ASTM A 975 standard heavily galvanized gabion baskets for hydraulic engineering

Gabion basket is 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.

Revet mattress, also called reno mattress, is also a double-twisted wire mesh container with the same weaving method as gabion baskets, only having relatively smaller height and smaller mesh openings than the mesh used for gabions. Revet mattress are generally used for riverbank protection and channel linings.

We can produce the gabion baskets and revet mattress on a basis of various materials as follows.

Heavily zinc-coated steel wire conforming to ASTM A 641, Class 3 coating, soft temper;

Zn-5Al-MM-Coated steel wire conforming to ASTM A 856/856M, Class 3, soft temper;

The same type of metallic-coated steel wire as above, but with an additional PVC coating extruded onto the metallic-coated steel wire;

l  Aluminum-coated steel wire conforming to ASTM A 809, soft temper;

The most popular wire diameter for gabion baskets is 2.7mm, 2.2mm for revet mattress.

Weaving: a nonraveling mesh made by twisting continuous pairs of wires through three one-half turns(commonly called double-twisted) to form hexagonal-shaped openings which are then interconnected to adjacent wires to for hexagonal openings. The most popular mesh opening for gabion baskets is 80x100mm size, 60x80mm for revet mattress. During the process, a terminal wire will be used to edge the wire mesh perpendicular to the double twist by mechanically wrapping the mesh wires around it at least 2.5 times or by inserting it throughout the twists and folding one mesh length. We always use 3.4mm wire for gabion baskets, 2.7mm wire revet mattress.