What you need to mating wire. Band assembly for ribbon foundation: scheme and examples of mating with their own hands
Armature in the foundation performs an important role - does not allow the design to collapse when bending. To connect the rods among themselves, one of two methods can be used: nipping or welding. The first method is most preferable, although it requires large labor costs. To competently perform knitting fittings, you need to get acquainted with the technology of work.
The connection of the rods among themselves can be performed in three ways: a pistol, crochet or pliers. The first option will allow you to do everything without unnecessary labor and time costs, but will require the availability of special techniques and the ability to handle it.
For mating reinforcement use knitted wire. The clamps need to be chosen in accordance with GOST "Wire steel low carbon overall use. Technical conditions. " The material must be treated by the roasting, which will increase the flexibility and simplify the work on the mating frame from the reinforcement. At the same time, the strength of the clamps for the compound does not decrease, which allows not to worry about reliability. When the diameter of the reinforcement for the foundation is not more than 16 mm, it is recommended to use a wire with a cross section 1.2-1.4 mm. Smaller clamps will not be able to guarantee the connection strength, so they are folded several times. It is important to remember that the thickness of the wire, the more difficult it will bend it.
When working with a special pistol, there are no problems, but with a private house-building, it is rarely resorted to its help. More often builders choose knitting hooks. To make the connection you need to act according to the following scheme:
- Prepared source materials. In this case, it is necessary to cut the knitted wire on a part of a length of 20-25 cm each and folded twice.
- The wire is slightly bend and fed diagonally under the intersection of the rods that need to be connected.
- The hook for mating reinforcement is set in a loop formed when the wire is folded in half. The tool also engages and the second end of the fastener. In order for the end not jumping from the hook, it is bent. At the same time, it is not necessary to produce a wire through the loop.
- The hook rotate clockwise, thus tightening the wire (loop and ends) until it stops. It is important to control the effort so that the wire is not damaged and did not break. In order for the connection to be reliable enough to limit the three-four turns.
- After the connection is performed, it is necessary to gently pull the hook from the loop and move to the next section.
Scheme of mating reinforcement.
Such a technology is used if necessary to connect two rods located perpendicular to each other. Especially many such sites in slab foundations, where reinforcement is made by grids.
Difficulties may occur when using smooth A240 fittings. In this case, the clamps can move freely, which leads to a decrease in the reliability of the compounds and the displacement of the grid nodes. Regulatory documents do not recommend applying for the supporting rods below the class A240, therefore, subject to the norms, there are no such problems.
To simplify work, you can make templates for mating. These elements work on the principle of workbenks. For the manufacture they take wooden blanks with a width of 30-50 cm and up to 3 meters long. They are drilled by grooves and holes, in which the rods will be fixed later. It will be necessary to decompose the segments of the knitting wire.
Read more about the way of connecting fittings, read.
Band assembly for ribbon foundation
When the design is reinforced, it is important to comply with all requirements. Ribbon should be strengthened by frames. The scheme includes the following types of reinforcement:
- Working. It is accepted depending on the cross section of the foundation and load on it. For private houses, it is assigned only on the basis of the size of the tape. The total area of \u200b\u200bthe cross section of rods is calculated as 0.1% of the transverse area of \u200b\u200bthe reinforced design. It is important to take into account the minimum value that for the tape with a length of less than 3 m is 10 mm, and for other cases 12 mm.
- Cross-structural. The minimum diameter is 6 mm.
- Vertical constructive. With a tape height, less than 80 cm must be at least 6 mm, in other cases - 8 mm.
When laying the frame, the rules on the protective layer of reinforcement, which, according to the "manual for the design of concrete and reinforced concrete structures from heavy concrete without prior voltage, is taken equal to:
- 40 mm for working reinforcement in the presence of concrete preparation, 70 mm in its absence;
- 35 mm for constructive reinforcement in the presence of concrete preparation, 65 mm in its absence.
An assembly of a ribbon foundation frame can be performed in two ways: in the pit or trench and on the surface. The easiest to control the accuracy and quality of the compounds during the second method. After all the elements of the reinforcement are connected, the frame is lowered and installed in the design position. When working, it is important to take into account the minimum nesting of the rods when the length is connected by length, which is 20 diameters of reinforcement, but not less than 250 mm. It is important to provide additional reinforcement at the corners of the tape. There are several schemes for performing such compounds (brackets, using additional parts), while the transverse reinforcement step is reduced by half.
One of the possible reinforcement schemes of the ribbon foundation.
Read more about how to correctly reinforce the ribbon foundation.
Assembly
The slab foundation according to the above-mentioned manual is reinforced from such a calculation so that the general cross section of the reinforcement rods in one direction was 0.3% of the plate cross section, the diameter of the rods of at least 10 mm (12 mm at a side length of more than 3 m). It is important to take into account the height of the design. If it is 150 mm and less, they knit one grid, in other cases it will be necessary to launch reinforcement in two rows, handling the vertical clamps between them.
The assembly work of the reinforcement frame is performed in the following sequence:
Read more about how to correctly reinforce the slab foundation.
Armature nippers
The technology here is similar to a belt foundation. The only difference is that it will be necessary to change the reinforcement scheme in the nodes of the fraud and separately standing support. Reinforced concrete woodwork can be installed for various foundations:
- reinforced concrete bar;
- buried piles;
- screw piles.
In all cases, the fastening of the tape and support is performed using fittings. At the same time, the frame knit so that two rods join the pile with the lower belt, and two with the top. Attachment only to the bottom row is incorrect. Reinforcement at the corners and places of the walls of the walls are performed in the same way as for the ribbon design.
