12 mm reinforcement: how much it weighs, features, calculations

Characteristics of metal rods A12

Reinforcement with a cross-section of 12 mm is in greatest demand due to its convenience and lightness. And when knitting frames, the necessary rigidity of the product appears. When constructing country brick houses, a strip foundation is used, the construction technology of which requires the use of reinforcement with a small diameter. In such cases, twelve-millimeter rods are most suitable.

Characteristics of 12 mm reinforcement

During the production of reinforcing bars marked “A12”, GOST 5781-82 is complied with. The characteristics of A12 reinforcement according to their intended purpose are divided into prestressed and non-prestressed. Depending on the specifics of the technological process, products are classified into the following types:

Types of fittings depending on manufacturing technology

• cold-drawn – reinforcing wire intended for the manufacture of reinforced mesh;
• hot-rolled – steel rods with a round cross-section, used for reinforcing structures.

Such products are made from different types of steel, the choice of which depends on the requirements and application of the future product. Reinforcement with a diameter of 12 mm is found with a smooth profile, which corresponds to class A1, and with a corrugated surface, corresponding to the A3 marking. Rolled metal is supplied by manufacturers in rods or coils.

Characteristics and production technology of A3

This type of reinforcement is manufactured using the following methods:

1. reinforced by hood;
2. hot rolled;
3. thermally strengthened.

These rods are produced in unmeasured and measured sizes. The measured length consists of rods of 6 m and 11.7 m, and the unmeasured length is any piece of reinforcement up to 11.7 meters, but no more. The permissible percentage of unmeasured length in a batch is 10.

Today, the production of reinforcement is one of the main areas of modern metal rolling. This popularity is due to the fact that reinforcement is most often used in the construction industry. The weight of the A3 reinforcement also allows for framing work. The manufacturing process includes the following steps:

• reception and transportation of steel;
• editing;
• cleaning;
• cutting;
• flexible;
• welding meshes and frames, if necessary.

At large enterprises, production is fully automated, while small manufacturers work manually. Due to different labor costs, product costs may vary. Typically, the workshop has two lines where reinforcement is manufactured - for coils and rods. Finished products are stored on special racks in compliance with the required standards.

Scope of application of reinforcing bars

Twelvemm rebar is widely used in the following areas:

Application of 12 mm reinforcement in construction

• frame-monolithic construction;
• installation of support frames;
• reinforcement of concrete structures;
• installation of canopies and stairs.

Metal rods can also be used as an anchor when pouring a columnar foundation. Rolled metal 12 mm is used to overcome deformation, form the basis of the frame, and connect individual elements, including those with a transverse arrangement.

Production of fittings

Reinforcement is used in construction, helps strengthen concrete structures, and takes on most of the load. It improves the quality of concrete. Divided into clamps and mounting fittings.

Piece reinforcement consists of several rods in the form of a rod. She can be tough. It is produced by welding. Welding takes place at the concreting site. The reinforcement is combined into a single frame, which includes a certain number of elements. Such reinforcement is used if there is no large scope of work. It is not used for large construction projects.

Reinforcing mesh - rods connected to each other by viscous. Suitable for slabs.

In addition to steel, there are non-metallic fittings. It can be round, smooth or ribbed. Transverse or longitudinal. The following equipment is used for the manufacture of fittings:

⦁ Apparatus for cooling ingots

⦁ Crystallizer

⦁ Separating bucket

⦁ Furnaces that melt metal

⦁ Scissors cutting steel

⦁ Gas ovens

Weight per meter

The weight of reinforcement products is influenced by various factors, among which the most significant are the following:

Design cross-sectional areas of reinforcement

• diameter of the metal rod;
• surface type – smooth or with transverse corrugation;
• metal class.

Russian specialists use specially designed tables to calculate the weight of metal products, the basis of which is GOST R-52544. In accordance with this State Standard, the weight of a linear meter of reinforcement 12 is 0.888 kg.

Without using special tables, calculating the weight of the reinforcement will not be difficult. Weight is equal to the volume of the body multiplied by the average specific gravity. Volume is calculated by the formula: cross-sectional area multiplied by length. According to standards, the unit of measurement is the meter.

Thus, cross-sectional area = Pi * radius squared (radius is equal to half the diameter). S = 3.14x0.0062 = 0.00011304. Accordingly, weight = 0.00011304x7850 = 0.8874 , where 7850 is the standard indicator of the average specific gravity of twelve-millimeter reinforcement.

If you have access to the Internet at hand, then calculating the mass of 1 meter 12 mm of reinforcement is even easier, using special calculators that allow you to calculate reinforcing products of any brand and thickness.

How much does a meter of reinforcement with a diameter of 12 mm weigh?

Knowing 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 a future building structure. This value is standardized and varies depending on the cross-section of the rods. The minimum grade for prestressing and load-bearing elements made of concrete is corrugated reinforcement with a diameter of 12 mm, as a result, it is the most in demand. The scope of application includes road construction, production of reinforced concrete products (including piece goods), 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 standardized 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; basic formulas relating mass, specific gravity and dimensions are used for calculation:

Mp.m.=V·ρ, where:

• V is the volume of one linear meter, obtained by multiplying the cross-sectional area of ​​the rod (3.1415·D^2/4) by its length (in our case - 1 m). For fittings with a diameter of 12 mm V=0.000113 m3;
• ρ – steel density, standard value is 7850 kg/m3. Thus, one l.m. with a diameter of 12 mm it weighs 0.888 kg.

