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What Are Gabions

HESLY GABIONS INFORMATION

In simplest terms, gabions are stone filled baskets used to stabilize soil and prevent erosion...

HESLY Gabion Systems offers a range of erosion control products suitable for a myriad of applications.

BESKING gabion wall
Gabions are wire fabric containers, uniformly partitioned, of variable size, interconnected with other similar containers and filled with stone at the site of use, to form flexible, permeable, monolithic structures such as retaining walls, sea walls, channel linings, revetments and weirs for earth retention. 

Soil erosion is an ever present problem and gabions have proved to be a lasting solution around the world. The earliest known use of gabion-type structures was for bank protection along the Nile River during the era of the Pharaoh. In the subsequent 7,000 years since its initial use by the Egyptians, the gabion system has evolved from baskets of woven reeds to engineered containers manufactured from wire mesh. The lasting appeal of gabions lies in their inherent flexibility.

Gabion structures yield to earth movement but maintain full efficiency and remain structurally sound. They are quite unlike rigid or sem-rigid structures which may suffer catastrophic failure when even slight changes occur in their foundations. Highly permeable, the gabion structures act as self draining units which "bleed" off ground waters, relieving hydrostatic heads. Interstitial spaces in the rock fill dissipate the energy of flood currents and wave action.

BESKING gabion mattresses

Efficiency in gabion structures, rather than decreasing with age, actually increases. During early periods of use, silt and vegetation will collect with the rock fill to form a naturally permanent structure and may be used to remove solid pollutants or "floatables" from the water.

 

Gabions and mattresses may be purchased as as assembled baskets, as unassembled panels, or in rollstock form.  Rollstock may utilized to build continuous gabion structures up to 300 feet in length or mattresses up to 150' in length.

WELDED STEEL WIRE MESH GABION

SPECIFICATIONS - GALVANIZED GABIONS

MATERIAL. welded mesh gabions

a. General: Gabions shall be made of pre-galvanized welded steel wire mesh of a nominal size of 3" x 3(7.5 cm x 7.5 cm). b. Dimensions: Gabions shall be supplied in various lengths and heights. Dimensions for heights, lengths, and widths are subject to a tolerance of " 5% of manufacturer's stated sizes.

 

gabions material analyseFABRICATION. Gabions shall be fabricated in such a manner that the base, sides, lids, ends, and diaphragms can be assembled at the construction site into a rectangular unit of the specified size. Where the length of the gabion exceeds its width, the gabion shall be divided by diaphragms into cells of equal length.

 

The wire mesh shall be made of galvanized steel wire having a diameter of 0.120(3.0 mm) or 0.106(2.7 mm). According to ASTM A-974-97, all wire used in the fabrication of the gabion and in the wiring operations shall conform to US federal specifications QQ-W-461H and possess a soft tensile strength with a class 3 finish 5 zinc coating in accordance with ASTM A-641. Preformed steel wire spiral binders with a 3" pitch are used to assemble and interconnect empty gabions and shall meet the same specifications as the wire used in the mesh.

 

After assembly, the individual gabion units are interconnected to each other as per manufacturer's instructions and then filled with clean, hard stone from 4-8' indiameter. The lids are then closed and joined to the top edges of the individual gabions and diaphragms. Ring fasteners and twist-ties may be used in lieu of lacing wire for forming individual baskets and joining empty baskets together. A twist tie shall be provided at intervals of about 6". The connection shall be accomplished by turning the twist tie through 1-1/2 turns. Ring fasteners, twist ties and lacing wire can be used in lieu of spiral binders.

PVC COATED GABIONS

The same specifications for galvanized gabions apply with the additional polyvinyl chloride (PVC) coating which will be fuse bonded onto the welded mesh as follows: hexagonal wire netting

 

Mesh Wire ....................... core only . 0.106" (2.7 mm) 
Spiral Binders .................. core only ... 0.106(2.7 mm) 
Lacing Wire & Twist Ties .... core only ... 0.087(2.2 mm) 
PVC Coating Thickness0.015" (0.4 mm) minimum
 per side 

 

RESISTANCE OF THE COATING. The protective coating must be resistant to the destructive effects of immersion in 
acidic, salt, or polluted water, exposure to ultraviolet light and abrasion and shall retain these characteristics after a period of not less than 3,000 hours under
 tests in accordance with ASTM G-23.

 

SPECIFICATIONS -WELDED STEEL WIRE MESH - GALVANIZED GABION MATTRESS

 

MATERIAL. a. General: Gabion mattresses shall be made of welded steel wire mesh of a nominal size of 1-1/2" x 3(3.8
cm x 7.5 cm). b. Dimensions: Gabion mattress units shall be supplied in various lengths. The thickness shall be 6", 9", 12" or 18". The horizontal width shall be 6'. All dimensions are subject to a tolerance of ?5% of manufacturer's stated sizes.

 

FABRICATION. Gabion mattress units shall be fabricated in such a manner that the base, sides, lids, ends, and 
diaphragms can be assembled at the construction site into a rectangular unit of the specified size. The mattress unit length shall be subdivided into 3' compartments by the insertion of diaphragms made of the same mesh as the rest of the mattress.

 

The wire incorporated in the mesh constituting the body of the mattress shall be made of galvanized steel wire having a 
diameter of 0.087" (2.2 mm). Preformed steel wire spiral binders with a 3" pitch are used to assemble and interconnect
empty gabion mattresses and shall meet the same specifications as the wire used in the mesh. All wire used in the 
fabrication of gabion mattresses and in the wiring operations shall conform to ASTM A-974-97 and US federal specifications QQ-W-461H and possess a soft tensile strength with a class 3 finish 5 zinc coating in accordance with ASTM A-641.

 

After assembly, the individual mattress units are interconnected to each other as per manufacturer's instructions and then filled with clean, hard stone from 3'- 6" in diameter. The lids are then placed and spiraled to the top edges of the individual gabion mattresses and diaphragms. Ring fasteners, twist ties and lacing wire can be used in lieu of spiral binders.

 

PVC COATED GABION MATTRESSES

 

The same specifications as for galvanized gabion mattresses apply with the additional polyvinyl chloride (PVC) coating which will be fuse bonded onto the welded mesh as follows:

 

Mesh Wire .................. core only ...... 0.087" (2.2 mm) 
Spiral Binders ............. core only ......... 0.106(2.7 mm) 
Lacing Wire & Twist Ties....core only ..... 0.087(2.2 mm) 
PVC Coating Thickness0.015" (0.4 mm) minimum per side 
 
RESISTANCE OF THE COATING. The protective coating must be resistant to the destructive effects of immersion in acidic, salt, or polluted water, exposure to ultraviolet light and abrasion and shall retain these characteristics after a period of not less than 3,000 hours under tests in accordance with ASTM G-23.

 

Welded Steel Wire Mesh Gabions & Gabion Mattresses  conforming to ASTM A974-97  US Federal Specification QQ-W-461H Class 3, ASTM A-641, ASTM A-90, ASTM A-185

 

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