GOST R 51285-99

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  ГОСТ Р 51285-99

GOST R 51285−99 twisted wire Mesh with hexagonal cells for gabion constructions. Specifications (with Change No. 1)

GOST R 51285−99

Group В76

STATE STANDARD OF THE RUSSIAN FEDERATION
TWISTED WIRE MESH WITH HEXAGONAL CELLS
FOR MESH STRUCTURES
Specifications
Twisted wire meshes with hexagonal cells for gabion constructions.
Specifications

OKS 77.140.60
77.140.65
AXTU 1275

Date of implementation 2000−01−01

Preface

1 DEVELOPED by the Scientific-production Association (NPO «As») together with the Technical Committee for standardization TC 146 «Hardware"

SUBMITTED by the Technical Committee for standardization TC 146 «Hardware"

2 APPROVED AND put INTO effect by the Resolution of Gosstandart of Russia dated 16 June 1999 No. 191

3 INTRODUCED FOR THE FIRST TIME

4 EDITION with Change No. 1 adopted in January 2003 (IUS 4−2003)

1 Scope

This standard applies to wire twisted wire mesh with hexagonal cells intended for gabion structures, protective barriers and other mesh structures used for Bank stabilization, soil reinforcement, strengthening of slopes and slopes, protection against rockfalls, avalanches, debris flows, etc. (hereinafter — the grid).

2 Normative references

The present standard features references to the following standards:

GOST 380−94 carbon Steel of ordinary quality. Brand

The Wire GOST 3282−74 General purpose low carbon steel. Specifications

GOST 5960−72 PVC Elastron for isolation and protective environments of wires and cables. Specifications

GOST 10446−80 (ISO 6892−84) Wire. Test method tensile

GOST 10447−93 Wire. Method of test for winding

GOST 14192−96 Marking of cargo

GOST 15150−69 Machines, instruments and other technical products. Versions for different climatic areas. Categories, conditions of use, storage and transportation of the impact of climatic factors of the external environment

GOST 24597−81 the packaged goods. Basic parameters and dimensions

GOST 26663−85 transport Packs. Formation with the use of packaging. General technical requirements

GOST R 50575−93 (ISO 7989−88) steel Wire. Requirements for zinc coating and testing methods covering

3 Definitions

In this standard, the definitions given in Appendix A.

4 Classification, basic parameters and dimensions

4.1 Mesh is manufactured from hexagonal cells are mutually twisted (twisted) wires by a method of twisting two wires in one direction for a complete rotation of 180° with a minimum number of twists equal to three.

Scheme of grid cells is shown in figure 1.

Figure 1 — scheme of the hexagonal grid cells

1 — wire edges; 2 — primary wire;  — cell size  — the diagonal size of the cell

Figure 1 — scheme of the hexagonal grid cells

(Changed edition, Rev. N 1).

4.2 Mesh klassificeret the coating of the wire. Requirements for the wire used for the manufacture of nets, is given in Appendix B.

4.3 Main parameters and grid sizes are shown in table 1.


Table 1 — Dimensions and limit deviations of mesh sizes

The cell size		Wire diameter without polymer coating, mm		Diagonal size, mm	Mesh width, mm		Roll length, m
nomin., mm	pred. off %	mesh	edge		nomin.	pred. off.	nomin.	pred. off.
60	+18 -4	2,0	2,4	80	1000 2000 3000 4000	±60	25 50 100	+1 0
60		2,2	2,7
60		2,4	3,0
60		2,7	3,4
80	+16 -4	2,0	2,4	100		±80
Eighty		2,2	2,7
80		2,4	3,0
80		2,5	3,0
80		2,7	3,4
80		2,8	3,9
80		3,0	3,9
100		2,7	3,4	120		±100
100		3,0	3,9
100		3,4	3,9
Notes 1 in the manufacture of wire coated wire diameter increased by 1 mm. 2 By agreement of the parties is allowed to produce a mesh from wire of other diameters. 3 diagonal Size is not controlled by, provided by technological tools.

The nominal cell size is taken for the number grid.

By agreement allowed supply rolls of different lengths and widths, as well as the grid maps. The size of the card coordinate with the consumer.

The theoretical mass of the wire mesh area of 1 m — on Appendix B.

(Changed edition, Rev. N 1).

4.4 (Deleted, Rev. N 1).

Examples of symbols

Grid cell N 80 wire diameter 2.4 mm, coated with zinc:

Mesh 80−2,4-C GOST R 51285−99

A grid cell of 100 N wire diameter 2.7 mm, covered with an alloy of zinc and aluminum and Misch metal:

Mesh 100−2,7-CAM GOST R 51285−99

Grid cell N 60 from wire diameter 2.0 mm, coated with zinc and polymer:

Mesh 60−2,0-CPU GOST R 51285−99

Grid cell N 60 wire diameter 2.2 mm, covered with an alloy of zinc and aluminum and Misch metal and polymer:

Mesh 60−2,2-CAMP GOST R 51285−99

5 Technical requirements

5.1 Mesh made from low carbon heat treated wire of steel grades according to GOST 380, coated with zinc or a zinc alloy with aluminum and mischmetal, zinc, and a polymer alloy of zinc and aluminum and Misch metal and polymer. Requirements for the wire is given in Appendix B.

