Armature: the weight and length, calculations in construction jobs

Armature: the weight and length, calculations in construction jobs

In capital construction of country houses from monolith not to do without the reinforced designs. At the same time the majority of expenses in the course of acquisition of materials generally are the share of armature. The material weight calculated precisely and correctly will help to be realistic not only about expenses on the organization of construction jobs, but also important part of cost of all object.

Need of calculations of weight of armature: tables of correspondences of weight and lengths

Armature – the building material representing set of certain metal elements, intended for construction of monolithic construction with cement slurry. Serves as support for deduction of pulling stress and for the purpose of strengthening of concrete construction in compression zone.

Reinforcing components are generally applied in construction of the base and wall construction of buildings of the concrete monolith. Considerable part of time, forces and material expenses at construction of the building from concrete is the share of creation of reinforcement cage which is made of the reinforced rods and grids. In order to avoid excess expenses it is necessary to calculate necessary amount of material most precisely. Here not to do without knowledge of weight of armature in meter. The table of ratios of weight and length of different types of designs will help to make the correct calculations.

To calculate armature weight, it is necessary to put the total length of all rods and to increase it by weight of one meter. All necessary data, taking into account class of steel and diameter of rods, provide in calculation tables. In attention the grade of material from which make armature also undertakes.

Table of mass of armature: quality of goods

The indicator of the standard of mass of armature of the corresponding diameter is regulated by the developed standards.

Having studied the table, it is possible to notice one pattern. The indicator of diameter of armature is higher, the material meter weight is more. Total length in one ton, on the contrary, is inversely proportional to thickness of rods.

Helpful advice! The size of diameter needs to be learned from the producer. If to measure it independently, then it will cause errors in calculations as the surface of reinforcing rods has ridge structure.

Thus, knowing armature weight, it is easy to calculate coefficient of the general reinforced design, it is possible to determine the mass of armature in relation to necessary volumes of concrete. Having available these data, it is simple to calculate total quantity of materials which will be required for construction of specific design – whether it be the base or the monolithic building. The quantity of material consumption is made from calculations on concrete cubic meter.

Specific weight of armature: tables of correspondence taking into account running metric area

The running meter of rod of profile is piece of material one meter long. It can have both smooth, and relief surface. The mass of rods, respectively, regulates their diameter. Periodic steel is taken as basis of material.

The mass of grid from reinforcing wire for plaster, reinforcement cage for the base from steel concrete, armored lattice under brick laying depends on dimensions of cloth, the area of cells and diameter of rods in millimeters. The reinforcement steel which is released in the domestic market widely is used in construction, differs in high-quality characteristics, conforms to all requirements of metal rolling.

Calculations carry out with use of the provided table of armature. The weight of 1 running meter depends on the external structure of profile which is corrugated or smooth. Availability of edges and corrugations outside provides more reliable coupling of rods with concrete solution. Thus, the concrete construction in that case has higher qualitative characteristics.

Features of production process of production of reinforcement steel define all range of armature. On such indicators steel is hot-rolled rod or cold-drawn wire.

Material marking, weight of 1 meter: table of range

If to take as basis mechanical characteristics of reinforcement steel, such as durability and weight, then material is subdivided into separate classes of range with the corresponding special designations from A-I to A-VI. At the same time the weight of meter of armature of hot-rolled steel does not depend on them.

If to take, for example, class A-armature ІІІ, then it is used for strengthening of basis of the buildings from concrete built in short terms. The mass of armature in this case is equal to the weight of all framework from steel, including the base, walls and floors and also mass of the welded grids which are filled in by concrete.

Diameter of reinforcing rod in the range from 8 to 25 mm is considered the most popular size of profiles in the construction market. All domestic armature before hit on scrap metal dealers passes quality control stages that guarantees its compliance to norms.

Reference! The volume of steel rod is calculated by multiplication of metric area by geometrical area of circle – 3.14DD/4. D – it is diameter. Specific weight of armature – 7850 kg/m ³. If to increase it by volume, then the general indicator of the unit weight of one meter of armature will turn out.

Armature: weight and different options of its calculation

The weight of armature is calculated in the different ways:

  • by data about normative weight;
  • having taken unit weight as basis;
  • with use of the online calculator.

Necessary quantity of rods determine by normative weight with use of the stated above table of weight in the ratio with running meter. It is the simplest option of calculation. For example we will calculate the weight of armature 14.

