Sack gabions are cylindrical baskets made of 8x10 double twisted steel woven wire mesh, as per EN 10223-3 (Figs. 1, 2). Sack gabions are filled with stones at the project site to form flexible and? permeable structures used in river trainings and various emergency works. Sack gabions are supplied with steel reinforcing wires inserted during the manufacturing proc-ess to facilitate closing during installation. The steel wire used in the manufacture of the? sack? gabion is heavily galvanized soft temper steel. The standard specifications of mesh-wire are shown in Table 2. In order to reinforce the structure, all mesh panel edges are selvedged with a wire having a greater diameter (Tables 3, 4). Dimensions and sizes of galvanized sack gabions are shown in
Table 1.
Wire All tests on wire must be performed prior to manufacturing the mesh.
1.? Tensile strength: the wire used for the manufacture of gabions shall have a tensile strength between 350-500 N/mm2? according to? EN 10223-3. Wire tolerances (Table? 4) are in accordance with EN 10218 (Class T1).
2.? Elongation: Elongation shall not be less than 10%, inaccordance with? EN 10223-3. Test must be carried out on a sample at least 25 cm long.
3.? Zinc coating: minimum quantities of zinc shown at Table 4 meet the requirements of EN 10244-2 (Table 1 and Class A).
4.? Adhesion of zinc: the adhesion of the zinc coating? to the wire shall be such that, when the wire is wrapped six turns around a mandrel having four times the diameter of the wire, it does not flake or crack when rubbing it with the bare fingers.