5.2 In the mesh should not be torn and nesmith wires. Splice into the ends of the wire by extension, twisting or welding.

On the surface of the wire mesh without coating polymer should not be cracking and flaking of the coating. The presence of the powdery peeling of coating in areas of lay is not a rejection symptom.

5.3 Mesh produce one coiled length roll weight 1000 kg net Rolls can be cut into cards.

5.4 In the marking grid to the end of the roll or package must be attached to the label, which indicate:

— trademark and (or) the name of the manufacturer;

— the symbol grid;

the mesh width in millimetres and length in metres;

the total number of mesh in square meters;

— the date of manufacture of the grid;

— number of rolls or cards in the package.

Transport marking grid — according to GOST 14192.

5.5 When packaging a roll of mesh ligated in two places at the ends. Steel coil mesh width of 2 m or more optionally ligated by a spiral wire, covered with zinc or a zinc alloy with aluminum and mischmetal.

Allowed other ways of dressing to ensure the safety of the rolls.

The grid maps formed in the packages. The package should consist of a grid of the same size and type of coating wire. The weight of the package — not more than 1000 kg. Number of meshes in the package specified in the order or determined by the manufacturer. Package tie not less than four places with wire or tape according to regulatory documents.

5.2−5.5 (Revised edition, Edit. N 1).

6 acceptance Rules

6.1 Mesh take parties. The party should consist of a grid of one size and one kind of coverage shall be furnished a document about quality that contains:

— trademark and (or) the name of the manufacturer;

— the symbol grid;

the mesh width in millimetres and length in metres;

the total number of mesh in square meters;

— at the request of the consumer test results of the original wire.

6.2 size and mesh quality choose one roll of 50 or three cards that verify:

the quality of strand;

— the size of the cell;

the diameter of the wire;

— the width and length of the grid.

(Changed edition, Rev. N 1).

6.3 If unsatisfactory test results of at least one indicator, according to him, repeat tests are carried out at twice the number of rolls.

7 control Methods

7.1 the quality of the surface mesh and the quality of lay checked visually in the manufacture of the grid.

7.2 cell Size was measured in three randomly selected areas of the roll of mesh with an accuracy of 1 mm. One of the places of measurement are selected in the middle of the grid, the other two edges at distance at least half of the cell from the edge of the grid.

Each of the measuring sites check the dimensions of 10 consecutive cells.

The cell size () is determined in accordance with figure 1.

7.3 the Length of the mesh is determined using a meter or measure with a ruler. The width of the mesh measured in any place a tape measure or ruler with a scale division of 1 mm.

Allowed length measurement of the mesh in the manufacturing process.

7.1−7.3 (Revised edition, Edit. N 1).

7.4 the diameter of the wire is measured anywhere in the grid to stretch without sagging of the coating measuring instrument with division value of 0.01 mm.

(Added, Rev. N 1).

8 Transportation and storage

8.1 Grid transporterowych rolls or packages according to GOST 24597 and GOST 26663 in the indoor and outdoor means of transport in accordance with cargo carriage regulations applicable to transport of this species. Allowed the railway transportation in open rolling stock packages, that its size cannot be loaded in covered vehicles.

8.2 Storage of the grid — under the terms of 5 GOST 15150.

8.1, 8.2 (Revised edition, Edit. N 1).

Annex a (informative). DEFINITION

APPENDIX A
(reference)

A. 1 Mesh structures — three-dimensional mesh structures of various shapes of wire mesh of twisted hexagonal cells, filled with stone used to protect soil from erosion.

A. 2 Coating alloy of zinc and aluminum and Misch metal — coating of steel wire mesh with a zinc alloy containing 5% aluminum and 0.01% of mischmetal.

A. 3 Mischmetal is an alloy of rare earth metals with predominant content of cerium and lanthanum.

A. 4 the Roll of mesh is rolled up the screen cloth in the form of a cylinder.

A. 5 the Stranding of the wire — lay the two wires in one direction to full rotation of 180° of wire revolve in the same direction, the minimum number of twists is three.

6 A. the cell Size is the distance between the twists, taking account of the size of one strand.

Appendix A. (Revised edition, Edit. N 1).

APPENDIX B (mandatory). REQUIREMENTS FOR THE WIRE USED TO MANUFACTURE MESH

APPENDIX B
(required)

B. 1 Classification, basic parameters and dimensions

Wire for meshes klassificeret by type of coverage:

C — zinc coating;

CAM — alloy coating of zinc and aluminum and Misch metal;

CPU — zinc coating and a polymer;

CAMP — alloy coating of zinc and aluminum and Misch metal and polymer.

The diameters of wire, covered with zinc or alloy of zinc and aluminum and Misch metal, the maximum deviations of the wire is given in table B. 1.


Table B. 1 — wire Diameter and extreme deviations

	In millimeters
The diameter of the wire without coating polymer	Limit deviation
2,0	±0,06
2,2
2,4
2,5
2,7	±0,08
2,8
3,0
3,4	±0,10
3,9
Note — in the manufacture of wire mesh with a polymer coating, the wire diameter increased by 1 mm.

