A Gabion 250 mm refers to a gabion basket or mattress with a thickness (depth) of 250 mm (0.25 metres). Gabions are wire mesh cages filled with rock, commonly used in civil engineering, landscaping, erosion control, and retaining structures.
A gabion consists of:
Galvanized or PVC-coated steel wire mesh
Filled with durable rock or stone
Connected to adjacent baskets to form a stable structure
The 250 mm measurement refers to the depth of the gabion.
Typical dimensions might include:
2.0 m × 1.0 m × 0.25 m
1.0 m × 1.0 m × 0.25 m
3.0 m × 2.0 m × 0.25 m
The length and width vary depending on the application, but the depth remains 250 mm.
A 250 mm gabion is generally used for:
Riverbank and canal erosion protection
Slope stabilization
Drainage channels
Scour protection around bridge piers
Coastal protection
Landscaping features
Gabion mattresses beneath retaining walls
Because it is relatively thin, a 250 mm gabion is usually called a gabion mattress rather than a standard gabion basket.
Excellent drainage (water passes through freely)
Flexible and adapts to ground movement
Long service life
Environmentally friendly
Reduces erosion
Low maintenance
Can become vegetated over time
Typical rock size:
100–150 mm
Hard, durable quarry stone
Larger than the mesh opening to prevent stones from falling through
A gabion mattress measuring 2.0 m × 1.0 m × 0.25 m has a volume of:
2.0 × 1.0 × 0.25 = 0.50 m³
If rock has a bulk density of approximately 1.7–1.9 tonnes/m³, it will require about:
0.85–0.95 tonnes of rock
| Type | Typical Depth | Common Use |
|---|---|---|
| Gabion Mattress | 150 mm | Light erosion protection |
| Gabion Mattress | 250 mm | Riverbanks, channels, slopes |
| Gabion Basket | 500 mm | Retaining walls |
| Gabion Basket | 1000 mm | Heavy retaining walls and embankments |
In summary, a Gabion 250 mm is a 250 mm-deep wire mesh stone-filled unit, most commonly used as a gabion mattress for erosion control, slope protection, and hydraulic engineering applications rather than as a high retaining wall.