Scheme of the proper arrangement of the pairing knot / pile.
Read more How to reinforce the reinforced concrete scarlet.
If the framework of the frame is performed independently, and the builders brigade is invited, unfair employees may suggest replace the knitting welding. Agree to this is not worth it. This attempt to reduce the labor-intensity of the process and increase the speed of work production can lead to a decrease in the strength of the rods in places of compound and premature corrosion of reinforcement.
Tip! If you need contractors, there is a very convenient service for their selection. Just send in the form below a detailed description of the works that you need to perform and offers to you in the post office with prices from building brigades and firms. You can see the reviews about each of them and photos with examples of work. This is free and does not oblige anything.
Any building cannot do without a reliable and strong foundation. The construction of the foundation is the most important and time-consuming stage. But in this case all the rules and requirements for strengthening the foundation must be met. For this purpose, a ribbon foundation is erected, which is able to make the basis of the structure of the structure strong and reliable. It is necessary to consider in more detail the features of the belt foundation, as well as the technology of the reinforcement of the structure.
Features
The ribbon foundation is a monolithic concrete strip without breaks for doorways, becoming the basis for the construction of all walls and partitions of the design. The base of the tape structure is a concrete solution that is made from the cement of the M250 brand, water, sand mixture. For his hardening, an armature framework is used, made of metallic rods of different diameters. The tape is deepened at a certain distance to the soil, at the same time speaking over the surface. But the ribbon foundation is subjected to serious loads (groundwater movement, massive design).
In any situation, you need to be prepared for the fact that various negative effects on structures may affect the basis of the basis. Therefore, if the reinforcement is made incorrectly, at the first slightest threat, the foundation may collapse, which will lead to the destruction of the entire construction.
Reinforcement has the following advantages:
- prevents the sorting of soil under the building;
- affirmatively affects the noise insulation qualities of the foundation;
- increases the stability of the foundation to the sharp differences of temperature modes.
Requirements
Calculations of reinforcement materials and reinforcement schemes are performed in accordance with the rules of the SNIPU functioning 52-01-2003. The certificate has specific rules and requirements that need to be performed during the reinforcement of the tape basement. The main indicators of the strength of concrete structures are the coefficients of resistance to compression, stretching and transverse fracture. Depending on the established standardized concrete indicators, a certain brand is selected and a group. Performing the reinforcement of the belt foundation, the type and controlled indicators of the quality of the reinforcement material are determined. According to GOST, the use of hot-rolled construction reinforcement repetitive profiles is allowed. The reinforcement group is chosen depending on the yield strength under limit loads, it must have plasticity, rust resistance and low temperature indicators.
Views
For reinforcement of the ribbon foundation, two types of rods are used. For axial, which carry a key load is needed by class AII or III. At the same time, the profile should be ribbed, because it has better adhesion with concrete solution, and also in accordance with the norm transmits the load. For super-constructive jumpers, cheaper fittings are used: smooth class AI, the thickness of which can be 6-8 millimeters. Recently, fiberglass reinforcement has become a big demand, because it has the best strength indicators and long-term operational terms.
Most designers do not recommend it to consume for foundations of residential premises. According to the rules, this must be reinforced concrete structures. The features of such building materials have long been known. Specialized reinforcement profiles have been developed that contribute to the fact that concrete and metal are combined into a holistic design. How concrete will behave with fiberglass, as this reinforcement will be reliably connected to a concrete mixture, and whether this pair will be successfully cope with various loads - all this is little known and practically not trifted. If there is a desire to experiment, you can apply fiberglass or reinforced concrete fittings.
Payment
The consumption of reinforcement needs to be performed at the planning stage of the foundation drawings so that in the future to know exactly how much building material will be required. It is worth familiar with how to calculate the amount of reinforcement for fine-breeded base with a height of 70 cm and width 40 cm. To begin with, it is necessary to install the appearance of the metal frame. It will be made from the Upper and Lower Armopoya, in each 3 reinforcement rods. The gap between the rods will be 10 cm, and also need to add another 10 cm for a protective concrete layer. The attachment will be performed by the boiled segments from the reinforcement of the identical parameters in 30 cm increments. The diameter of the reinforcement is 12 mm, the A3 group.
The calculation of the required number of reinforcement is performed as follows:
- to determine the spending of rods on the axial belt, you need to calculate the perimeter of the foundation. It is necessary to take a symbolic room with a perimeter of 50 m. Since in two armoances is 3 bar (in sum of 6 pieces), then consumption will be: 50x6 \u003d 300 meters;
- now it is necessary to calculate how many connections will be required to dock the belts. To do this, it is necessary to divide the total perimeter per step between jumpers: 50: 0.3 \u003d 167 pieces;
- observing a certain thickness of the enclosing concrete layer (about 5 cm), the perpendicular jumper will be 60 cm, and the axial is 30 cm. The number of separate jumpers to one compound is 2 pieces;
- it is necessary to calculate the spending of the rods on axial jumpers: 167x0.6x2 \u003d 200.4 m;
- products consumption for perpendicular jumpers: 167x0,3x2 \u003d 100.2 m.
As a result, the calculation of the reinforcement materials showed that the total amount for spending will be 600.6 m. But this number is inconspicuous, it is necessary to purchase products with a margin (10-15%), since it will have to enhance the foundation in the angular regions.
