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Online calculator for calculating the weight of reinforcement. Online calculator for calculating the weight of reinforcement How many tons in one pack of reinforcement

Every person building his own house or just planning construction work often asks the question: “How many meters are there in a ton of reinforcement?”. This question is natural, since all calculations of this product at the construction site are carried out in meters, and when buying - in tons.

Types of fittings

Before looking for an answer to the question: “How many meters in a ton of reinforcement?”, It is necessary to clearly understand what kind of material it is and what are the nuances of its application.

Along with classical steel reinforcement, fiberglass reinforcement is also widely used. This is a fairly new material on the Russian building materials market. Therefore, many prefer steel, as it has already been tested for more than a dozen years.

For various types of work, depending on the need, reinforcement of various diameters (from 0.6 to 4 cm) can be used. Another difference is the presence of special ribs on the outer part of the rod. They are necessary for reliable fixing it in concrete.

Reinforcement application

Almost no modern construction can do without fittings. The main purpose of this building material is the reinforcement of concrete structures:

• Foundations and piles.
• Floors.
• Overlappings.
• Window and door lintels.
• Foundation blocks and more.

For reinforcing ceilings, foundations, piles of other concrete structures that carry significant weight, rods with a diameter of 1.2 to 4 cm are used. In private housing construction, a thickness of 1.2-1.4 cm is sufficient for foundation work. To reinforce the floor in in a private house, thinner fittings (6-8 mm) are most often used. Now you can proceed to the calculations of how much reinforcement in meters in a ton.

Weight calculation

So how many meters of rebar are in 1 ton? The answer to this question depends, first of all, on the material from which it is made (fiberglass, steel) and the diameter of the product. For calculations, we take the dimensions most used in private construction.

So, the ratio of the diameter and weight of one linear meter of a steel product:

And how many in a ton of reinforcement in meters of fiberglass? One of the main advantages of this type of material is its relatively light weight. Another advantage of fiberglass rebar is its ease of transportation. It can be transported by car, as it is lighter and more flexible (it folds into axle boxes at the factory).

The number of meters and pieces of reinforcement in 1 ton depends on the diameter of the rod used. It is necessary to know this when purchasing material, so that you can independently check the quantity of delivered goods, as well as calculate the volume of reinforcement for reinforcing monolithic structures.

Rebar footage in a ton: calculation example, table

Let's take an example of how the calculation is made, find out how many meters of reinforcement with a diameter of 12 mm in 1 ton.

To calculate, we need to know the mass of 1 meter, look, it is equal to 0.888 kg. Now we divide 1000 kg by 0.888 kg, we get 1126.13 m. For convenience, the table below shows the footage of the most popular steel rods in construction.

Knowing how many meters in 1 ton, you can easily convert reinforcement from meters to tons. For example: let's convert 8956 m, rods with a diameter of 12 mm, into tons. For this 8956/1126.13=7.953 (t). In this way, whips of any size can be converted by simply dividing the total length by the length of 1000 kg.

Number of rebars per ton: calculation example, table

Knowing the footage of the rods in 1000 kg., You can make a calculation by the piece. We will also analyze how to do this using an example, let's calculate how many pieces of reinforcement 12 mm in 1 ton, 12 m and 11.7 m long (the most common long lengths produced by factories).
To calculate the number of pieces, we take the total footage in one ton, for rods 12 mm., It is 1126.13 m, and divide by the length of the rod 12 m, we get 93.84 pieces, for a rod 11.7 m long, the result is 96.25 pieces . The table below shows the number of whips in the most common sizes (calculated values ​​are rounded to the nearest tenth).

Calculation example using the table: let's say for the armored belt you need 600 kg of reinforcement 10 mm. In order to make it convenient to transport, 12-meter rods were cut into 6 m. To find out their number, we take the tabular value of 135 (pieces per ton) and multiply by 0.6, equal to 81 pieces. Since they were divided in half, we multiply 81 by 2, we get 162 rods of 6 meters each.

Do not forget that when cutting reinforcement into short rods, its consumption for reinforcing the structure increases, since more overlaps will have to be done. It is worth considering this when calculating and purchasing material for construction.

According to the tables, you can calculate the required tonnage of bars for a monolithic belt and other reinforcing structures, based on the footage of the building. And also, you can calculate for yourself whether the material was brought to you correctly by counting its quantity.

