Materials for Reinforcement BindingEven the strongest walls without a normal foundation will gradually collapse, and in order to be durable, reinforcement is usually used. But it also needs to be properly connected in order to end up with a sturdy construction that can withstand the weight of the whole building. That is why special attention and careful approach requires the process of mating reinforcement.
In order to create a solid foundation for the foundation, individual metal rods can be welded. But this method is now resorted to much less frequently than to mating for a number of reasons.
Firstly, the , as a rule, is not possible with independent construction, as few people know perfectly all the subtleties and nuances of this business, so it is much easier to turn to the mating. Moreover, it also turns out much faster.
Secondly, , oxidation processes may gradually develop at welding sites, which means that the weld will not become so strong, and the foundation will lose some of its reliability. When tying rebar risk of corrosion significantly decreases, which becomes another advantage of this method.
Thirdly, , when welding, especially incorrect, the structure of the metal is disturbed, which does not have a good effect on the final quality of work. If the reinforcement is mated correctly, the foundation, lintels and other reinforced concrete structures will be reliable and durable. But the emphasis here needs to be done precisely on the correctness of the work.
Materials for rebar knitting
To rebar the rebar, you must first buy everything you need. First of all, it is the itself fittings : used steel rods of a certain diameter and length. Reliability and strength of the finished foundation directly depends on the thickness of the reinforcement, and there should not be less than 6 mm in diameter. In length, basically, all rods are standard - from 6 meters. It is better to purchase fittings with delivery: it is convenient and will save time and effort spent on the construction of the foundation. Also pay attention to the surface of the reinforcement, because there are smooth products, and there are rods with notches, ridges, grooves. The latter are distinguished by better adhesion with concrete, therefore, as a result, a solid construction is obtained.
Metal rods are connected either with a wire or with plastic clips. And it is the quality of these connecting elements that directly affects the integrity and strength.
is chosen for round-sectioned wire with a diameter of 1.2-1.4 mm: if you take a thinner one, it will not cope with the load, and if it is thicker, it will be hard to bend. Annealed steel wire, which is usually sold in coils, is excellent for this purpose. It bends easily, quickly takes the desired shape, but it has high strength and durability. It is better not to use unfired wire for these purposes, it is much more difficult to work with it: it is difficult to bend it, it often breaks, but if necessary it can be turned into burnt. So, it is enough to hold it over an open fire, and then leave to cool in air for half an hour.
For knitting, you will need pieces of wire 25-30 cm long: cutting or biting each time the necessary piece is not very convenient, therefore, experienced experts recommend folding the wire several times, observing the required length for work, and then simply cutting the bending points with a grinder. Thus, in a few minutes all the elements will be ready, and you will not have to be distracted by the constant cutting.
plastic clamps are becoming more and more popular now, but many builders remain conservatively tuned and do not trust this mounting method. Nevertheless, the use of clamps provides reliable fixation of reinforcement, but is also associated with many subtleties. Thus, the “bare” frame poorly withstands dynamic loads, and if it is wrong to step on the upper elements of the whole structure during assembly or to incorrectly fill it with concrete, then some fasteners may not withstand and crack. With particular care, vibration equipment will also need to be used when compacting concrete. The obvious advantage of plastic clamps is the simplest process of using them, because just enough to properly tighten the clamp at the junction of the two rods, and this can be done quickly and easily.
Tools for knitting reinforcement
Of course, you can also knit the wire with your hands, but the process will be simpler, faster and more efficient if you use special tools for this. So, you can use hook for knitting reinforcement : these are full in hardware stores, and it's not a problem to get them. You can find the most common models, as well as screw and semi-automatic hooks: although they facilitate the work, they still require the application of physical force, if not to rotate the hook, but to pull the tool. Many professionals say that store hooks are not always convenient, they are short, and they rust quickly, so they advise you to make such a tool for yourself: in the end, you can save money and make the future mating process more convenient. To do this, you may need a piece of corrugated reinforcement, and the bearing can be mounted in the handle to make it easier to work. For these purposes, suitable and nail, which can be used as a nozzle for the screwdriver.
