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Specifications of Gabion Product Is in Line the International Standards

Gabion, a double-twisted wire mesh container of variable sizes, uniformly partitioned into internal cells, interconnected with other similar units, and filled with stone at the project site to form flexible, permeable, monolithic structures such as retaining walls, sea wall, channel linings, revetments, and weirs for erosion control projects. (ASTM 975)

We follow the principle of standard production of gabions. Our gabion products and materials are all be produced according to the international standards.

Gabion mesh can be used as (BS EN 10223):

  • Gabion box.
  • Gabion mattress.
  • Sack gabion.
This is the schematic diagram of gabion box.

SPG-1: Gabion box

This is the schematic diagram of gabion mattress.

SPG-2: Gabion mattress

This is the schematic diagram of sack gabion that has three sack gabions.

SPG-3: Sack gabion

Table 1: Typical Gabion Sizes (ASTM 975)
Item Length, m Width, m Height, m Number of Cells, each Volume, m3
GS-1 2 1 1 2 2
GS-2 3 1 1 3 3
GS-3 4 1 1 4 4
GS-4 2 1 0.5 2 1
GS-5 3 1 0.5 3 1.5
GS-6 4 1 0.5 4 2
GS-7 2 1 0.3 2 0.6
GS-8 3 1 0.3 3 0.9
GS-9 4 1 0.3 4 1.2
Table 2: Typical Revet Mattress Sizes (ASTM 975)
Item Length, m Width, m Height, m Number of Cells,
Each
Area, m2
RM-1 3.0 2.0 0.17 3.0 6.0
RM-2 4.0 2.0 0.17 4.0 8.0
RM-3 3.0 2.0 0.23 3.0 6.0
RM-4 4.0 2.0 0.23 4.0 8.0
RM-5 3.0 2.0 0.3 3.0 6.0
RM-6 4.0 2.0 0.3 4.0 8.0

Double-twisted wire gabion and revet mattresses are classified according to coating, as follows (ASTM 975):

  • Style 1, consists of double-twisted wire mesh made from wire which is zinc coated before being double-twisted into mesh. Fasteners, lacing wire, and stiffeners are produced from zinc-coated wire.
  • Style 2, consists of double-twisted wire mesh made from wire which is coated with Zn-5Al-MM before being double-twisted into mesh. Fasteners, lacing wire, and stiffeners are also produced from Zn-5Al-MM coated wire.
  • Style 3, consists of double-twisted mesh, lacing wire, and stiffeners as Style 1 and overcoated with PVC. Fasteners shall be of stainless steel wire.
  • Style 4, consists of double-twisted mesh made from wire which is aluminum-coated before being double-twisted into mesh. Fasteners, lacing wire, and stiffeners are also produced from aluminum-coated wire.
Table 3: Mesh Characteristics
characteristics Gabion Revet Mattresses
Metallic Coated PVC Coated Metallic Coated PVC Coated
Mesh Type 8 by 10 6 by 8
Mesh Opening 83 by 114 mm (3.25 by 4.5 in.) 83 by 114 mm (3.25 by 4.5 in.) 64 by 83 mm (2.5 by 3.25 in.) 64 by 83 mm (2.5 by 3.25 in.)
Mesh wire 3.05 mm (0.120 in.) 2.7 mm (0.106 in.) 2.2 mm (0.087 in.) 2.2 mm (0.087 in.)
Selvedge wire 3.8 mm (0.150 in.) 3.4 mm (0.134 in.) 2.7 mm (0.105 in.) 2.7 mm (0.105 in.)
Lacing wire 2.2 mm (0.087 in.) 2.2 mm (0.087 in.) 2.2 mm (0.087 in.) 2.2 mm (0.087 in.)
Fasteners 3.0 mm (0.118 in.) 3.0 mm (0.118 in.) 3.0 mm (0.118 in.) 3.0 mm (0.118 in.)
Stiffeners:
Using lacing wire
2.2 mm (0.087 in.) 2.2 mm (0.087 in.) 2.2 mm (0.087 in.) 2.2 mm (0.087 in.)
Stiffeners: Preformed 3.8 mm (0.150 in.) 3.4 mm (0.134 in.) N/A N/A
PVC coating
thickness:
Nominal
N/A 0.50 mm (0.02 in.) N/A 0.50 mm (0.02 in.)
PVC coating
thickness: Minimum
N/A 0.38 mm (0.015 in.) N/A 0.38 mm (0.015 in.)
Table 4: Minimum Strength Requirements of Mesh and Connections
Test description Gabions, Metallic Coated Gabion, PVC Coated Revet Mattress Metallic
Coated and PVC Coated
kN/m (lbf/ft) kN/m (lbf/ft) kN/m (lbf/ft)
Parallel to
twist
51.1 (3500) 42.3 (2900) 33.6 (2300)
Perpendicular
to twist
26.3 (1800) 20.4 (1400) 13.1 (900)
Connection to
selvedges
20.4 (1400) 17.5 (1200) 10.2 (700)
Panel to panel
connection
using lacing
wire or
fasteners
20.4 (1400) 17.5 (1200) 10.2 (700)
Punch Test 26.7 (6000) 23.6 (5300) 17.8 (4000)

