• cIS countries:
  • GOST 5781. Hot-rolled steel for reinforced concrete structures,
  • ST STCHM 7-93. Periodic profile rental from reinforcement steel,
  • GOST 10884-94. Steel reinforcement thermomechanically hardened for reinforced concrete structures,
  • GOST R 52544. Rolled reinforcement welded periodic profile of class A500C and B500C for reinforcing reinforced concrete structures;
• Ukraine:
  • DSTU 3760-98. Rental reinforced concrete structures,
  • GOST 10884-94. Steel reinforcement thermomechanically hardened for reinforced concrete structures;
• Eurozone:
  • EN 10080. Steel products for concrete reinforcement. Suitable steel fittings,

as well as specifications designed for certain types of reinforcement rolled products.

Standards STCHM 7-93 and GOST 10884-94 are focused on the manufacture of hot-rolled and thermomechanically hardened fittings of the A500C of the European sample. GOST R 52544-2006 differs from the above standards in that it is unified by the main components with the European standard EN 10080. The standard DSTU 3780 is introduced in Ukraine with the abolition of GOST 5781 and GOST 10884 and regulates the properties of reinforcement rolled smooth and periodic profile with a diameter of 5, 5 to 40 mm.

European standards (EN 10080), unlike guests, for reinforcement rolled, the presence of categories of plasticity are assumed: A, B, C. The classification of reinforcement in the class of strength does not intend.

Estimated formulas

Reinforcement for reinforced concrete structures on DSTU 3760-98

General technical conditions for reinforcement rental are regulated by DSTU 3760-98, introduced in Ukraine with the abolition of GOST 5781-82 and GOST 10884-94. This standard applies to the rental of the reinforcement smooth and periodic profile with a diameter of 5.5 to 40 mm, intended for reinforcing conventional and pre-stressed reinforced concrete structures. DSTU 3760-98 allows the manufacturer's manufacturing with other periodic profiles by agreement with the consumer.

In accordance with DSTU 3760-98, reinforcement (designated by the index A) is divided into classes. Classes are determined depending on the normalized value of the conditional yield strength in MPa.

Rental divided into:

• welded (designated by index C);
• resistant against corrosion cracking under voltage (indicated by index K);
• unless (without an index C);
• unstable against corrosion cracking (without index K).

Armature rental manufactures the following classes:

• A240C with a smooth profile;
• A300C, A400C, A500C, A600, A600C, A600K, A800, A800K and A1000 with a periodic profile.

Table 1. Nominal diameter of reinforcement rolled, the number of meters in tonne, the mass of one rolled rolled meter and permissible mass deviations

Nominal diameter Rental, D H, mm	Number of meters in tons, m	Mass of 1 routing meter of reinforcement, kg
		Settlement value, kg	Permissible deviations,%
5,5	5362	0,1865	± 8.0
6	4505	0,222
8	2534	0,3946
10	1622	0,6165	± 5.0
12	1126	0,8878
14	827,5	1,208
16	633,6	1,578	± 4.5
18	500,6	1,998
20	405,5	2,466
22	335,1	2,984
25	259,5	3,853
28	206,9	4,834
32	158,4	6,313
36	125,2	7,99
40	101,4	9,865

Note. The mass of 1 m of reinforcement is calculated at a density of steel 7850 kg / m 3 and is a reference value.

The standard provides for the manufacture of reinforcement rolled round smooth profile with a diameter of 5.5 to 40 mm and a periodic profile with a nominal diameter of 6.0 to 40 mm. Armature rental is delivered in rods and serpets. The reinforcement rolling of the smooth class A240 profile is manufactured according to GOST 2590 ordinary accuracy.

Fig. 2. Reinforcement of the smooth class A240 class

The reinforcement of the periodic profile must have cross-like protrusion protrusions that should not be connected with longitudinal protrusions. Longitudinal protrusions are not required.

Table 2. Requirements for basic geometric profile size

Geometric profile parameters	Nominal rental diameter, DN, mm	Profile dimensions
Minimum height of transverse protrusions, H, mm	6–18	0.070 D N.
	20–40	0.065 D N.
Step of transverse protrusions, t, mm	6–8	(0.64-0.86) D N
	8–14	(0.55-0.75) D n
	14–40	(0.51-0.69) D n
The angle of inclination, β °	6–40	40–60
The distance between the ends of the transverse protrusions C, not more, mm	6–40	0.25 D N.
Sizes of protrusions, b, h1, b1, mm	6–40	(0.10-0.15) D n

The standard is allowed to manufacture the rental of intermediate sizes and with another view of the periodic profile. Ovality of smooth reinforcement rolled - according to GOST 2590. The oval of the periodic profile (D 1 and D 2 difference) must be no more than 1.2 mm for rolled with a diameter of 6 to 14 mm, not more than 1.6 mm for rolled with a diameter of 16 to 25 mm and no more than 2.4 mm for rolled with a diameter of over 25 mm.