Scheme
The constant movement of the soil has a serious pressure on the ribbon foundation. So that he firmly opposed such loads, as well as at the planning stage, the sources of formation of cracks eliminated, experts recommend taking care of the correctly chosen reinforcement scheme. The scheme of the foundation is a specific location of the axial and perpendicular rods, which are collected in a single design.
In Sniped No. 52-01-2003, it is clearly considered how the installation of reinforcement materials in the foundation is carried out with what step in various directions.
It is worth considering the following rules from this document:
- the pruhin laying step depends on the diameter of the reinforcement product, the dimensions of the granules of the rubbank, the method of laying a concrete solution and its seal;
- the work hardening step is a distance that is equal to two heights of the threading ribbon cross section, but not more than 40 cm;
- cross hardening is the distance between the rods is half the width of the section itself (no more than 30 cm).
Determining with the reinforcement scheme, it is necessary to take into account the fact that the formwork is mounted in a single frame, and only the angular sections will be obliged inside. The number of axial reinforced layers should be at least 3 throughout the foundation circuit, because it is impossible to determine the areas with the strongest loads in advance. The most popular are schemes in which the compound of the reinforcement is performed in such a way that the cells of geometric figures are formed. In this case, a strong and reliable fundamental base is guaranteed.
Technology of work
Reinforcement of the belt foundation is carried out with the following rules:
- for functioning reinforcement, rods of the A400 group are used, but not lower;
- specialists do not advise welding as a compound, as it dulls the section;
- at the corners, the armature is mandatory binds to, but not welded;
- for clamps, it is not allowed to use heavy reinforcement;
- it is necessary to strictly perform a protective concrete layer (4-5 cm), because it is the protection of metal products from corrosion;
- when performing rod rods in the axial direction are connected to the allen, which should be at least 20 diameters of rods and at least 25 cm;
- with frequent placement of metal products, it is necessary to observe the size of the aggregate in the concrete solution, it should not be stuck between the rods.
Preparatory work
Before proceeding with work, it is necessary to clean the working plot from various garbage and interfering items. According to the pre-prepared markup, a trench is digging, which can be done manually either with the help of specialized techniques. For the walls in perfectly level, it is recommended to mount formwork. Basically, the frame is placed in a trench along with the formwork. After that, the fill with concrete is performed, and it is also mandatory for waterproofing of the structure through rubberoid sheets.
Methods mating fittings
The hardening scheme of the ribbon foundation allows a bunch of bale method. Related metal frame has a high strength relatively with a welding option. This is explained by the fact that the risk of burning metal products is increasing. But this does not apply to factory products. It is allowed to accelerate the work to perform reinforcement in rectilinear areas by welding. But the reinforcement of the corners is produced only with the use of knitting wire.
Before knit fittings, you need to prepare the necessary tools and building materials.
There are two two methods for binding metal products:
- specialized hook;
- knitting machine.
The first method is suitable for small volumes.Machine of reinforcement in this case will take too much time and effort. An annealed wire is used as a connecting material, the diameter of which is 0.8-1.4 mm. The use of other building materials is prohibited. The reinforcement can be connected separately, and after omitting into the trench. Or perform the binding of reinforcement inside the pit. Both are rational ways, but there are some differences. If you make it on the surface of the Earth, you can cope on your own, and the assistant will need.
How to knit fittings in the corners of a ribbon foundation?
For angular walls use several methods of binding.
- Paw.To carry out work at the end of each rod make a paw at an angle of 90 degrees. In this case, the rod resembles a chockerel. The magnitude of the paw should be at least 35 diameters. The curved portion of the rod is connected to the corresponding vertical area. As a result, it turns out that the outer rod of the frame of one wall is attached with the outer other walls, and the internal joins to external.
- Using M-shaped clamps.The principle of execution is similar to the preceding variation. But here you do not need to make a paw, and take a special element of the M-shaped form, the value of which is at least 50 diameters. One part is tied to the metal frame of one wall surface, and the second to the vertical metal frame. In this case, the internal and external clamps are connected. The step of the clamp should be formed ¾ from the height of the wall of the basement.
- With the use of P-shaped clamps.The angle will need 2 clamps whose value is 50 diameters. Each of the clamps are welded to 2 parallel rods and 1 perpendicular rod.
How to properly reinforce the corners of the ribbon foundation, see the next video.
How to perform reinforcement on stupid corners?
For this, the outer rod bent to a certain degree value and fasten it further the rod for high-quality strength gain. Internal special elements are connected to the outer.
How to knit a complementary design with your own hands?
It is worth considering how to knit reinforcement on the surface of the earth. First, only the straight parts of the grid are manufactured, after which the design is installed in the trench, where the corners are reinforced. Prepared segments of reinforcement. Standardized prucks are 6 meters, if possible, it is better not to touch them. If there is no self-confidence that you can cope with such rods, they can be cut in half.
Experts recommend to start knitting reinforcement rods for the shortest ribbon foundation, which makes it possible to purchase a certain experience and skill, it will be easier to cope with long designs. It is undesirable to cut them, because it will lead to an increase in the consumption of metal and reduces the fortress of the foundation. The parameters of the billets should be considered on the example of the foundation, the height of which is 120 cm, and the width is 40 cm. The reinforcement products must be filled from all sides by the concrete mixture (thickness of about 5 cm), which is the initial condition. Considering this data, the clean parameters of the hardening metal frame must be at a height of no more than 110 cm, in width 30 cm. For mating, you need to add 2 centimeters from each face, it is necessary for the overst. Therefore, the billets for horizontal jumpers must have a value of 34 centimeters, billets for axial jumpers - 144 centimeters.