Reinforcement is called metal rods, rods or ropes of various shapes and sections, intended for construction work in order to fasten specialized structures. Reinforcement is indispensable in the manufacture of any kind of devices made of reinforced concrete in order to enhance its strength. According to its characteristics, it is divided into strength classes and can be of various diameters, which affects the effectiveness of its use in reinforced concrete building structures. This article will help answer the questions "How many meters in a ton of rebar?" and “How much does a meter of rebar weigh?”.

In terms of labor costs in production, the presented rolled metal products can be:

• light (with a diameter of up to 12 mm);
• heavy (with a diameter of 12 - 40 mm).

With a steel rod diameter of 12 mm, it is customary to call it reinforcement 12 ( A12) is the most popular rolled metal product in domestic construction.

In the manufacturing process of A12, GOST 5781–82 is strictly observed, and according to its purpose, it is classified into tense and unstressed. According to the choice of production technology, the following types of fittings are distinguished 12:

• cold drawn;
• hot rolled.

Cold Drawn A12 reinforcement is necessary for the manufacture of reinforced mesh, it is supplied in coils (riots) of 6–12 meters and is a reinforcing wire.

hot rolled A12, being a high-quality type of rolled metal, is made from steel with a rounded section, finds its application in the reinforcement of stressed and ordinary structures, gives sufficient strength to reinforced concrete structures and prevents damage during mechanical deformations.

Distinctive features of fittings A12

This rolled metal product can be made of steel of different grades, depending on its application and the requirements for its characteristics. Most often, low-alloy structural steel products are required. This is due to the fact that such products are easily subjected to arc welding.

The main purpose of the A12 is strengthening of reinforced concrete structures, as well as the formation of frame devices to resist the increased load. A diameter of 12 mm is the minimum for the construction of a strip foundation and its grillages, if the reinforcement frame is knitted from four rods. Rental by class happens:

• smooth profile (without corrugation) - class A1;
• periodic profile (with transverse corrugation at an angle to the axis of the rod) - class A3.

This building metal is presented from the manufacturer in rods or coils. The scope of its application is very wide. For the arrangement of the foundation, it is recommended to use hot-rolled reinforcement in the form of rods with oblique corrugation, the presence of which ensures optimal adhesion to concrete. This interaction of materials ensures the strength and durability of the reinforced concrete building structure. The transverse arrangement of reinforced rods in the foundation prevents cracking of concrete and reduces the force load on the resulting structure, and also protects it from deformation.

Advantages fittings A12 that appear in construction:

• high degree of strength;
• relatively high plasticity;
• minimal susceptibility to corrosion;
• high resistance to thermal, chemical and mechanical influences;
• the possibility of creating various configurations of structures by welding and by mechanical connections;
• possibility of application in stressed structures made of reinforced concrete.

There is currently a fairly large selection of graded steel on the building raw materials market. Recently, there has been a gradual transition, on the example of Europe, to products from A500S steel to replace the previously popular A400. This fact, quite logically, is explained by the fact that with the full preservation of the quality characteristics of rolled products, its cost in production is reduced, due to the saving of raw materials in the process of construction operations, up to 10%. For construction costing, this amount of expenses is simply colossal.

A feature of the production of rolled products from this steel grade is the absence of oxidation and, as a result, the absence of rust. At the same time, mechanical, chemical and thermal qualities remain at a very high level. The displacement of the A400 steel grade by the A500S grade in the rolled products makes it possible to reduce its concentration during concreting and, as a result, the consumption of A12 reinforcement. The technical characteristics of the steel used do not allow the welds of the finished structure to collapse. All this leads to an increase in the strength of floors, columns and walls of buildings.

Weight per linear meter of fittings 12

For construction work, it is customary to calculate the amount of reinforcement in linear meters, but it is sold mainly by weight. It turns out that in order to buy the required amount of rolled metal and know exactly its cost, it is necessary to convert the calculated need in meters into units of weight, that is, kilograms, tons, etc. To do this, you can use presented by the table. An alternative to the presented tabular data is an independent calculation of the data, starting from the size of the diameter.

The mass of one meter of reinforced rolled products is shown in the table as diameter to weight ratio. Having information about the mass of reinforcing steel, it is possible to determine the coefficient of reinforcement of the structure (the ratio of the weight of rolled metal to the volume of concrete).

