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GABIONS 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 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.
INTERNATION 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 420N/mm2 and 500N/mm2 according to EN 10218-2
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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