After calculations, the knitting of the complementary design occurs as follows:
- you should choose a flat section of the earth, put two long twigs, the ends of which you need to fill;
- at a distance of 20 cm from ends, horizontal struts are tied at extreme faces. For binding, it will take a wire value of 20 cm. It is twice as much, stretched under the binding site and are delayed by knitting hook. But it is necessary to delay with caution so that the wire is not broken;
- at a distance of about 50 cm, an alternate attitude of the remaining horizontal struts is performed. When everything is ready, the design is cleaned to free space and bind to another frame by an identical way. As a result, the upper and lower parts will turn out to be connected to each other;
- following, it is necessary to install the stops for the two parts of the grid, it can be restored to various subjects. The main thing is to comply with the associated structures to have a reliable profile location, the distance between them should be equated to the height of the bound fittings;
- at the ends, two axial struts are tied, whose parameters are already known. When the framework will resemble the finished device, you can start tosing the rest of the plugs of reinforcement. All procedures are performed with verification of the size of the design, even though the workpiece and are made of the same dimensions, the excess check does not hurt;
- according to a similar method, the binding of all other direct portions of the framework;
- on the bottom of the trench, the gasket is stacked, the height of which is at least 5 cm, the lower part of the grid will be laid on it. Side backups are installed, the grid is mounted in the correct position;
- the parameters of unbound docking places and angles are removed, the segments of the reinforcement product are prepared for connecting the metal frame to the common system. It is worth paying attention to that the nesting of the armature ends should be at least 50 diameters of the bar;
- the lower rotation is attached, after perpendicular racks and the top rotation is tied to them. The reinforcement distance is inspected to all formwork facilities. The hardening of the design ends at this, now you can move to the pouring of the foundation by the concrete mixture.
Knitting reinforcement through a specialized device
To make such a mechanism, you will need several boards with a thickness of 20 millimeters.
The process itself looks like this:
- 4 boards are cut down the magnitude of the reinforcement product, they are connected by 2 pieces at a distance equal to the step of vertical racks. As a result, two identical template boards should be obtained. It is necessary to ensure that the markup of the distance between the rails was the same, otherwise the axial location of the connecting specials;
- two vertical backups are manufactured, the height of which should be equated to the height of the reinforcement grid. The collections must have profile corner supports that will not allow them to turn over. The finished design for strength is checked;
- the legs of the support are mounted on 2 rigid boards, and the two outer boards are stacked on the upper shelf of the opposites. Fixed by any convenient method.
As a result, a model of the reinforcement grid should be formed, now work can be carried out without third-party help. The planned areas are installed vertical separation of the reinforcement product, in advance by means of conventional nails at a certain time, their position is fixed. For each horizontal jumper from the metal, the rod of reinforcement is installed. This procedure is performed on all sides of the frame. If everything is performed correctly, you can proceed to knitting via wire and hook. The design must be done if the presence of the same grid sections from the reinforcement product.
Knitting reinforced grid in trenches
Perform work in the trenches is quite difficult due to the cramports.
It is necessary to thoroughly think about the knitting scheme of each special element.
- On the bottom of the trench, stones or bricks are not more than 5 cm high, they will raise metal products from the ground surface and allow concrete to close the reinforcement products from all the faces. Distance between bricks should be equal to the width of the grid.
- On top of the stones are laid longitudinal bars. Horizontal and vertical rods must be cut according to the necessary parameters.
- Start the formation of the framework of the framework on one side of the foundation. Work will be easier to be easier if you bind the horizontal struts in advance to the lying rods. The assistant must maintain the ends of the rod until they are mounted in the desired position.
- An alternate knitting of reinforcement is performed, the distance between the spacer elements should be at least 50 cm. The reinforcement on all direct portions of the fundamental ribbon is binding.
- The parameters and the spatial location of the frame are checked, if necessary, it is necessary to correct the situation, as well as eliminate the touch of metal products to the formwork.
Multiple errors should be found that inexperienced wizards allow reinforcement without complying with certain rules.
- Initially, it is necessary to develop a plan for which in the future will be calculated to determine the burden on the foundation.
- During the manufacture of formwork, no cracks should be formed, otherwise the concrete mixture will flow through these holes and the strength of the structure will decrease.
- For the soil, it is necessary to perform waterproofing, when it is lacking, the quality of the slab will decrease.
- It is forbidden that the reinforcement rods are in contact with the soil, such contact will lead to the appearance of rust.
- If it is decided to perform the frame reinforcement by the method of welding, then it is better to use rods with an index C. These are specialized materials that are designed for welding, therefore, under the influence of temperature modes, it does not lose its technical characteristics.
- It is not recommended to apply smooth bars for reinforcement. The concrete solution is not for what will fasten, and the rods themselves will slide in it. When the soil moves, such a design cracks.
- It is not recommended to arrange the angles by direct intersection, the reinforcement products are very hard. Sometimes in the reinforcement of angles come to tricks: it is split a metal product to a comprehensive state or with the help of a grinder to feed the structures. Both options are prohibited, because with these procedures, the material loses its strength, which will continue to negative consequences.
Hello, dear readers! Our interview will be devoted to unusual work, which, despite all the simplicity, many are afraid to do themselves, namely how to knit fittings. Today, the curtain of the secrets of this case will open it young, but despite this is a very experienced, built a lot of objects, foreman Nikolay Nikolayevich.