Fig. 3. reinforcing periodic profile without longitudinal protrusions

Fig. 4. Rent a periodic profile with longitudinal protrusions

The reinforcement rolling in the rods are made of dimensional and non-night length. The length of the rods should be in the range from 6 to 12 m.

The standard is regulated by limit deviations along the length of the dimensional rods. They can be from 0 to +100 mm. By agreement of the manufacturer with the consumer, the establishment of other limit deviations is allowed. The curvature of reinforcement rods should not exceed 0.6% of the measured length.

Reinforcement rolling with a diameter of 25 mm class A800:

25 A800 DSTU 3760-98.

Reinforcement rolling with a diameter of 10 mm class A300C welded:

Armature for reinforced concrete structures according to GOST 5781-82

Sort and weight of 1 m rental

Currently, a number of domestic producers of metal products produces reinforcement rental in accordance with GOST 5781-82. GOST 5781-82 canceled on the territory of Ukraine with the introduction of DSTU 3760-98. This standard applies to round hot rolled steel smooth and periodic profiles intended for the reinforcement of conventional and pre-stressed reinforced concrete structures.

Depending on the mechanical properties, the reinforcement steel for this standard is divided into classes AI (A240), A-II (A300), A-III (A400), A-IV (A600), AV (A800), A-VI (A1000) .

The reinforcement steel is made in rods or motges. A-I (A240) reinforcement steel is made by smooth, class A-II (A300), A-III (A400), A-IV (A600), A-V (A800) and A-VI (A1000) - periodic profile. At the request of the consumer, Steel classes A-II (A300), A-III (A400), A-IV (A300) and A-V (A800) are made by smooth.

Basic parameters and dimensions. The nominal diameters of periodic profiles must correspond to the nominal diameters of isometrics on the cross-sectional area of \u200b\u200bsmooth profiles. Limit deviations of the diameter of smooth profiles must correspond to GOST 2590-88 for conventional rolling accuracy.

Table 1. Profile numbers,
Mass of 1 m The length of the reinforcement steel is smooth and periodic
Profile, limit deviations for mass for periodic profiles

Profile number	Mass 1 m profile
	Theoretical, kg.	Limit deviations,%
6	0,222	+9,0/–7,0
8	0,395
10	0,617	+5,0/–6,0
12	0,888
14	1,21
16	1,58	+3,0/–5,0
18	2
20	2,47
22	2,98
25	3,85
28	4,83	+3,0/–5,0
32	6,31	+3,0/–4,0
36	7,99	+3,0/–4,0
40	9,87
45	12,48
50	15,41	+2,0/–4,0
55	18,65
60	22,19
70	30,21
80	39,46

Note.The mass of 1 M of the profile is calculated by nominal sizes at the density of steel, equal to 7850 kg / m 3.

Fig. 1. Class A-II reinforcement steel (A300) in the usual performance

Fig. 2. Reinforcement Steel Class AC-II (AC300) Special Purpose

The reinforcing steel classes of the A-II (A300) and AC-II (AC300) must have protrusions running along the screw lines with the same occasion on both sides of the profile.

Steel classes A-III (A400), A-IV (A600), AV (A800), A-VI (A 1000), both ordinary and special designs should have protrusions on screw lines having a right profile, and On the other - left side.

Fig. 3. Variamatic steel class A-III (A400) and Classes A-IV (A600), A-V (A800), A-VI (A 1000)

Fig. 4. reinforcement steel classes A-IV (A600), A-V (A800), A-VI (A 1000) special purpose

The relative shifts of the screw protrusions on the parties to the profile separated by the longitudinal ribs are not normalized.