Example of designation wire diameter 2.0 mm, coated with zinc and polymer:

Wire of 2.0-CPU GOST R 50575−93

B. 2 Technical requirements

Wire made of low carbon wire rod of steel grades according to GOST 380.

The tensile strength of the wire gap should be from 35 to 55 kgf/mm(340−540 N/mm) minimum elongation — 12% on basic specimen length of 100 mm.

The zinc coating and alloy coating of zinc and aluminum and Misch metal must be durable and withstand at least five turns when winding, on a cylindrical stem with a diameter, equal to three diameters of wire; solid and uniform, to withstand the number and standards of immersion in a solution of sulphate of copper given in table B. 2.


Table B. 2 — Number and duration of dives, samples of wire

Wire diameter, mm	Number of dives at each dive duration
	1 min	30
2,0	2	-
2,2		1
2,4
2,5
2,7
2,8	3	-
3,0
3,4
3,9

On the surface of the wire coated with zinc or a zinc alloy with aluminum and mischmetal should not be uncovered seats and black spots.

The minimum mass of zinc and alloy of zinc and aluminum and Misch metal per unit of surface area shall conform to the requirements of GOST R 50575 and table B. 3.


Table B. 3 — Minimum coating mass

Wire diameter, mm	Mass of coating, g/m, not less
	zinc	zinc alloy with aluminum and Misch metal
2,0	215	225
2,2	230	240
2,4
2,5	245	255
2,7
2,8	255	265
3,0
3,4	265	275
3,9	275	285

Polymeric coating thickness is 1 mm and the diameter of the wire.

For coating wire with a polymer used polyvinyl chloride plastic (PVC) brand И50−13 according to GOST 5960 or another normative document, a polyethylene grade PE 805−275 [1]; PE ND in other brands, duly approved, without deteriorating the performance of the coating.

B. 1, B. 2. (Changed edition, Rev. N 1).

Wire shall be manufactured in coils or on reels.

B. 3 Rules of acceptance

Wire take parties. The party should consist of wire of the same diameter, the same kind of coverage shall be furnished a document about quality that contains:

— trademark and (or) the name of the manufacturer;

the results of the tests;

— designation of wire;

the weight of the party.

Upon acceptance of the wire diameter and surface quality check on each reel (reel).

To check the mechanical properties and the quality of the coating by the wire select at least three coils (coils).

For testing each selected one sample from each selected winding (coil).

If unsatisfactory test results of at least one of the figures, it is carried out re-tests on twice the number of skeins (coils).

The results of repeated tests apply to the entire party.

B. 4 control Methods

Inspection of the wire surface is carried out visually without the use of magnifying devices.

Wire diameter is measured in two mutually perpendicular directions one section at a stretch without sagging of the coating measuring instrument with division value of 0.01 mm.

Test wire tensile is carried out according to GOST 10446.

The test of wire on the winding is carried out in accordance with the requirements of B. 2 and GOST 10447. The coating is considered satisfactory if, when winding, it does not crack or break to such an extent that it can be removed without the use of mechanical means (using your fingers).

The continuity and uniformity of zinc coating and alloy plating of zinc and aluminum and Misch metal is controlled by immersion GOST R 50575.

The mass of the zinc or alloy of zinc and aluminum and Misch metal determine the weight or volume-gasometrical method according to GOST R 50575. A mass of alloy of zinc and aluminum and Misch metal deposited per unit surface area (), g/m, determined by the formula

,

where  — volume of hydrogen released during the test, cm;

the diameter of the wire without coating, mm;

 — length of sample, mm.

B. 1-B. 4 (Revised edition, Edit. N 1).

B. 5 Marking, transportation and storage

Marking, packaging, transportation and storage of the wire according to GOST 3282, GOST 26663.

ANNEX b (informative). The theoretical mass of the mesh area of 1 sq. m

THE APP
(reference)

Table B. 1 — Theoretical mass grid with an area of 1 m

The diameter of the wire without coating polymer, mm	Weight, kg			The diameter of the wire covered with polymer, mm	Weight, kg
	The number grid				The number grid
	60	80	100		60	80	100
2,0	1,22	1,02	-	3,0	1,40	1,16	-
2,2	Of 1.47	Of 1.23	-	3,2	1,67	1,38	-
2,4	1,75	1,45	-	3,4	1,96	Of 1.61	-
2,5	-	1,60	-	3,5	-	1,77	-
2,7	2,22	1,65	1,38	3.7 V	2,46	1,83	1,53
2,8	-	1,75	-	3,8	-	Of 1.94	-
3,0	-	1,90	1,71	4,0	-	2,10	1,87
3,4	-	-	2,19	4,4	-	-	2,37
Note — the Theoretical mass of the mesh is calculated considering the wire edge.

APPENDIX d (reference). Bibliography

APPENDIX D
(reference)

[1] THE 2243−046−00203521−98 the composition of the medium density polyethylene pipe and fittings of gas distribution networks.

In applications, G (Introduced later, Rev. N 1).