Hello, Nikolai Nikolaevich. We have accumulated a number of questions for you, perhaps they sound simple and unprofessional, but we are not yet familiar with the right names and terminology.
- Good evening Dear readers! I will try to answer the most accessible and full of all your questions. So, let's begin.
Why does the reinforce knit in most cases, and not cook? Does the connection of the reinforcement differ with welding from the mechanical connection?
- Armature, in most cases, knit, not cook. Because with a welded joint, the composition of steel changes, as a result of which weaknesses appear in the rods of reinforcement. Another disadvantage of the welded compound is the deadline, in comparison with the so-called mechanical method (actually, viscous). Also, much depends on the experience of the welder, and if it is "green", in most cases the design will not be able to perform its main purpose - to withstand the load. However, the welded compound is often used in the construction of panel buildings, due to the fact that during the construction of such houses, integrated brigades (welders installers, carpenters, concreteers are mainly used) and take a separate specialty, reinforcers, economically not profitable. As for the mating, this is a simple and fairly fast method of fixing fittings that do not require special skills, this method is most often found in monolithic construction. Live performs the same function as the welded connection, only with the help of knitting wire. In any case, welding, and the nip must perform the same function. The main thing is that when pouring the reinforcement frame of concrete, the reinforcement rods did not change their position and form. The product strengths are not attached - the strength is ensured by the integrity of the design with a spilled concrete.
What are the necessary tools and materials for mating?
— Prod - This is the most important element when performing knitting works, as the quality of the node depends on the quality of the wire and specifically the fixation of the reinforcement, and, therefore, the final product. When viscating, the baked wire is usually used, a diameter of 1 mm, always a circular cross section. The difference between the burned wire from the unreleased in the fact that the first is well bend, it fits tightly to the reinforcement and has the property of tightness (i.e., it does not break with a knats), unless the second, unprocessed, which is seriously broken and breaking the knitting node and breaks . If you are not burned, then do not even try to use it, since it is actually impossible to knit it. Also for mating fittings (mechanical fastening) are necessary hook, or collet, and plastic baries (Locks).
Ordinary hook
Automatic hook
Knitting gun.
Plastic Basins (Locks) - What is it? And what are they used for?
- This is a plastic part that is stacked between the reinforcement and formwork to create a protective layer. Without them, the reinforcement may touch the formwork and, after the fill, it will stick out of concrete and rust accordingly, lose strength and destroy the design.
Please tell us about each tool - describe it advantages, disadvantages when you should apply (simple hook, homemade hook, screw hook, gun)?
As for each instrument separately, then the case is everyone who is used to work. The most common tool is hook or collet. Pistol Good on horizontal surfaces where it is not necessary to be subject to hard-to-reach places. The advantages of the pistol are the speed of work. The disadvantage is that it is extremely inconvenient to knit in hard-to-reach places, the battery and higher wire flow rate is also quickly discharged. Speaking of hooks, then most popular is homemade hook. If you decide to seriously engage in viscous, then it is better to make a hook for mating fittings yourself. Make it from the corrugated reinforcement, and the bearing is installed in the handle to facilitate rotation. Shop hook It is only good for learning, so they are usually short and quickly rust, because of this, a terrible sound is issued and the speed of work is reduced. Exist semi-automatic (screw) hooksBut I do not like to work with them: the cramps of the wires of the wire remain, then the team comes to those. Sneakers and forces it to redo the entire garbage in the overlap. And correctly does, because, maybe you noticed or from acquaintances on the ceiling, rusty stripes that appear on the surface of the ceiling? This is nothing more than a wire or a craft of a master who, when creating a protective layer, did not put under the frame of the bays when filling the reinforcement concrete.
Actually, how to knit fittings using various tools I propose to look at the video.
Video mating reinforcement ordinary hook
Video mating screw crochet
Video about knitting pistol
Is it distinguished by mating depending on the part of the house - wall, foundation, overlapping?
- In theory there are many ways of mating, but in practice two mains are one loop for connecting the brass and 2 loops for connecting to the joint. Almost everything knives of one loop, even the angular elements, although in theory, the angular elements knit with another node. The loop is good with its simplicity and reliability - it is possible to learn in literally in five minutes, and it is difficult to make a mistake.
How long does the assembly of fittings take?
- I did not hear about such a norm, all according to the abilities. Also, the veligation speed is highly dependent on the design: the overlap knit is much faster than the arch with the curved elements.
Is there a certain wire flow rate?
- As such, there is no standard for one knot, there is a flow rate. Such a norm is calculated in the project documentation for the object, based on the fact that 20 cm wires are required, if you knit with a crochet, and if the gun will be more. Calculate consumption, for example, for a wall or overlap separately, it is very difficult, since the part of the nodes will be broken and it will be necessary to bandage, and much depends on the wizard.
Manufacturers of knitting pistols argue that with the help of this device, all nodes will be tightened with the same effort! And as far as important is it - tighten the nodes with the same effort?
- For us, it is not the same for the screed force of the rods, and so that they do not change the position and the structure itself did not change when the shape of the form concrete, since when the protective layer changes, it will be improper thickness and, in the future, cracks and rust will appear on the concrete. In general, the same tightening force of the nodes is nothing more than the advertising move of the manufacturers of pistols, because it does not have such an important value. But all the same, when you knit crochet, specially "kosy" and delaying with obviously different effort is not worth it - such experiments can do it expensive, so we drag it more or less evenly and everything will be fine.