Fig. 5. Armature according to GOST 5781-82 ordinary performance

Fig. 6. Armature according to GOST 5781-82 Special execution

Limit deviations of sizes and mass

Table 2. Sizes and limit
Deviations of the size of the reinforcement of ordinary execution

Profile number (nominal Diameter, D H)	d.		h.		d 1.	h 1.	t.	b.	b 1.	r.
	Nom.	Previous Off	Nom.	Previous Off
Dimensions, mm.
6	5,75	+0,3/–0,5	0,5	± 0.25	6,75	0,5	5	0,5	1	0,75
8	7,5		0,75	± 0.25	9	0,75	5	0,75	1,25	1,1
10	9,3		1	± 0.5	11,3	1	7	1	1,5	1,5
12	11		1,25	± 0.5	13,5	1,25	7	1	2	1,9
14	13		1,25	± 0.5	15,5	1,25	7	1	2	1,9
16	15		1,5	± 0.5	18	1,5	8	1,5	2	2,2
18	17		1,5	± 0.5	20	1,5	8	1,5	2	2,2
20	19		1,5	± 0.5	22	1,5	8	1,5	2	2,2
22	21	+0,4/–0,5	1,5	± 0.5	24	1,5	8	1,5	2	2,2
25	24		1,5	± 0.5	27	1,5	8	1,5	2	2,2
28	26,5	+0,4/–0,7	2	± 0.7.	30,5	2	9	1,5	2,5	3
32	30,5		2	± 0.7.	34,5	2	10	2	3	3
36	34,5		2,5	± 0.7.	39,5	2,5	12	2	3	3,5
40	38,5		2,5	± 0.7.	43,5	2,5	12	2	3	3,5
45	43		3	± 0.7.	49	3	15	2,5	3,5	4,5
50	48		3	± 0.7.	54	3	15	2,5	3,5	4,5
55	53	+0,4/–1,0	3	± 1.0	59	3	15	2,5	4	4,5
60	58		3	± 1.0	64	3	15	2,5	4	5
70	68	+0,3/–0,5	3	± 1.0	74	3	15	2,5	4,5	5,5
80	77,5		3	± 1.0	83,5	3	15	2,5	4,5	5,5

Table 3. Sizes and limit
Deviations of the size of the fittings of special design

Nominal diameter, D H, mm	d.		h.		d 1.	h 1.	h R.	h B.	t.	b.	b 1.	r 1.	α, °
	Nom.	Previous Off	Nom.	Previous Off
Dimensions, mm.
10	8,7	+0,3/–0,5	1,6	± 0.5	11,9	1,6	0,6	1	10	0,7	1,5	11	50
12	10,6		1,6		13,8	1,6	0,6	1	10	0,7	2	11
14	12,5		2	+0,65/–0,85	16,5	2	0,8	1,2	12	1	2	12
16	14,2		2,5		19,2	2,5	1	1,5	12	1	2	12
18	16,2		2,5		21,2	2,5	1	1,5	12	1	2	12
20	18,2		2,5		23,2	2,5	1	1,5	12	1	2	12
22	20,3	+0,4/–0,5	2,5		25,3	2,5	1	1,5	12	1	2	12
25	23,3		2,5		28,3	2,5	1	1,5	14	1,2	2	14
28	25,9	+0,4/–0,7	3	+1,0/–1,2	31,9	3	1,2	1,8	14	1,2	2,5	14
32	29,8		3,2		36,2	3,2	1,2	2	16	1,5	3	14
36	33,7		3,5		40,7	3,5	1,5	2	18	1,5	3	19
40	37,6		3,5		44,6	3,5	1,5	2	18	1,5	3	19

The dimensions for which the limit deviations are not installed, are not controlled on the finished profile.

Table 4. Mechanical properties of fittings

Armature class become	Yield strength σ t, MPa, not less	Temporary resistance, σ in, MPa, not less
A-I (A240)	235	373
A-II (A300)	295	490
AC-II (A300)	295	441
A-III (A400)	390	590
A-IV (A600)	590	883
A-V (A800)	785	1030
A-VI (A1000)	980	1230

Marking, Packaging, Transportation

Packaging, marking, transportation and storage - according to DSTU 3058-95 (GOST 7566-94) with add-ons:

• the ends of the rods from the low-alloyed steels of class A-IV (A600) must be painted with red paint, class A-V - red and green, class A-VI (A1000) - red and blue. It is allowed to paint bundles at a distance of 0.5 m from the ends;
• the rods are packaged in bundles weighing up to 15 tons tied with wire or rod. At the request of the consumer, the rods are packaged in bundles weighing up to 3 and 5 tons;
• paint bundles are applied with strips of at least 20 mm wide on the side surface around the circumference (at least 1/2 of the circumference length) at a distance of no more than 500 mm from the end;
• the paints are applied with strips with a width of at least 20 mm across the turns from the outside of the sides;
• the paint is applied to the non-fallen production to the end or on the side surface at a distance of no more than 500 mm from the end;
• on a label attached to each rod binder, the adopted designation of the class of reinforcement steel (for example, A-III) or the conditional designation of the class on the yield strength (A400) is applied.

