An earth retaining wall holds back the ground where the land will not hold itself — preventing soil erosion, retaining the soil beside culverts, underpasses and bridges, and stabilising sloped ground. Our modular L-type units are cast in the yard and stacked on site into a wall that carries load from the day it goes up.
Each unit interlocks with the next, so a wall rises quickly and to a clean, fair-face finish that needs no rendering or cladding. The same M50–M75 standard that goes into our drains goes into the wall that keeps them in place.
A cast-in-place retaining wall ties up formwork and curing time on ground that is often already moving. Precast units arrive finished and stack into a wall that takes load immediately — stabilising the slope far sooner.
It prevents soil erosion, retains the soil near culverts, underpasses and bridges, stabilises sloped ground and shapes landscaping — anywhere a slope has to be held back cleanly and permanently.
A wall that stacks in days and holds the slope from the first unit up.
Keeps embankments and cut faces stable where the ground will not hold itself.
Interlocking units stack quickly and carry load from the first course up.
A clean precast face that needs no rendering or cladding once it is up.
Standard L-type sections for heights of 600–2500 mm — for the prevention of soil erosion, to retain the soil near culverts, underpasses and bridges, to provide stability in sloped soil, and for landscaping. Customized sizes available for mass quantity.
| Height (mm) | B | t1 | t2 | t3 | t4 | g | h | L |
|---|---|---|---|---|---|---|---|---|
| 600 | 680 | 70 | 70 | 70 | 70 | 100 | 300 | 2000 |
| 800 | 760 | 80 | 80 | 80 | 80 | 100 | 400 | 2000 |
| 1000 | 850 | 90 | 90 | 90 | 90 | 100 | 500 | 2000 |
| 1200 | 970 | 100 | 100 | 100 | 100 | 120 | 600 | 2000 |
| 1800 | 1330 | 100 | 140 | 100 | 140 | 150 | 800 | 2000 |
| 2000 | 1450 | 100 | 140 | 100 | 140 | 150 | 800 | 2000 |
| 2250 | 1600 | 100 | 170 | 100 | 170 | 180 | 900 | 2000 |
| 2500 | 1750 | 100 | 170 | 100 | 170 | 180 | 900 | 2000 |
Units sit on bedding mortar over foundation concrete and a crushed stone foundation; water relieves through draining holes in the stem.
Customized sizes available for mass quantity. