preferable. Let’s just say that the strength of the working rods does NOT decrease with the binder.
Any quarrel weakens the metal, as it creates local stresses in it. This negatively affects the reliability of the entire structure.
Compared to welding, knitting is more laborious.
Despite this, in private construction with its small volumes, it is better to choose them. Especially when it comes to such critical structures as foundations and floor slabs.
Articles:
In this article, we will tell novice builders how to properly knit reinforcement. Consider the tools, materials and technologies used for this work. We hope that the information received will help you to confidently handle metal, we collect strong and reliable frames.
Norms and rules of work
Guidelines for the design and manufacture of reinforcement cages are contained in two regulations. GOST 10922-2012 specifies technical conditions for knitted and welded joints of reinforced concrete structures. The set of rules SP 52-101-2003 regulates the requirements for the design of frames.
On the basis of THESE standards, typical schemes for tying reinforcement for a strip foundation, overlap sizes, diameters of the reinforcement used and other work rules have been developed.
When joining rods in straight and corner sections, the length of the overlaps is important. Snip sets this parameter depending on the diameter of the working reinforcement (in millimeters):
- 300 mm for rods with a diameter of 10 mm;
- 380 for 12 mm;
- 480 for 16 mm;
- 580 for 18 mm;
- 680 for 22 mm;
- 760 for 25 mm.
Reinforcement knitting methods
There are two ways to fix the reinforcing bars: manual and automated.
The manual method uses four types of tools:
- Pliers;
- Hook (simple and reversible)
- Screwdriver with attachment.
Pliers are not very convenient to use. Therefore, they are rarely used and only for assembling small frames. The crochet is used more often. This simple device with a certain skill helps to quickly connect steel rods.
There is an improved modification of the simple hook (reversible). Its base is a screw, which rotates when the handle is pulled back.
By combining a hook with a screwdriver, DIYers have created another convenient device for fixing steel bars in a frame.
Automated knitting is performed with a so-called pistol. This is a rather complex and expensive device used in large facilities. Its performance is such that tying one knot occurs in 1 second.
The device is equipped with a compartment in which a reel of wire is installed. The working body of the pistol feeds it to the fittings and ties it into a knot.
Estimated prices
The cost of tying reinforcement, as the estimator says, “sits” in the total price of 1m3 of reinforced concrete. In square or linear meters, it is considered individually for each type of structure. In this case, it is necessary to take into account various parameters (width and height of the grillage, slab thickness, reinforcement section, the level of complexity of the frame, etc.).
For an approximate calculation, builders use a rate in rubles for 1 ton of metal used. To date, in 2017, it averages from 20 thousand rubles.
How to knit reinforcement for beginners: methods, norms and rules, a frame for a foundation
There are only two ways to attach reinforcement to the frame: electric welding and knitting. We will NOT open a discussion on which one is preferable. Let’s just say that the strength of the working rods does NOT decrease with the binder.
Any quarrel weakens the metal, as it creates local stresses in it. This negatively affects the reliability of the entire structure.
Compared to welding, knitting is more laborious.
Despite this, in private construction with its small volumes, it is better to choose them. Especially when it comes to such critical structures as foundations and floor slabs.
Articles:
In this article, we will tell novice builders how to properly knit reinforcement. Consider the tools, materials and technologies used for this work. We hope that the information received will help you to confidently handle metal, we collect strong and reliable frames.
Norms and rules of work
Guidelines for the design and manufacture of reinforcement cages are contained in two regulations. GOST 10922-2012 specifies technical conditions for knitted and welded joints of reinforced concrete structures. The set of rules SP 52-101-2003 regulates the requirements for the design of frames.
On the basis of THESE standards, typical schemes for tying reinforcement for a strip foundation, overlap sizes, diameters of the reinforcement used and other work rules have been developed.
When joining rods in straight and corner sections, the length of the overlaps is important. Snip sets this parameter depending on the diameter of the working reinforcement (in millimeters):
- 300 mm for rods with a diameter of 10 mm;
- 380 for 12 mm;
- 480 for 16 mm;
- 580 for 18 mm;
- 680 for 22 mm;
- 760 for 25 mm.
Crochet technology
There is nothing complicated in this operation. After doing it several times, you will quickly “fill your hand”.
Craftsmen know one little secret that guarantees tight contact: I didn’t twist the loop a little, you need to pull it towards yourself and only then tighten it to the end.
Working with a screwdriver has no fundamental differences from crocheting. The advantage is higher speed and less labor intensity. When using a screwdriver, do not forget to set the rotation speed of its chuck to a minimum.
Do not knit fittings with an electric drill. The large inertia of this tool does not allow you to accurately determine the moment of completion of the tightening.
Methods for connecting steel bars and the main types of nodes are shown in the diagram below.
Tying the frame of the strip foundation
At the bottom of the trench, the calculated number of longitudinal rods (diameter 12-18 mm) is laid on supports (bosses) 4-5 cm thick. The distance between them depends on the size of the foundation and can range from 5 to 20 cm. If the standard length of one steel bar (6 meters) is not enough for the entire “tape”, then several rods are used. They are connected to each other, observing the normative overlap.
Clamps made of smooth or corrugated steel with a diameter of 8-10 mm are vertically attached to the working rods. The step of the clamps according to building codes must be at least 3/8 of the height of the foundation (20-50 cm).
I installed clamps, the upper belt of the working reinforcement is attached to them with wire, observing the design distance between the rods.
At the corners and junctions, the clamps are placed more often (1/2 step), and the working reinforcement is bent, connecting with the rods of the intersected section of the “tape”.
The bend length must be at least 50 diameters of the working reinforcement.
Making a reinforcing cage in a trench is laborious and inconvenient work. Therefore, experienced builders use such a simple device.
I put longitudinal whips on wooden supports, clamps and the lower belt of working rods are tied to them. The finished structure is transferred and placed in a trench.
The assembly of a monolithic slab reinforcement cage is easier than a strip foundation. The construction here consists of two flat meshes. The lower rods are laid perpendicularly with a given pitch and tied together. Then, at the points of their Peresechen, they put supports made of steel bars and screw the upper mesh to them.
In recent years, fiberglass reinforcement has been used to assemble frames.
You can knit it in several ways:
- Annealed steel wire;
- Plastic cable ties;
- Plastic clips.
Materials
To assemble the frame, use a special annealed wire. It is durable, but soft enough. This allows you to tighten the knots, and do not risk tearing it. The recommended diameter of this material depends on the cross-section of the reinforcing bars and ranges from 1.0 to 1.4 mm.
Cheap wire goes uncoated and is called black. corrosion resistant with a protective zinc layer.
Knitting wire is made in two versions: in coils and measured (in lengths). Working with a skein is more difficult as it has to be manually cut into pieces. Measured material can be used immediately. Wire with loops at the ends is especially convenient.
Reinforcement knitting methods
There are two ways to fix the reinforcing bars: manual and automated.
The manual method uses four types of tools:
- Pliers;
- Hook (simple and reversible)
- Screwdriver with attachment.
Pliers are not very convenient to use. Therefore, they are rarely used and only for assembling small frames. The crochet is used more often. This simple device with a certain skill helps to quickly connect steel rods.
There is an improved modification of the simple hook (reversible). Its base is a screw, which rotates when the handle is pulled back.
By combining a hook with a screwdriver, DIYers have created another convenient device for fixing steel bars in a frame.
Automated knitting is performed with a so-called pistol. This is a rather complex and expensive device used in large facilities. Its performance is such that tying one knot occurs in 1 second.
The device is equipped with a compartment in which a reel of wire is installed. The working body of the pistol feeds it to the fittings and ties it into a knot.
Estimated prices
The cost of tying reinforcement, as the estimator says, “sits” in the total price of 1m3 of reinforced concrete. In square or linear meters, it is considered individually for each type of structure. In this case, it is necessary to take into account various parameters (width and height of the grillage, slab thickness, reinforcement section, the level of complexity of the frame, etc.).
For an approximate calculation, builders use a rate in rubles for 1 ton of metal used. To date, in 2017, it averages from 20 thousand rubles.
Hook screwdriver
To automate the knitting process, you can use a screwdriver with a homemade hook, which is easy to make from a slate nail.
Hook screwdriver for tying reinforcement
Such a device allows you to speed up the process, and using the regulator of torque options, the tool can be adjusted so that the tension of the bundle is maximum, and the wire will not break.
Rebar tying tool
Wire tying of reinforcement can be done using different techniques and using different tools.