Legend

Reinforcement steel with a diameter of 20 mm, class A-II (A300):

20 - A-II GOST 5781-82.

Reinforcement steel with a diameter of 18 mm, class A-I (A240):

18 - A-I GOST 5781-82.

In the designation of the Class A-II (A300) rods of a special purpose, the "C" index is added:

Armature Thermomechanically hardened for reinforced concrete structures according to GOST 10884-94

The reinforcement steel for this standard is divided into classes depending on:

• from mechanical properties - class of strength (established by the standard normalized value of the conditional or physical yield strength);
• from operational characteristics - to the weldable (index C), resistant against corrosion cracking (index K).

Reinforcement steel manufactures AT400S classes, AT500C, AT600, AT600C, AT600K, AT800, AT800K, AT1000, AT1000K and AT1200 with a periodic profile according to Figures 1 and 2 or GOST 5781. In terms of the manufacturer with the consumer, reinforcement steel class of the AT800 strength and above is allowed to be made smooth .

Fig. 1. Periodic reinforcement profile according to GOST 10884-94 with a longitudinal protrusion

Fig. 2. Periodic reinforcement profile according to GOST 10884-94 without longitudinal protrusion

Basic parameters and dimensions. Linear density (mass of the rod with a length of 1 m), the limit deviations in size and mass must correspond to the GOST 5781 installed.

Fig. 3. Geometric reinforcement parameters according to GOST 10884-94

The angle between transverse protrusions and the longitudinal axis of the rod β is recommended to be taken equal to 45 °. The specified angle is allowed to take equal to 35 ° to 70 °.

The values \u200b\u200band permissible deviations of size D 2 correspond to the given table for size D 1.

The ovality of the rods (the difference between D 1 and D 2 in one section) should not exceed the sum of the positive and minus limit deviations in size D 1.

The dimensions that the limit deviations are not installed are shown to build a caliber and they are not controlled on the finished box.

Reinforcement steel with a diameter of 10 mm and more manufactured in the form of rods specified in the order length.

The reinforcement steel with diameters of 6 and 8 mm is made in motges. Production of reinforcement classes AT400S, AT500C and AT600C with a diameter of 10 mm is allowed in motges.

The rods make a measured length from 5.3 to 13.5 m. It is allowed to manufacture a measured length of up to 26 m.

Length rods - at the request of the consumer.

The welded reinforcement steel is allowed to supply in the form of rods:

• dimensional length with non-meter segments with a length of at least 2 m in an amount of no more than 15% of the mass of the batch;
• never-length from 6 to 12 m. In the batch of such reinforced steel, the presence of a rods from 3 to 6 m long in the amount of no more than 7% of the mass of the batch is allowed.

Limit deviations of sizes and mass

Table 1. Geometric parameters of thermal reinforcement and their limit deviations, mm

Nominal reinforcement diameter (profile number), DN	d.	h.	d1			t *	b.	b1.	c, not more
		no less	nominal	deviations at accuracy
				normal	increased
6	5,8	0,4	7	+0,8/–1,0	± 0.6	5	0,6	1,0	1,9
8	7,7	0,6	9,3			6	0,8	1,25	2,5
10	9,5	0,8	11,5	+0,9/–1,6		7	1	1,5	3,1
12	11,3	1	13,7			8	1,2	2,0	3,8
14	13,3	1,1	15,9			9	1,4		4,4
16	15,2	1,2	18	+1,2/–1,8	± 0.8.	10	1,6		5
18	17,1	1,3	20,1			11	1,8		5,6
20	19,1	1,4	22,3			12	2		6,3
22	21,1	1,5	24,5			14	2,2		6,9
25	24,1	1,6	27,7			15	2,5		7,9
28	27	1,8	31	+1,7/–2,5	± 1.2.	17	2,8	2,5	8,8
32	30,7	2	35,1			18	3,2	3,0	10
36	34,5	2,3	39,5			19	3,6		11,3
40	38,4	2,5	43,8			20	4		12,5

* Limit deviations are ± 15%.

