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Gabions - double twisted mesh |
Gabions basket |
GABIONS（gabion basket）consist of rectangular units, fabricated from a double-twisted hexagonal mesh. Filled with stones, gabions become large, flexible and permeable elements from which a broad range of structures may be built. Gabions and mattresses are widely used for hydraulic and geo- technical control such as retaining walls, riverbank protections, weirs, channel linings etc.
GABIONS（gabion basket）are divided into cells with diaphragms (usually spaced at 1 meter or 3’ intervals), whose function is to reinforce the structure. The mesh (except for the diaphragms) is reinforced on all edges with wires of a larger diameter to strengthen the gabions and facilitate the assembly and installation.
Lacing and bracing wire is the wire used to assemble and join the gabion units.
Connecting wires are the internal wires used to prevent the gabions from bulging during filling.
INTERNATIONAL STANDARD TO FOLLOW:
ASTM 975 standard:
Style 1 galvanzied wire as per ASTM A 641, class 3 soft temper
Style 2 style 1 and overcoated with PVC
Style 3 Zn-5Al-MM coated wire as per ASTM A 856
EN 10223-3 standard:
Galvanzied wire meets EN 10244-2 and old BS 443
Tensile strength between 380N/mm2 and 550N/mm2 according to BS 1052.
TOLERANCES:
On the hexagonal, double-twisted wire mesh opening shall not exceed ±10% on the nominal dimension
D values (see figure), as follows:
Mesh Type |
Nominal Dimension D Values |
8 x 10 |
83mm (3.25 in.) |
Table 1 mesh characteristics
Characteristics |
Gabion |
Metallic coated |
PVC coated |
Mesh type opening |
8 by 10 83 by 114 mm(3.25 by 4.5 in.) |
8 by 10 83 by 114 mm(3.25 by 4.5 in.) |
Mesh wire |
2.4/2.7/3.0mm |
2.4/2.7mm |
Selvege wire |
3.0/3.4/3.8mm |
3.0/3.4mm |
Lacing wire |
2.2mm |
2.2mm |
Fasteners |
3.0mm |
3.0mm |
Stiffeners( using lacing wire ) |
2.2mm |
2.2mm |
Preformed |
3.8mm |
3.4mm |
PVC coating thickness: Nominal |
N/A |
0.5mm |
Minimum |
N/A |
0.38mm |
Table 2 typical gabions size (m)
Length
M |
Width
M |
Height
M |
No.
Of Cells |
Volume
M3 |
Meter |
Meter |
Meter |
Each |
Cu.meter |
2.0 |
1.0 |
1.0 |
2.0 |
2.0 |
3.0 |
1.0 |
1.0 |
3.0 |
3.0 |
4.0 |
1.0 |
1.0 |
4.0 |
4.0 |
2.0 |
1.0 |
0.5 |
2.0 |
1.0 |
3.0 |
1.0 |
0.5 |
3.0 |
1.5 |
4.0 |
1.0 |
0.5 |
4.0 |
2.0 |
2.0 |
1.0 |
0.3 |
2.0 |
0.6 |
3.0 |
1.0 |
0.3 |
3.0 |
0.9 |
4.0 |
1.0 |
0.3 |
4.0 |
1.2 |
Table 3 typical gabions size (feet)
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Feet |
Feet |
Feet |
Each |
Cu.Yard |
6.0 |
3.0 |
3.0 |
2.0 |
2.0 |
9.0 |
3.0 |
3.0 |
3.0 |
3.0 |
12.0 |
3.0 |
3.0 |
4.0 |
4.0 |
6.0 |
3.0 |
1.5 |
2.0 |
1.0 |
9.0 |
3.0 |
1.5 |
3.0 |
1.5 |
9.0 |
3.0 |
1.5 |
3.0 |
1.5 |
12.0 |
3.0 |
1.3 |
4.0 |
2.0 |
6.0 |
3.0 |
1.0 |
2.0 |
0.67 |
12.0 |
3.0 |
1.0 |
4.0 |
1.33 |
Packing:
For easy handling and shipping, the gabions are supplied folded flat. A color stripe applied on the side of each folded gabion identifies the size.
Loading:
Usually, gabions will be loaded into 40ft containers to save cost.
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