Knitting tools and accessories:
- Hook;
- Handy means:
- Homemade hooks;
- Hook screwdriver;
- Steel bar with a diameter of approximately 50 mm and a length of 250 mm;
Step-by-step instructions for laying and binder reinforcement
Knitting a reinforcing cage and laying it in place for one person is quite difficult and inconvenient. It is best to get the job done by a team of two or three people.
The simplest and most convenient way is to knit reinforcement on the ground, followed by laying the finished frame elements in a trench.
You need to create a metal skeleton in a specific sequence:
- Reinforcement rods are prepared. To do this, you need to cut long rods to the desired length.
- Two long rods are laid on a flat area and their ends are aligned.
- Having retreated from the edge of the rods about 20 cm, horizontal spacers are tied on both sides in one of the ways.
- Maintaining a distance of 20 to 40 cm, tie similar spacers along the entire length. The result is one frame element.
- To get the second part, you need to repeat the steps.
- Next, you need to fasten both parts together. To do this, two horizontal struts are tied along the edges of the structures.
- Now, in the same way, the frame is tied along the entire length.
- At the bottom of the trench, pads are installed, having a height of about 5 cm. On THESE pads, the bottom row of the frame will lie. Supports are installed on the sides of the trench, which will hold the mesh in the desired position.
- Next, measure the corners and joints that are NOT knitted and cut off the corresponding pieces of reinforcement. With these segments, the meshes assembled on the ground will be connected into a single structure.
- The reinforcement is knitted by the overlap method. First, the lower turns are tied, then they move on to the vertical uprights, and lastly, the upper turns are knitted.
Reinforcement knitting methods
There are two ways to fix the reinforcing bars: manual and automated.
The manual method uses four types of tools:
- Pliers;
- Hook (simple and reversible)
- Screwdriver with attachment.
Pliers are not very convenient to use. Therefore, they are rarely used and only for assembling small frames. The crochet is used more often. This simple device with a certain skill helps to quickly connect steel rods.
There is an improved modification of the simple hook (reversible). Its base is a screw, which rotates when the handle is pulled back.
By combining a hook with a screwdriver, DIYers have created another convenient device for fixing steel bars in a frame.
Automated knitting is performed with a so-called pistol. This is a rather complex and expensive device used in large facilities. Its performance is such that tying one knot occurs in 1 second.
The device is equipped with a compartment in which a reel of wire is installed. The working body of the pistol feeds it to the fittings and ties it into a knot.
Other ways of connecting fittings
Rebar tying is considered the most reliable way to connect reinforcement bars when creating a frame for a strip foundation. However, there are other options for mounting a metal skeleton:
- Using welding equipment. Having a welding machine in your arsenal and some skills in working with it, you can quickly and easily create a frame for a foundation from metal rods. But in this case, it is worth considering the features of such a connection of the reinforcement. First, the quarrel makes the metal thinner, making it more fragile. Secondly, the welded frame will be reliable only if the metal and electrodes are correctly selected, and all the rules and regulations are observed.
- Lap joint. This method assumes NOT a transverse, but a longitudinal connection of the rods. In this case, individual ends of the reinforcement have a release of at least 15 cm for subsequent wire winding.
- With plastic band clamps. This method can be used when building a foundation for small structures. The connection with plastic clamps makes the knitting process somewhat easier. However, it is worth remembering that such a frame is less resistant to stress, and under the influence of low temperature, plastic can burst.
- With clamps or brackets made of plastic or steel.
Rebar knitting hook
- Handwork;
- It is necessary to fill your hand for good speed.
Rebar tying hook
As a rule, such hooks have a comfortable plastic handle, a tool steel tip and practicality in work.
Composite reinforcement binding
One of the types of composite reinforcement are fiberglass elements, which have recently been very popular in the construction of foundations. This is explained by the presence of some advantages:
- Lower price.
- Light weight.
- NOT affected by corrosion.
- High strength characteristics.
The connection of fiberglass reinforcement is performed according to the same rules as metal rods. But you should choose methods that exclude bending of the rods, since fiberglass when bending is easy to break.
You can knit modern reinforcing material with traditional knitting wire. However, the most effective is the use of special clamps, for the manufacture of which molded polyethylene is used.