In order to calculate the need for reinforcement, you will need data on how many linear meters one ton of rolled metal contains. The number of meters per ton is a value that depends on several factors. From the presented table it is clearly seen that the footage largely depends on the class of reinforcement.

How many meters in a ton of rebar 12?

In accordance with building codes, the amount of reinforcement in the strip foundation as a percentage of the reinforced concrete element in the section should be at least 0.1%. In an example, it looks like this. If sectional area of ​​the strip foundation is 100 * 240 \u003d 2400 cm square, then the calculated number of rolled bars for longitudinal reinforcement is found by multiplying the obtained volume of the foundation by 0.001, that is, 2400 * 0.001 \u003d 2.4 cm square.

Next, you should resort to the reference data of the table from the manual for the reinforcement of reinforced concrete elements of monolithic buildings. Since we are interested in reinforcement with a diameter of 12, it is obvious that only 2 reinforced rods are needed for the estimated volume of the foundation. The calculation of the consumption of reinforced rolled products for a slab foundation is similar.

Knowledge of the weight of one linear meter of reinforcement is required to calculate the amount of material of a certain diameter in a ton and its weight in the future building structure. This value is normalized and varies depending on the section of the rods. The minimum brand for prestressed and load-bearing concrete elements is corrugated reinforcement with a diameter of 12 mm, as a result, it is the most popular. The scope of application includes road construction, the manufacture of reinforced concrete products (including piece), welded frames and meshes.

Material calculation

The standard weight (mass) of 1 meter of round reinforcement with a diameter of 12 mm is 0.888 kg, this parameter is normalized according to GOST 5781-82. Accordingly, one ton includes 1126.12 m. It is easy to check this value or find it for rods of a different diameter, the basic formulas that relate mass, specific gravity and dimensions are used for calculation:

M p.m. =V ρ, where:

• V is the volume of one linear meter, obtained by multiplying the cross-sectional area of ​​\u200b\u200bthe rod (3.1415 D ^ 2 / 4) by its length (in our case, 1 m). For reinforcement with a diameter of 12 mm V = 0.000113 m 3;
• ρ is the density of steel, the standard value is 7850 kg / m 3. Thus, one p.m. with a diameter of 12 mm, it weighs 0.888 kg.

This formula is also used to determine the total length of the purchased reinforcement, taking into account its mass. Of course, the calculation results are averaged; in reality, the rods do not have a perfectly round cross section, but a corrugated surface. But the data obtained is sufficient to determine and verify the required amount of material. There are standards governing the minimum allowable proportion of longitudinally placed reinforcement in concrete products, for example, for a monolithic foundation tape, it is 0.1% of the cross-sectional area. In general, the percentage of steel in concrete products is quite small, but given that its specific gravity exceeds the density of concrete by at least three times, the total mass of the frame or mesh must be known and taken into account.

An important nuance: the actual weight of 1 meter of 12 mm reinforcement does not always coincide with the calculated one. The parameter is controlled by GOST, but taking into account the manufacture of products from different types of steel, differences in the size of the ribs, the deviation varies from 0.2 to 3% in both directions.

When buying rods with a fixed length piece by piece (small batches), this fact does not play a special role, but for bulk orders, it is necessary to double-check how much a 12 mm reinforcement weighs, in particular, one meter of it. Responsible suppliers indicate this value in their price lists, in fact, each manufacturer has its own.

Other Considerations

In addition to knowing the mass and footage of reinforcement in one ton, when choosing, attention is drawn to the following indicators:

• Rib parameters on the profile: dimensions, pitch, angle of inclination, width.
• The length of the rods and the form of delivery (in coils or in the form of measured segments).
• Type of rolled products - hot-rolled long products are required to reinforce concrete building structures (read about).
• Type of steel, its yield strength, admissibility of use in welding joints.
• Temporary tear resistance.
• The value of relative elongation (within 14%).

Of all the proposed classes in private and residential construction, A3 fittings made of A400 or A500S steel are most in demand. The latter builds the cheapest because of the low content of alloyed metals and is considered almost universal. It welds without problems, provides excellent adhesion to concrete, has good corrosion resistance, toughness and strength. A400 weighs the same (0.888 kg/r.m.), it is recommended for strengthening especially stressed structures, the connection of the rods to each other is carried out exclusively viscous.

