Box gabions and mattress gabions shall be of the hexagonal wire mesh type with double twist non ravelling joints (one and a half turns of wire).
When used to form gabions and reinforcement, the mesh will have larger diameter wire used to form the edges parallel and normal to the twist joints, termed edge and selvedge wires respectively. Mesh openings shall be hexagonal in shape, nominally 80 x 100mm with minimum dimension not exceeding 83mm.
Gabion boxes shall be formed from mesh as described above, divided by internal partition panels (diaphragms) at no more than 1m centres, and with horizontal bracing wires at mid height of 500mm deep boxes, and one and two thirds height for 1m deep boxes.
Mattress gabions shall be formed from mesh as described above, except that the wire shall have a minimum core diameter of 2.0mm, divided by internal partition panels (diaphragms) at no more than 1.0m centres.
Double Twisted Wire Mesh Gabions Boxes
Mattress Gabions with Twist Joints