Laid length deviations

The limit deviations on the length of the rods of dimensional length must comply with the requirements of GOST 5781.

Mechanical properties and chemical composition

Table 2. Norms on the mechanical properties of reinforcement rental

Reinforcement class	Nominal diameters, mm	Electric heating temperature, ° С	Temporary resistance rupture, σ in, MPa	Conditional or physical yield strength, σ 0,2 (σ T), MPa
			no less
AT400.	6–40	-	550	440
AT500	6–40	-	600	500
AT600.	10–40	400	800	600
AT800.	10–32*	400	1000	800
AT1000	10–32	450	1250	1000
AT1200.	10–32	450	1450	1200

Marking, Packaging, Transportation

Fig. 4. Parameters of marking margings of valves according to GOST 10884-94

The reinforcement steel of the periodic profile has labeling class of the strength and manufacturer, applied when it rolling in the form of marking short transverse ribs or points on transverse protrusions.

Table 3. Dimensions of marking signs

Nominal reinforcement diameter (Profile number), mm	Dimensions of marking signs, mm
	h1.	lm	b2.	d3.
6	0,4	2	3	–
8	0,6			4
10	0,8	3
12	1
14	1,1
16	1,2			5
18	1,3	4
20	1,4
22	1,5
25	1,6
28	1,8
32	2			6
36	2,3
40	2,5

Marking short transverse ribs 0.5 mm high, not beyond the overall size of a circle with a diameter D 1, are located on surfaces adjacent to longitudinal ribs.

Marking points with a height equal to the height of transverse protrusions are cone-shaped thickening on transverse protrusions.

The strength class of the reinforcement steel is denoted by the number of transverse protrusions according to Table 4 in the interval T 1 (see Figures 5 (Rolling Marking Scheme) and 4).

Table 4. Marking of the strength class thermomechanically hardened

* For reinforcement steel AT800K diameter of 18-32 mm.

In the absence of rolling marking, the ends of the rods or binders of the reinforcement steel of the appropriate class must be painted with the incisible paint of the following colors:

• AT400C - white; AT800 - green;
• AT500C - white and blue; AT800K - green and red;
• AT600 - yellow; AT1000 - blue;
• AT600C - yellow and white; AT1000K - blue and red;
• AT600K - yellow and red; AT1200 - Black.

The color of the bundles is allowed at a distance of 0.5 m from the ends. The rods are packaged in bundles weighing up to 10 tons tied with wire. At the request of consumers, the rods are packaged in bundles weighing up to 3 tons. When delivered in the MOTKi, each motor must consist of one segment of reinforcement steel. The mass of the Motion is up to 3 tons. Motok must be evenly tied around the circle at least in four places. Each of these mating must have an intermediate screed (mating), which is located at the level of the middle thickness of the macs. To each motor or bundle of rods, a shortcut is firmly attached to: indicate:

• trademark or trademark and the name of the manufacturer;
• conditional designation of reinforcement steel;
• party number;
• stamp Technical Control.

If the mechanical properties of the reinforcement steel marking applied during its rolling, the actual strength class should be specified on the label and in the quality document, and the ends of the rods must be painted in accordance with the above marking rules.

Transportation and storage - according to DSTU 3058-95 (GOST 7566-94).

Legend

The designation of reinforcement steel must contain (according to GOST 10884-94):

• nominal diameter (profile number), mm;
• designation class of strength;
• the designation of its operational characteristics is weldability (C), resistance to corrosion cracking (index K).

Reinforcement steel with a diameter of 20 mm, class of strength AT800:

20 AT800 GOST 10884-94.

The same, with a diameter of 10 mm, the class of strength AT400, welded (C):

10 AT400S GOST 10884-94.

The same, diameter of 16 mm, class of strength AT600, resistant against corrosion cracking (K):

Rental reinforced manifiable periodic profile of class A500C and B500C for reinforcement of reinforced concrete structures according to GOST R 52544

Terms and Definitions. This standard applies the following terms with the corresponding definitions:

• periodic profile reinforcement - rods, with evenly located on their surface at an angle to their longitudinal axis by transverse edges to improve adhesion with concrete;
• reinforcement rolling of nominal diameter DN, mm - reinforcement, the actual diameter of which D, taking into account the permissible deviations, corresponds to the diameter from the sorting in Table 1;
• D, mm - the diameter of isometric on the area of \u200b\u200ba round smooth rod with a length of 1 m with the same mass as the rental of a periodic profile, determined by the formula:

,

where m is the mass of rolled periodic profile, L is the length of rolled periodic profile, mm;

Classification and sorting. Armature rental divided:

• by the method of production in classes:
  • A500C is hot-rolled without subsequent processing or thermomechanically strengthened rolling stream;
  • B500C - mechanically strengthened in cold condition (cold-deformed);
• by type of products:
  • rods;
  • motions.