What will be the strength of the structure, if they are wrong to be associated, with insufficient effort, or in this case, the connection is bursting at all?
- If one connection bursts - nothing terrible. I repeat - the most important thing for us so that the design does not change the form when pouring. But still, the correct knitting of the reinforcement will determine the strength of the structure.
What other ways to fasten fittings do you know?
- I also heard about two ways - metal clips and knitting of reinforcement clamps from plastic. Unfortunately, I did not work with them, and I did not hear like friends. Apparently, these methods did not receive for some reason widespread. I myself am an adherent "Classics": I knit with an ordinary crochet, as it's easy and quick and not using all these new-fashioned innovations of the type of screw hooks, clips and pistols.
Thank you, Nikolai Nikolaevich, for your story about this work.
- You are welcome! Contact, I will always be happy to answer any of your questions.
Vlad. Says: 05/26/2013 at 15:23
Hey! All wrote correctly but briefly hook optimally the machine costs -Doroga Special Wire Trucks are worth (nippers) Knipeks) -35 -60 euro and methods (knots) minima 5. And so thanks, well done (8 years old Spain Portugal France and Austria)
Alex Says: 07/31/2013 at 22:41.
it is not clear: it is necessary to knit every node intersection longitudinal with transverse reinforcement or with some step
Admin. Says: 07/31/2013 at 23:00
Yes, it is necessary to knit every crossing of the reinforcement cross. Otherwise, when pouring, the design can be twisted and in the end the fill will not be so durable
Michael Says: 02/21/2014 at 07:33.
Yes, it is necessary to knit every crossing of the reinforcement cross.
:)) And if you knocked overlap on 400kubs? Cross on the cross Budsch month to knit him with strengtheningRadikshnaps. Says: 03.03.2014 at 09:15
There was meant to knit not every cross crossing the cross - inhibit two nodes and each intersection of the reinforcement to tie)
Ivan. Says: 01/21/2014 at 01:40
i wanted to ask and rods of reinforcement in the overlap how to lay one top one from above, or first everything is in one direction and then on them in another direction
Admin. Says: 01/21/2014 at 10:52.
It is more convenient to first be put in one direction, and from above in perpendicular. It is so convenient to lay and bind.
Zafar Says: 01/23/2014 at 00:03
Hello! Room 6 on 4 m How to fill the monolith between the first and fetter the floor and what size of the reinforcement is suitable?
Svetlana Says: 07/12/2014 at 23:31
Hello.
Very important question about bass locks. When pouring the plate everything is clear how and where to put. And how to achieve this protective concrete layer when pouring the walls of the basement? What needs to be substituted between reinforcement and formwork? In addition, the formwork is tightened with metal twists, tightened nuts through the whole wall or tighten the twisted wire, which also sticks out of concrete. How to manage to pour the wall without protruding metal rods and wires? Thank you.
Dmitriy Says: 07/31/2014 at 13:46.
If I understood the question correctly. To fill such a kind of design, the retainer (cone) and PVC tube are used, so that the cones are installed inside the formwork and interconnected the PVC tube, and the rod is inserted into the tube itself, which on both sides is tightened with nuts. Ultimately, all metal parts are spinning and removed, only tube and cones remain in the wall.
Sergey Says: 10/16/2015 at 16:01The people who have stuck with Interskol MV-40 / 14.4 - a pistol? Please buy to the brigade, but they say that if you are 3 times faster, you won't do after that - will be subtracted from sn. And 40k - all the time not a penny ... Mabut Who will advise cheaper an analogue or should not communicate with them?
Igor Says: 09/21/2016 at 09:01
Tell me, please, what kind of thickness should be the fill of the floor in the stable? Under the horse weighing 500-600 kg. And is one layer of fittings enough?
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Armature in frames is better to cook or knit?
When holding concrete works, the question arises - the reinforcement in the frames is better to weld or bind wire?
To answer, you need to determine which position we will determine the advantages.
If you compare the time costs, the welding of electric welding is a little faster, especially if welding of the same type of frames on the stand is welding.
If we consider from the cash costs, both methods are approximately the same way. When welding work, the costs of materials and salary by the Contractor with higher qualifications are increasing. But it is all crossed by an increase in the timing, performed by the work or the involvement of a larger number of people.
But there are cases where welding of reinforcement frames and grids is prohibited by technology and it is possible only to bind fittings with knitting wire. This refers to particularly responsible facilities. Previously, bomb shelter treated such facilities. Representatives of the Customer who put forward such requirements explained this by the fact that during welding, there is a thinning of the diameter of the reinforcement, and therefore the carrying ability of the structure.
And another unpleasant moment accompanying welding is the need to remove scale in places of welded fittings. This requirement is explained by poor concrete contact with the reinforcement coated. Especially when the reinforcement rod is connected along the length, where the weld seam is required.
Currently, the reinforcement in the frames is more likely to associate than weld.
A new explanation - concrete is experiencing stresses at which the welding bursts. Fastening with wire perceives these stresses without consequences. Perhaps this is another fantasy, but this is reality and it has to put up with it. That is, the fittings knit, and not cook.
Tools for knitting reinforcement.
People love to complicate everything and with a tool for knitting fittings too. Bashed with a simple crochet - boring. He began to acquire bizarre forms, devices appear, where the handle rotates around the rod. Then went the mechanization of the process - the mating with the help of a screwdriver and the peak of an ingenuity gun for mating fittings.
Knitting tools fittings
All adaptations are conceived with one goal - to increase speed.
But how much capacity increases in reality? Take for comparison the gun for mating fittings:
Pistol performance for reinforcement of reinforcement.
According to the technical information, the speed of mating with a pistol approximately a node per second. If you judge the work of the pistol on the video below, it takes about 1.5-3 seconds.
Approximately the time spent on this work and with simple pliers (the next video). Perhaps even, the speed of tightening the nodes of the pliers is higher.
Twisting knitting wire with a screwdriver not much increases speed. Even a special hook that is climbing the extra coats of wire does not speed up the process. (Read more on the video at the end of the article)
Hook for knitting reinforcement screwdriver.
Knitting frames.
What a common property and disadvantage of all these devices (except for some ways to knit reinforcement with pliers).
The tightening of the two reinforcements occurs by twisting the "crust" of the two ends of the knitting wire, which does not give a dense connection. Re-starting does not improve fasteners.
For flat grids, it does not matter, as for frames that are prepared in place, to the finished formwork. Armature will remain in the design position when laying concrete, even with a weak tightening.
But if there is a separate preliminary billet for the foundation or beams, then when carrying, they fold.
A simple diagonal mating does not give a dense connection. Even the re-starting "Cross on the Cross" on ensures that the spatial framework during transportation and installation will not work or does not crumble.
The gun, also, does not firmly tighten two intersecting reinforcements.
In addition to the generally accepted circuit of the connection of two intersecting reinforcements, there is a special way. According to this scheme, two reinforcements are tightened with a knitting wire from two sides at the same time. You can understand this by photo and video (playlist with a video at the end of the article).
The knitting skill of such a compound occurs after repeated repetition:
Special wire binding scheme.
Another scheme for connecting two spatial frames into bulk:
Double tightening knitting wire in the node.
It is clear that this way can be attached only to a simple knitting crochet. Or crochet with a semi-mechanical wire feed.
On the site where this device is shown and special forms of staging of knitting wire are demonstrated. (http://yaner8.comunidades.net/)
Hook for mating reinforcement.
The easiest tool for mating reinforcement remains a hook. If the need to tie the reinforcement is caused by surprise, then this can be done with bodies or pliers. But it is best to use hooks for this. Make the hook itself simply. It can old painting roller, an old screwdriver or, as in our case, the exterior of the exterior seams of brickwork.
hook from old painting roller.
I do not see the point of making the shape of the hook "twisted" which is on sale. It is enough to be a comfortable handle and a swept, cone-shaped end. The latter is important. The cone makes it easy to pull the hook from the already tightened node.
All mechanical devices for mating fittings are based on the incorrectly accepted method.
It is enough to make the floor turnover with a crochet and there is a strong tightening of the node. No need to make a few circles with a screwdriver or other mechanized tightening. This requires the right skills. You can understand their essence by reviewing the video.
In one of the comments under the video, I received such a message:
Wire "Cossack"
How can I understand in the photo, this wire is designed for mating with a special tool. Wire itself represents ready-made blanks for knitting fittings. It is not difficult to guess that the cost of such a method of fixing reinforcement increases at least twice. Only on wire costs.
But this is not the main thing in the video. If you carefully watch the moment of twisting the wire, then it can be seen as one (movable) part twists around the second (fixed).
It gives a smooth, but strong tightening and protects against a gust. Rush occurs if you twist both turns (pliers, etc.) at the same time. And he arises at the appearance of the first turn.
Node tightened wire.
This method of tightening the wire is possible only when the wire bends in half. And you can use it everywhere where the clamp is needed - consolidate the rubber hose on the pipe, etc.
Or fasten the foil on the fence:
If a simple solution works, why complicate.
With wire, the simplest solution:
Below a collection of videos on the topic of the article:
Knitting wire, as a building material, rarely attach great importance. But when constructing monolithic reinforced concrete structures, it plays an important role. The main appointments of these products are the binding of reinforcement elements in a durable and reliable frame and fixation of fasteners before welding. The associated reinforcement frame, for example, for the foundation, it turns out not only cheaper, but also more reliable, compared with the welded structure. Other areas of applying knitting wire are the production of steel ropes, masonry grids, chains, barbed wire, cargo fixation during transportation, assembly and packaging.
What knitting wire is needed for fittings
Belongs to the hardware category of steel building materials. Its production uses low carbon steel with a carbon content from 0.08 to 0.25%. The billet is a roller, the final product is obtained by cold drawing - stretching under high pressure through a hole of a smaller diameter. To impart the required properties, the knitted wire is ignited - heated to a high temperature, and then slowly sturd. During this technological event, the crystal structure of the product deformed during pressure treatment is restored. This significantly reduces the internal stresses in the metal.
Thermo treated knitting wire made of low carbon steel has excellent performance:
- high plasticity in combination with sufficient mechanical strength;
- lack of cracks, thanks to slow cooling, naturally;
- low cost;
- the products are easy to use, easily bent, knit, fixed in a given position.
Attention! The wire that has not passed the heat treatment required by the properties does not possess, and it is not recommended for mating fittings. An unlarged wire is heavily bent, when viscating the node breaks and rushes.
What knitting wire is better
The knitting wire is produced by an annealed without coating, galvanized, with a polymer coating.
Annealing is two species - dark and light.
- With dark annealing, which is carried out in the presence of oxygen, the knitting wire acquires a dark color due to the formation of scale.
Tip! The presence of scale on the mechanical characteristics of the influence does not have, but the hands are very dirty. It is recommended to work with it in gloves.