The specified formula is also used to determine the total length of the purchased reinforcement, taking into account its weight. 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 regulating the minimum permissible proportion of longitudinally placed reinforcement in reinforced concrete products; for example, for a monolithic foundation strip it is 0.1% of the cross-sectional area. In general, the percentage of steel in reinforced concrete products is quite small, but taking into account the fact that its specific gravity exceeds the density of concrete at least three times, the total mass of the frame or mesh needs to be known and taken into account.

An important nuance: the actual weight of 1 meter 12 mm of 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 and differences in the sizes of the ribs, the deviation varies from 0.2 to 3% in both directions.

When purchasing rods with a fixed length individually (in small batches), this fact does not play a special role, but when ordering in bulk, you need to double-check how much the 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 characteristics taken into account

In addition to knowing the weight and footage of reinforcement in one ton, when choosing, pay attention to the following indicators:

• Parameters of the ribs 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 sections).
• Type of rolled products - to strengthen concrete building structures, hot-rolled bars are required (read about the types of reinforcing bars).
• Type of steel, its yield strength, admissibility of use in welding joints.
• Temporary tensile strength.
• The amount of relative elongation (within 14%).

Of all the classes offered in private and residential construction, A3 reinforcement made of A400 or A500C steel is most in demand. The latter is the cheapest to build due to the reduced content of alloy 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/l.m), it is recommended for strengthening particularly stressed structures; the connection of the rods to each other is carried out exclusively by viscous.

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

The cost of one meter of 12 mm reinforcement 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 above), the larger the purchase volume, the lower the acquisition costs.

How many meters of twelve-millimeter reinforcement in one ton

The tables, developed taking into account GOST for fittings, provide the following data on the number of meters contained in a ton of rolled metal:

Number of meters of reinforcement per ton

• diameter 5 millimeters - 5347 meters;
• 6 mm – 4504 m;
• 8 – 2531;
• 10 – 1620;
• 12 – 1126;
• 14 – 826;
• 16 – 633.

From the excerpt of the table values ​​it is clear that one ton contains 1126 meters of reinforcement with a cross-section of 12 mm. Standardized indicators are aimed at facilitating the process of calculating the number of reinforcing bars required to create various types of foundations or other structures.

Weight of corrugated steel reinforcement A3

Table for calculating the weight of corrugated steel reinforcement A3

In accordance with the requirements of GOST 5781-82.

Metal warehouse "Aksvil" sells wholesale and retail:

The first supplier of fittings. Low wholesale and retail prices. Selection consultation. Place an order on the website and in the office. Cut to size. Delivery throughout Belarus, including on weekends.

Theoretical weight, specific gravity of 1 linear meter of steel corrugated reinforcement A3 (A500C / S500)

How much does A3 A500C / S500 corrugated steel reinforcement weigh? How to calculate the weight of reinforcement? How to convert linear meters to kilograms and tons? You will find answers to these questions in the table above for calculating the weight of reinforcement depending on the diameter. Weight of reinforcement, theoretical specific gravity of 1 linear meter of reinforcement, number of meters of reinforcement in 1 ton.

On the website of the Aksvil metal warehouse you can buy fittings in Minsk wholesale and retail.

Advantages of 12 mm reinforcement

Twelve-millimeter metal products have a number of advantages, manifested in the following areas:

Laying reinforcement in the future foundation

• high level of strength of frames made using reinforcing bars;
• sufficient plasticity of the material;
• minimal risk of corrosion damage;
• high degree of resistance to influences such as chemical, thermal, mechanical;
• wide possibilities for various frame configurations;
• use in stressed reinforced concrete structures.

The results of calculations carried out using tables, formulas and calculators are average values, since in reality reinforcing bars do not have a perfectly round cross-section. The data obtained will be sufficient to determine the required quantity of rolled metal.

An important point in calculations is the fact that the calculated and actual weight of 12 mm reinforcement may differ from each other. Despite the careful control of GOST, metal rods are made from different types of steel and with different surfaces, and therefore the deviation of values ​​varies in the range of 0.2–3%.

Classification of fittings GOST R-52544-2006

Why do you need to calculate the mass of rolled products?

Finding out the weight of rolled metal is required in different cases. This, for example, is done when estimating the price of construction work at various stages of construction. It is often necessary to determine how much 12 mm reinforcement weighs per meter. This type of rental is one of the most common among private developers. It has the best balance of cost and durability. Now buy 12 mm reinforcement with delivery to Moscow at a particularly favorable price on our website.
The products can be used for the construction of private mansions, country houses and other buildings. Due to the prevalence of rods with a diameter of twelve millimeters, in this article we will talk specifically about these reinforcing bars. Namely, how to find out their mass (the weight of the reinforcement is 12 mm per meter) and why such an indicator is needed.

Briefly about reinforcing bars

Twelve millimeter steel rods have a main purpose of increasing the strength of reinforced concrete building structures. Using the material, they tie piles, strengthen the foundations of buildings, etc. The product is made from low-alloy metal (steel). This material has good resistance to wear, it has high strength indicators and a lot of other positive properties. Metal rods are available in different classes. The product can be corrugated (class A3) or non-corrugated, i.e. smooth (class A1).

We recommend: Wooden floor in the garage: construction technology