In the designation of the class: a - hot-rolled or thermomechanically strengthened reinforcement; B is cold-deformed reinforcement; C - welded; 500 - yield strength of at least 500 MPa.

The nominal diameter, the cross-sectional area and the mass of 1 m of the length of the rolled should correspond to the values \u200b\u200bshown in Table 1.

Table 1. Nominal diameter,
cross-sectional area and weight of 1 m

Nominal diameter D H, mm	Nominal Square cross section F H, mm 2	Nominal mass 1 m long rolling length, kg
4	12,6	0,099
5	19,6	0,154
6	28,3	0,222
8	50,3	0,395
10	78,5	0,616
12	113,1	0,888
14	153,9	1,208
16	201,1	1,578
18	254,5	1,998
20	314,2	2,466
22	380,1	2,984
25	490,9	3,853
28	615,8	4,834
32	804,2	6,313
36	1017,9	7,990
40	1256,6	9,865

Note. At the request of the consumer, the reinforcement rolling is made with a nominal diameter: 4.5; 5.5; 6.5; 7; 7.5; 8.5; nine; 9.5; 45; 50 mm.

The nominal mass of 1 m of the hire length is determined, based on the nominal diameter at the density of steel, equal to 7850 kg / m 3.

The periodic profile of reinforcement rolled should consist of at least two rows of transverse ribs having a sickle shape and not connecting with longitudinal ribs. It is allowed to supply rebar without longitudinal ribs.

The values \u200b\u200bof the parameters of the periodic profile and its relative crumple area F K must correspond to Table 2.

Table 2. Periodic profile parameter values

Name of the parameter of the periodic profile	Value for class rental
	A500S.	B500s.
Nominal diameter, mm	6–40	4–12
Allowable deviation from the nominal cross-sectional area and mass of 1 m length of the profile,%, for rolled with a diameter, mm:
up to 5.5	-	± 45.
from 5.5 to 8 included.	± 8.	± 4.5
from 8.5 to 14 included.	± 5.	± 4.5
from 16 to 40 included.	± 4.	-
The relative area of \u200b\u200bcrushing FK transverse ribs profile, no less, for diameter, mm:
up to 4 included	0,036
from 4.5 to 6 included.	0,039
from 6.5 to 8 included.	0,045
from 8.5 to 10 included.	0,052
from 10.5 to 40 included.	0,056
Height of transverse ribs H, mm	(0.065-0.1) D n	(0.05 - 0.1) D n
Pitch of transverse ribs T, mm	(0.4-1.0) D n
Relative transverse ribs T / B, not less	-	3
The angle of inclination of transverse ribs β	35-60 °
The angle of inclination of the side surface of the edge α, not more than	45 °
The total distance between the ends of the transverse edges σe i, mm, not more than	0.2 π D n	0.25 π D n
Ovality of reinforcement rolled, mm, no more, for diameter, mm:
up to 5.5 included.	-	0,5
from 6 to 14 included.	1,2	1
from 16 to 25 included.	1,6	-
from 28 to 40 included.	2,4	-

For hot-rolled and thermomechanically hardened reinforcement rolled, the configuration of the periodic profile must correspond to Figure 1 and Table 1, and for cold-deformed rolled products - Figure 2 and general requirements for the profile (see Table 2).

In coordination with the consumer, it is allowed to supply fittings with a different configuration of the periodic profile, subject to the compliance of the properties of the rolling with the requirements of this standard.

Armature rolling is made with a nominal diameter:

• up to 6 mm - in motges;
• from 6 to 12 mm inclusive - in motges or rods;
• 14 mm and over - in the rods.

Rods manufactures:

• measuring length (MD) ranging from 6 to 12 m, agreed by the consumer in the order;
• non-length (ND) ranging from 6 to 12 m, determined by the manufacturer. In the batch of numeric rods, the presence of rods from 3 to 6 m long in the amount of no more than 7% of the mass of the party is allowed.

Limit deviations on the length of the rods of measuring length - plus 100 mm.

The curvature of the rods should not exceed 0.6% of the measured length.