The main condition of carrying out such calculations – availability of the corresponding table. Process of calculation (when scheduling construction, considering construction of mesh reinforcement) includes such stages:

  • to choose the corresponding diameter of rods;
  • to calculate the metric area of the required armature;
  • to increase the weight of one meter of armature of the corresponding diameter by quantity of necessary rods.

For example, for building it is supposed to use 2300 meters of armature 14. The weight of 1 meter of rods is 1.21 kg. We carry out calculation: 2300*1.21=2783 kilograms. Thus, performance of this amount of works will require 2 tons 783 kilograms of steel rods. Similarly the quantity of rods of the corresponding diameter in one ton is calculated. Data come from the table.

Calculations on unit weight on the example of calculation of weight of meter of armature 12

The way of calculations for unit weight demands special abilities and knowledge. In its basis the formula of determination of weight with use of such sizes as the volume of subject and its specific weight is put. It is the most difficult and labor-consuming option of calculation of weight. It is applicable only when on hand there is no table with norms and opportunity to use the online calculator is excluded.

Visually it is possible to consider these calculations on the example of determination of the weight of 1 meter of armature of 12 mm. For a start it is necessary to remember formula of calculation of weight from course of physics according to which weight is equal to the subject volume increased by its density, that is specific weight. At steel this indicator corresponds to 7850 kg/m ³.

Volume is defined independently taking into account that the rod of armature has cylindricity. In this case knowledge of geometry will be useful. The formula says: cylinder capacity is calculated by multiplication of section of the square at figure height. In cylinder section is circle. Its area is calculated on other formula where the constant number of Pi with value 3.14 is multiplied by radius in square. Radius is, as we know, half of diameter.

Armature: the weight and length, calculations in construction jobs

Procedure of payments of weight of armature of 12 mm for meter, lengths of all rod

Diameter of reinforcing rods undertakes from plans and calculations of building. Independently it is better not to measure it in order to avoid errors. We define how many one meter of armature of 12 mm weighs. Thus, we receive that radius is equal 6 mm or 0.006 m.

Helpful advice! The easiest way of calculations – use of special programs (or the online calculator). For this purpose enter this mass of armature in tons into certain cells, number of the corresponding profile and length of rod in millimeters. Standard length of rods – 6000 or 12000 mm.

The sequence of independent calculations with use of formula following:

  1. Determination of area of circle: 3.140.006 ²=0.00011304 m ².
  2. Calculation of volume of meter of rods: 0.000113041=0.00011304 m ³.
  3. Calculation of weight of armature 12 in 1 meter: 0.00011304 m ³*7850 kg/m ³=0.887 kg.

If to verify the received result with the table, then we will find compliance of data to state standards. If it is necessary to calculate the mass of specific rod, then area of circle is multiplied by its length. In general algorithm of calculations similar.

The full order of carrying out calculations of the weight of 1 meter of armature 12 provided by mathematical expression will look thus:

  • 1 m * (3.140.012m0.012m/4) *7850kg/m ³=0.887 kg.

The result is identical to previous. Depending on armature length the corresponding value is substituted in formula and on it calculate weight. It is possible to calculate the weight of all grid by multiplication of the value received for 1 m ² by the necessary number of square meters in reinforcement cage.

Calculation of weight of reinforcing wire in square meter

It is possible to calculate weight for specific case on the following algorithm. To determine the weight of hundred meters of reinforcing wire with a diameter of 4 mm, it is necessary to increase specific weight by metric area.

Calculation will look as follows:

  • 92*100 = 9200 g (or 9 kg 200 g).

It is possible to carry out also the return calculation. For example, the hank of wire with a diameter of 4 mm weighs 10 kg. To determine metric area, it is necessary to separate lump into specific weight. Calculation has such appearance: 10/0.092 = 108.69 meters.

For calculation of weight of mesh reinforcement the next ways are used. For example, the grid sizes – 50х50х4. The area of square meter includes 18 rods on 1 m. Thus, only 18 m of armature 6 which weight is 0.222 kg/m turn out. The running meter of wire in design is calculated thus: 18*0.222=3.996 kg/m ². It is necessary to add about 1%, considering error when welding. Let’s receive full 4 kilograms.

Characteristics, sizes and calculation of weight of armature of 8 mm for meter

Reinforcing rods with a diameter of 8 mm are considered as thin. At first sight, they remind simple wire. The surface of armature 8 is corrugated or smooth.

Helpful advice! At any calculations and calculations of mass of armature it is worth to remember about admissible indications of errors. They fluctuate in the range from 1 to 6%. Especially it is important to consider it at expected large volumes of welding.