Surface treatment

  • Galvanized/zinc coated. (ASTM A 641)
    • Zinc coating.
      Zinc coating on the wire is classified in a number of classes. (Class 1, 2, 3, or A, 4, B, 5, C and as "regular coating.")
    • Table 5: Minimum Weight (Mass) of Zinc per Unit Area of Uncoated Wire Surface (SI Units)
      Diameter, mm Class 3 or A Coating, g/m2 Class 4 Coating, g/m2 Class B Coating, g/m2 Class 5 Coating,
      g/m2
      Class C Coating, g/m2
      0.90 137 n/a 275 n/a 412
      1.00 153 n/a 305 n/a 458
      1.20 168 n/a 336 n/a 504
      1.40 183 n/a 366 n/a 549
      1.60 198 n/a 366 n/a 549
      1.80 198 n/a 366 n/a 549
      1.90 214 366 427 610 641
      2.00 214 366 427 610 641
      2.30 229 366 458 610 687
      2.50 244 366 488 610 732
      2.70 244 366 488 610 732
      3.00 259 366 519 610 778
      3.40 259 366 519 610 778
      3.80 275 366 549 610 824
      4.10 275 366 549 610 824
      4.50 275 366 549 610 824
      4.90 305 366 610 610 915
      5.30 305 366 610 610 915
      and larger - - - - -
    • Mechanical properties.
    • Table 6: Tensile Strength for Temper Designation (SI Units) (ASTM A 641)
      Wire Diameter, mm MPa
      Soft Medium Hard
      0.20 to under 2.00 515 max 485 to 690 620 to 825
      2.00 to under 2.50 515 max 485 to 655 585 to 795
      2.50 to under 4.70 485 max 450 to 620 550 to 760
      4.70 and over 485 max 415 to 585 515 to 715
  • Galfan coated.
    • Coating classes. (ASTM A 856)
      Zn-5Al-MM alloy coating on the wire is classified in a number of classes. (1, 3 or A, 60, B, 100, and C)
    • Table 7: Minimum Weight of Zn-5 AL-MM Alloy Coating per Unit Area of Uncoated Wire Surface
      Wire Diameter in. (mm) Class 1
      oz/ft2 (g/m2)
      Class 3 or A Coating, oz/ft2 (g/m2) Class 60 Coating, oz/ft2 (g/m2) Class B Coating, oz/ft2 (g/m2) Class 100 Coating, oz/ft2 (g/m2) Class C Coating, oz/ft2 (g/m2)
      0.035 (0.89) 0.15 (46) 0.45 (137) n/a 0.90 (275) n/a 1.35 (412)
      0.041 (1.04) 0.15 (46) 0.50 (153) n/a 1.00 (305) n/a 1.50 (458)
      0.048 (1.22) 0.15 (46) 0.55 (168) n/a 1.10 (335) n/a 1.65 (503)
      0.054 (1.37) 0.20 (61) 0.60 (183) n/a 1.20 (366) n/a 1.80 (549)
      0.062 (1.57) 0.20 (61) 0.65 (198) n/a 1.20 (366) n/a 1.80 (549)
      0.072 (1.83) 0.20 (61) 0.65 (198) n/a 1.20 (366) n/a 1.80 (549)
      0.076 (1.93) 0.25 (76) 0.70 (214) 60 (183) 1.40 (427) 1.00 (305) 2.10 (641)
      0.080 (2.03) 0.25 (76) 0.70 (214) 60 (183) 1.40 (427) 1.00 (305) 2.10 (641)
      0.092 (2.34) 0.28 (85) 0.75 (229) 60 (183) 1.50 (458) 1.00 (305) 2.25 (686)
