9ga or 5ga or 4ga checklist

9ga = 1/8th" | 5ga = 3/16th" | 4ga = 44% stronger than 5ga

9ga5ga4ga
will be walked or sat on
suitable for round river rocks
straight architectural look required
building tall, thin structural gabions
finished wall OK with minor bulges
lowest cost
erosion control with high flood velocities
tall columns or pillars
furniture seat supports
requires careful stacking of angular rocks
for use in public parks

Angular rock is the best gabion fill as it provides a good interlock and therefore less deformation of the face occurs

1/8th or 3/16th diameter Galfan coated wire deflection video

Deflection Testing

Electronically welded wire mesh 3in x 3in grid

Deflection Testing

Gives a good indication of the likelihood of the gabion sides bulging, The size, shape, placement of rock, use of form-work during installation and the number of bracwwires, are other factors that can effect the final shape of the gabion.

Deflection Testing

Gives a good indication of the likelihood of the gabion lid bending out of shape, when walked on.

Deflection Testing Results

Mesh diameterMeasured deflection
4 gauge0.7"
5 gauge = 3/16th"1.0"
6 gauge1.9"
9 gauge = 1/8th">4"
gabion grid size
3/16th dia wire is 125% stronger than 1/8th dia wire
In locations where high flood water velocities are expected, carrying woody debris and gravels in suspension, the stronger 3/16th (5ga) or 4ga welded gabions are the preferred choice, to resist damage to the gabion structures during floods.