Tying reinforcement under a strip foundation is NOT a complicated process, but it requires careful attention to each element. Here is the correct knitting of the reinforcing cage depends on the strength and reliability of the base and the future structure as a whole.
The foundation construction technology consists of several main stages: marking, digging a trench, laying a sand and gravel cushion, assembling formwork, tying a frame from reinforcement and pouring concrete. All stages Must be performed in accordance with the necessary requirements and building codes, since the foundation is the basis of the structure and the slightest errors in the process of its construction can significantly reduce the service life.
A special place in the construction of the foundation is played by the binding of reinforcement, a properly connected frame will make the structure as strong as possible. Such a foundation is not afraid of external influences and will NOT burst at the slightest displacement of the soil. Therefore, in this article we will analyze in detail the question: how to correctly knit reinforcement for the foundation?
Reinforcement connection methods
Let’s consider the main ways of connecting reinforcement for the foundation. Experienced builders practice four main methods of tying reinforcement to assemble various frames and meshes:
- Rebar quarrel;
- Wire tying of reinforcement;
- Overlapping reinforcement
- Mechanical connection of reinforcement using steel couplings.
All methods have their pros and cons. In the construction of small houses, the most often used is the installation of a reinforcing cage with the help of a quarrel or tying reinforcement with a wire.
The easiest way
- We take a wire of the required length and bend it in half;
- We bend the bent wire again, but not to the end, but to make a hook;
- Wire drift under the reinforcement connection (see figure)
Diagram of how to knit reinforcement for the foundation
This method is shown in more detail and clearly at the end of the article. By this method, you can knit reinforcement both manually and crochet, and semi-automatic using a screwdriver.
A small selection of 10 photos on binder reinforcement for the foundation.
How to tie foundation reinforcement
The reinforcement cage is an integral part of any foundation, so the question of how to tie the reinforcement is NOT at all idle. Here the quality of the connection of metal rods depends on the durability and the degree of resistance of the structure to external influences. However, before answering the question of how to tie the reinforcement for the foundation, you need to decide what kind of reinforcement you need to use in this or that case, and also know how much reinforcement you need on the foundation.
What reinforcement to use for the foundation
The main characteristic of a reinforcing bar is its diameter. the thicker it is, the more tensile load it can withstand. Ideally, the required diameter of the rod for the reinforcing cage is determined at the design stage, starting from such parameters as the heaving of the soil, the mass of the future building, etc. However, not everyone builds according to the project, so you have to get out of the situation.
So, the minimum diameter of reinforcement for the foundation is 12 mm, with the condition that at least 4 bars are used in the frame. On this basis, you can build a country house, a garage, and a house from light materials (frame, from foam blocks, gas blocks or heat blocks). For more massive and heavy structures, reinforcement of larger weight and diameter should be used to strengthen the foundation.
In addition, you should pay attention to the class of reinforcement. Most often, in the construction of private houses and outbuildings, metal rods of class A-3 are used (they can be bent in a cold state at an angle of no more than 90 degrees), less often A-2 (bent 180 degrees).
Tying reinforcement for the foundation
Today there are two ways of knitting reinforcement for the foundation. manual and automated floor. Let’s consider each of them in more detail.
In the first case, a special crochet hook, or ordinary pliers, is used to twist the wire. The reinforcement cage is tied at the intersection of the rods with a wire with a diameter of 0.8 to 1.2 mm. Each connection requires about 20 cm of wire folded in half.
When using pliers, the ends of the knitting wire wrapped around the reinforcement are twisted together, as shown in the photo.
When using a crochet hook, the double-rolled wire is passed under the joint, the hook is inserted into the loop, the other end of the wire is inserted there, after which, by rotating the tool, the joint is pulled together. Illustrating this process is attached.
In addition to conventional crochet hooks, there are also screw hooks, i.e. It is enough to pull the handle so that the hook rotates to twist the wire. How to tie foundation reinforcement using this tool can be seen below.
However, manual knitting of reinforcement is a long and laborious process, so it is not surprising that a tool has appeared that helps to significantly speed up the work. It’s about a knitting pistol. With its help, one wire tie takes time from 0.8 to 2 s. just press the “trigger”. The only drawback of this method is the high cost of equipment. its price starts from 1000, therefore it is rarely used in low-rise construction. How the knitting gun works. see below.