      0.099 (2.51) 0.28 (85) 0.80 (244) 60 (183) 1.60 (488) 1.00 (305) 2.40 (732)
      0.106 (2.69) 0.30 (92) 0.80 (244) 60 (183) 1.60 (488) 1.00 (305) 2.40 (732)
      0.120 (3.05) 0.30 (92) 0.85 (259) 60 (183) 1.70 (519) 1.00 (305) 2.55 (778)
      0.135 (3.43) 0.30 (92) 0.85 (259) 60 (183) 1.70 (519) 1.00 (305) 2.55 (778)
      0.148 (3.76) 0.35 (107) 0.90 (275) 60 (183) 1.80 (549) 1.00 (305) 2.70 (824)
      0.162 (4.11) 0.35 (107) 0.90 (275) 60 (183) 1.80 (549) 1.00 (305) 2.70 (824)
      0.177 (4.50) 0.44 (134) 0.90 (275) 60 (183) 1.80 (549) 1.00 (305) 2.70 (824)
      0.192 (4.88) 0.50 (153) 1.00 (305) 60 (183) 2.00 (610) 1.00 (305) 3.00 (915)
      0.207 (5.26) 0.53 (162) 1.00 (305) 60 (183) 2.00 (610) 1.00 (305) 3.00 (915)
      and larger - - - - - -
    • Mechanical properties.
    • Table 8: Tensile Strength for Temper Designation
      Wire Diameter, in. (mm) Soft, ksi (MPa) Medium, ksi (MPa) Hard, ksi (MPa)
      0.035 to 0.080 (0.20 to 2.00) 75 (515), max 70 to 100 (485 to 690) 90 to 120 (820 to 825)
      0.080 to 0.106 (2.00 to 2.50) 75 (515), max 70 to 95 (485 to 655) 85 to 115 (585 to 795)
      0.106 to 0.176 (2.50 to 4.70), incl 70 (485), max 65 to 90 (450 to 620) 80 to 110 (550 to 760)
      Over 0.176 (4.70) 70 (485), max 60 to 85 (415 to 585) 75 to 105 (515 to 725)
  • PVC coated. (ASTM 975)
    The initial properties of PVC coating material shall have a demonstrated ability to conform to the following requirements:
    • Specific gravity: In the range from 1.30 to 1.35.
    • Tensile strength: More than 20.6 MPa.
    • Modulus of elasticity: More than 18.6 MPa.
    • Hardness: between 50 and 60.
    • Brittleness temperature: Not higher than -9 °C.
    • Resistance to abrasion: The percentage of the weight loss shall be less than 12 %
    • Salt spray exposure and ultraviolet light exposure:
      • The PVC shall show no effect after 3000 h of salt spray exposure.
      • The PVC shall show no effect of exposure to ultraviolet light with test exposure of 3000 h in 63 °C.
      • Evaluation of coating after salt spray and ultraviolet exposure test. The PVC coating shall not show cracks nor noticeable change of color, or blisters or splits. In addition, the specific gravity, tensile strength, hardness, and resistance to abrasion shall not change more than 6%, 25% and 10%, respectively, from their initial values.
      • The PVC coating shall not show cracks or breaks after the wires are twisted in the fabrication of the mesh.

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Anping Enzar Metal Products Co., Ltd.
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