Products are sold in dimensionless coils or in the form of rods from 6 to 11.7 m, if necessary, at small retail outlets they are cut into segments of the desired size.

The cost of one meter of 12 mm rebar varies from 29 to 32 rubles and depends on the type of steel, season and other market factors. Most often, the price is indicated for one ton (from 30,000 rubles and more), the larger the purchase volume, the lower the acquisition costs.

When knitting frames, meshes, as well as when building a foundation, reinforcement is the main element. As for private construction, one of the most popular here is rolled metal with a diameter of 12 millimeters. The favorable ratio of strength and affordable price allows the use of 12 mm reinforcement in the construction of a private house.

Why do you need to know the weight of rolled metal? You need this value to estimate the cost of construction work at different stages. Usually, the weight is already calculated in the project for each structure where A12, A3 or any other brand of metal is used. If you plan to do the calculation of the building yourself, or you just want to understand this moment in detail, then this material will answer all your questions. After studying the article, the reader will be able to independently calculate and find out the weight of the reinforcement 12 mm, A3 or another brand.

The calculation is carried out in running meters - special values ​​​​usually used in construction work. The table also indicates the mass of one linear meter. At the same time, reinforcement is sold by weight, and not by length. The task of the builder is quite simple: to find out how many meters will be required for all structures, and then convert them into units of mass. Below is a detailed and simple table that will help you find out the weight of one linear meter.

In this table, you need to find the desired diameter (D), in this case it is 12 mm. D is indicated in the second column - these data are not particularly needed, and it is quite simple to translate 12 mm (you need to divide 12 mm by 100, as a result you get 0.12 m). The third column of the table is the most important - here the mass m per kg is indicated. A meter of rolled metal 12 millimeters is 0.888 kilograms. Also, for example, you can take 10 mm rods, the weight of which is 0.617 kg. The last column shows how many meters are in one ton.

Calculator

Self-calculation

Now the reader knows how much one meter weighs. But in order to better understand the work, you need to understand how the calculation is carried out. Having understood the essence, the builder will be able to calculate the weight of one linear meter of rods with a diameter of 12 or 10 mm. To perform the calculation, you must proceed according to the following scheme:

The volume of one linear meter can be obtained by the following formula: 1m x (0.785 xD xD). Here is the letter "D" stands for the diameter of the circle. The total mass is multiplied with the specific gravity of the rods, in all cases it will be 7850 kg / m3. To find out how much a meter weighs, you need to know the volume.

For example, you can independently calculate the mass of one meter of reinforcement 10 mm. The first step is to get the volume - 1m x (0.785 x 0.010 x 0.010) = 0.00010124 m3. Weight of rods 10 mm - 00010124 m3 x 7850 = 0.616 kg. If you look at the table, then one meter of reinforcement 10 weighs 0.617 kg. How much a meter of rods weighs 14 or 16 can be found in the same way.

Number of meters in one ton

Above is the calculation for 10 mm. The number of meters per ton can also be calculated without the use of specialized tables. Here it is worth referring to building codes, which say that there should be at least 0.1% of rods in the strip base in relation to the reinforced concrete structure. This wording looks rather complicated. To understand how this works, it is worth examining an example:

1. A tape base is taken, the area of ​​\u200b\u200bwhich is 2400 square cm.
2. Next, you need a coefficient, for this formula it is 0.001.
3. The resulting volume is multiplied with a coefficient - 2400 x 0.001 = 2.4 cm2.
4. At the next stages, it will not be possible to do without background information. Here you will need a manual that indicates the required number of rods. For fittings with a diameter of 10 and 12 mm, two rods are sufficient.

What you need to know about A12 fittings

Steel rods are made, the grade of which depends on the requirements for strength, wear and other parameters. Typically, builders choose rods from low-alloy metal. It cannot be said that this is the most reliable and durable steel, but at the same time it has an important advantage - low-alloy metal can be processed using arc welding.

Grade A12, like rebar with a diameter of 10 mm, is usually used to give strength to a structure made of reinforced concrete. Also, these rods are the main element in the construction of frame structures. In addition to this parameter, you also need to pay attention to rental, it differs by class:

• Periodic profile - A3. Class A3 reinforcement has transverse corrugation.
• Smooth profile - A1. Unlike A3, class A1 fittings come without corrugation.

You can buy fittings, regardless of diameter or class A3, in bays or rods.