- Light annealing is carried out in special housing furnaces in the presence of an inert gas. Therefore, the surface of such a wire is cleaned, and the price is naturally higher.
If you want to increase the durability of framework frames, for example, the foundation of the tape type, purchase galvanized knitted wire. Galvanic galvanizing is used for knitting wire. Protective coating provides increased corrosion resistance of products. According to the forums, it is very convenient at work.
In the labeling of the wire, the presence of heat treatment is indicated by the letter "O", light annealing - "C", dark annealing - "h". In the zinc coated wire, the coating class is indicated - "1t" or "2t". Products of the class "2t" have a higher zinc coating density.
Knitting wire supplied in bays, motges, rosettes. Manufacturers also offer products for mating frames in the form of wire segments with rings along the edges. Sliced \u200b\u200bwire packaging can have a lot of 0.5-10.0 kg.
Which diameter of the knitting wire is better
The diameter of the knitting wire is determined by the diameter of the reinforcement. In low-rise construction, the reinforcement is 8-12 mm, for which the wire is considered the most suitable with a cross section of 1.2-1.4 mm. Products with a diameter of 1.0 mm are too weak and often broken. With a larger diameter, it is difficult to work.
How many wires will need for reinforcement
To determine the number of knitting wire are determined with the reinforcement scheme. It is difficult to accurately to carry out such calculations, but this is not required, since the price of this product is small.
In places of compounds of two reinforcement rods with a diameter of 10 mm, a wire segment is about 25 cm long, for nodes of three rods, the length of the segment is layered - approximately 50 cm. With an increase in the diameter of the reinforcement, the length of the segment increases. More precisely, the wire consumption for one docking node is determined by the experienced way. A completely simplified version - the number of all docking nodes is multiplied by 0.5 and the required wire is obtained.
Attention! When buying, a calculated amount of wire is recommended to double. Such a stock is necessary because in the process of mating some segments can break or get lost. Purchase Metage may be less declared.
Buy the right amount of knitting wire will help you the table proposed below. From her you will learn how many meters of knitting wire in a kilogram, and feedback - how many meters in a kilogram.
Table of the mass ratio and the length of the knitting wire are most common in everyday life of diameters
Diameter, mm. | Weight 1 m, kg | Length 1 kg wire, m | Mass wire without coating on the coil or in the Motkey, not less, kg | The mass of galvanized wire on the coil or in the Motkey, not less, kg |
0,6 | 0,00222 | 450,45 | 5,0 | 0,6 |
0,8 | 0,00395 | 253,17 | 5,0 | 0,6 |
1,0 | 0,00617 | 162,00 | 5,0 | 0,6 |
1,2 | 0,00888 | 112,6 | 8,0 | 2,0 |
1,4 | 0,0121 | 82,6 | 8,0 | 2,0 |
1,6 | 0,0153 | 65,4 | 8,0 | 2,0 |
1,8 | 0,0200 | 50,0 | 8,0 | 2,0 |
2,0 | 0,0247 | 40,5 | 8,0 | 2,0 |
Note - the minimum mass of the wire knitted without coating and galvanized in motges and coils - according to GOST 3282.
When buying a wire in a motor to determine its length, the mass of the Moke is divided into a lot of 1 m products you need diameter. We take the data on the table. For example, you bought a wire of a wire with a diameter of 1.2 mm, its mass is 50 kg. We produce the following calculations - 50 kg / 0.00888 kg \u003d 5630 m. Using the table, you can make these calculations otherwise. In 1 kg of wire with a diameter of 1.2 mm, it contains 112.6 m, which means 50 kg - 112.6x50 \u003d 5630 m.
Knit or boil fittings
When comparing the welded joint and knitting node, at first glance, the welded seam is more reliable. Is it so? Consider what problems the welded seam is in:
- Welding worsens metal characteristics in the heating zone. Therefore, during operation, either the seam itself can be burst, or the metal that has been exposed to high temperature.
- When pouring a concrete mixture using technology, it is assumed to expose vibration, which negatively affects the strength of the seam.
- Welding works require the involvement of a welder specialist.
Therefore, in monolithic construction, it is often preferred to prefere with a cheaper way to dock the reinforcement - its connection with a knitting wire and a hook.
Hook for reinforcement with your own hands
The hook for mating fittings can be made independently from the same reinforcement or just a steel rod with a thickness of 6-8 mm and bearing. The metal rod bended in the form of a hook, which allows you to conveniently capture the wire. The bearing is mounted in the handle, allowing the hook to rotate quickly.
The hook for reinforcement can be bought - with a straight or curved handle, with different angles of bending handles, shape and hook sizes. The optimal version of the tool design for each artist can be defined only by an experienced way.
Hook for reinforcement semi-automatic and automatic
In the store you can purchase a semi-automatic or automatic hook model.
- In semi-automatic hooks in the handle a spiral is built. Such a hook does not require rotation. If the handle pull over yourself, the tip starts to rotate. This tool is more expensive than manual, its acquisition makes sense when performing large-scale work.
- The semi-automatic version of the hook can be made with your own hands using a screwdriver and a metal rod with a curved end. The rod is fixed in the holder, work leads on the smallest turns.
- Automatic hook for mating reinforcement is called a pistol. Its productivity is a node per second. Wire is not required to cut into measuring pieces. It is simply refueling into the tool, and he himself ties the nodes and cuts off the surplus. For the operation of the gun for mating fittings, the power supply is not required, since it works on the battery. A significant disadvantage of such a tool is a high cost, which pays off with significant amounts of fittings.
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