An alternative to hooks and all home-made products is the pistol for armature. This device, which greatly simplifies and automates the entire process, and will become simply indispensable when it comes to large-scale construction. The device itself twists the wire with the necessary force and to a certain extent in record time — 0.8 s. In addition, such devices weigh a little, so the second hand can be free, it can hold the mount. Depending on the diameter of the reinforcement, a certain model of the pistol is selected, and the modern range allows you to choose the technique for any diameter of steel rods. Due to the high cost of this unit, it only makes sense to buy it from large construction companies.
At home, you can create an alternative to the gun for knitting fittings and re-equip for this the usual screwdriver: the drill will not work because of the higher rotational speed. Some kind of crochet hook is inserted into the tool holder, which can be made independently from a wire with a cross section of 4 mm, a thick chopped off nail, a piece of electrode, etc. You don’t have to rotate with your own hands - you just need to press a button and hold the tool firmly.
With a gun, rebar binding is 5-7 times faster than using a hook, but this method also has its disadvantages. It is very poorly suited for hard-to-reach places, consumes more wire and needs regular battery recharging or connection to the electrical network.
Methods and schemes for fitting
stuck out from under the concrete. Now you can produce a bunch. Knitting of reinforcement can occur in several ways, depending on the tools and materials used.
So, if self-locking plastic clamps are used for mating, then no questions can arise here in principle, and most importantly, it is good to tighten them. Even easier is the case with the gun, which he does everything himself in an instant. The most difficult and time-consuming process is the process of mating reinforcement with wire and hook: several basic methods and techniques are used.
To date, there are many options to bind the reinforcement, which differ in where the wire is bent. In principle, in terms of reliability and strength, all options are almost the same, and everyone can choose the technique that is most convenient for him.
Method number 1
The simplest and most common option, which includes the following sequence of actions:
- fold the wire piece in half;
- conduct the wire under the armature, in the place of the connection of two rods;
- we pass a hook in a wire loop;
- pull the free end of the wire with your fingers to the hook and impose on it, slightly bending;
- begin the rotational motion of the hook, twisting both ends of the wire;
- after 3-5 turns, when the connection is securely fastened, you can get the hook from the loop.
Method # 2
The process has a lot in common with the previous one, but it is still a little different:
- folds the wire twice and leads it under the armature to the required connection point;Hook crochet
- the second end is bent over the hook in order to form an O-shaped loop;
- twist the resulting loop to achieve a reliable twist, and then pull out the hook.
Method number 3
According to many experts, this method is the most convenient, since it frees one hand:
- we start wire for rebar;
- insert a hook into the loop and use the other end of the wire to hook;
- bend the wire down;
- pull the hook towards us, twist it several times and everything is ready.
Method number 4
- again fold the wire in half and plant under the armature;
- properly we press it to the rod, and bend the ends towards ourselves;
- insert the hook, make a few turns and pull out the hook.
This method allows you to get a more reliable twist. The most experienced masters advise to bend the wire before twisting, so as not to do a lot of turns, because reliability does not increase, but there is a possibility that the wire will simply break. The optimal number of revolutions - 3-5.
As you can see, all methods are very similar, and differ only in nuances. If you want to knit reinforcement with your own hands, then after several attempts, you can do a bit of a job and choose the best option for yourself. Some masters say that the process of hand-knitting is simplified if you use screw hooks, but this is a matter of technique and habits.
At the end of
, rebar tying is, albeit not the easiest thing to do, but, in principle, quite doable even by the most inexperienced craftsman. You only need to stock up on the necessary tools, choose the appropriate method of mating, and proceed to action. Of course, using plastic straps is the easiest and cheapest way to do it, and a special gun for tying is even faster, but it will be very expensive, so many people still use a special hook: it is easier for them to work longer, but with a certain trick it’s easy, butstrong connections are obtained.