Main technical characteristics of material following:

  • for production use steel with marking 25G2S and 35GS;
  • ridge step – A400 and A500;
  • A3 armature class.

The weight of rods of 8 mm for meter is most appropriate in places where excessive weight is inadmissible, but additional durability is necessary. The weight of 1 meter of armature 8 is equal to 394.6 grams. In ton the amount of material will be 2,534.2 m.

The weight of 1 meter of armature of 8 mm is calculated by the above-stated formula using value of specific weight of the corresponding steel:

1 m * (3.140.008m0.008m/4) *7850kg/m3=0,394 kg. Such value of weight of armature 8 is given in the table of correspondences of weight and length of armature.

Scope of application and calculation of weight of armature of 10 mm for meter

The rod with a diameter of 10 millimeters is considered one of the most popular in construction. Such armature, as well as rods of other thickness, is made in the hot-rolled or cold-rolled way. These are metal rods of average thickness with durability large-scale.

It is quite simple to calculate the total weight of armature 10: it is enough to sum up total length and to increase it by the mass of running meter of material. Necessary data can be found in the general table.

General characteristics of armature 10 following:

  • diameter of rod – 10 mm;
  • in one ton there are 1622 m of rolling;
  • the weight of 1 meter of armature of 10 mm – 616.5 g;
  • the admissible error when calculating weight makes +6%;
  • classes became, metal production of this type used in production: At-400, At-500C, At-600, At-600K, At-800K, At-1000, At-1000K, At-1200.

Having the specified parameters, it is possible to learn easily necessary amount and weight of construction material. It is rather simple to make independent calculation for already knurled formula, it will look as follows:

1 m * (3.140.01m0.01m/4) *7850 kg/m ³=0.617 kg. 10 the table of ratio of diameter and weight of one meter contains similar indicator of the weight of 1 meter of armature.

Universal features and ideal weight of armature 12

Armature with a diameter of 12 mm by right is considered the most popular in the field of metal rolling and the most demanded. Its dimensions are the most optimum in different types of construction jobs. In this armature such qualities as durability, flexibility and quite low weight wonderfully are combined. At the same time it possesses large-scale of coupling with concrete. Reinforcement cages and designs with its application serve very long time. They practically do not give in to destruction. Armature 12 is recommended by standards of construction for construction of continuous footing for cottages and owner-occupied dwellings.

Characteristics of armature 12:

  • diameter of rod – 12 mm;
  • in one ton there are 1126 m of rolling;
  • ovality of rod – no more than 1.2 mm;
  • step of cross ledges – from 0.55 to 0.75 * dH;
  • the weight of 1 meter is 887.8 g;
  • rolling length – from 6 to 12 m.

Admission is possible only upwards and no more than 10 cm, and the curvature should not exceed indicator of 0.6%.

Important! Each type of armature has the features, and unreliable large diameter guarantees good durability. Same concerns also weight. Armature 20, for example, is more vulnerable to impact of corrosion, but it is ideal for welding. Therefore material selection is individual.

On armature 12 example of calculation of weight of running meter of product has been reviewed. The carried-out calculations have matched given tables of weight of armature for meter of 12 mm. This indicator in all cases was 887.8 g.

The weight of armature is 16 mm for meter: features and technical characteristics

Armature 16 belongs to discharge of high-quality metal rolling. The weight and quality of material provide its reliability therefore builders characterize it as strong, reliable, wearproof and eco-friendly. Besides, it is available at the price and is convenient in mounting and also is applied in other spheres of production.

Most often armature 16 is used for high-quality reinforcing of concrete construction. It maintains high loads of flexibility and extension, distributing it evenly on all surface. 16-millimeter rods in arrangement of the welded metalwork, reinforcing of concrete constructions, road construction, bridges, flights are widely used. In production use quality steel.

Main characteristics following:

  • smooth and corrugated type of profile;
  • in production steel of brands is applied: 35GS, 25G2S, 32g2rps, A400;
  • the weight of 1 meter of armature of 16 mm – 1580;
  • the area of diameter – 2.010 cm ²;
  • length of rods – from 2 to 12 m.

According to the carried-out calculations, by analogy with the previous brands of fittings and according to the table of ratio of diameter and weight of one meter the weight of armature 16 is equal in 1 meter to 1.580 kg.

The weight of armature needs to be known on projecting phase of construction object. The correct calculations will help with drawing up the estimate and will allow to avoid excess costs of materials. Thus, having unmistakably calculated the weight and metric area of reinforcing rods, it is possible to save considerably in the course of building and, on the contrary, to avoid lack of rods already at stage of construction of the reinforced design.

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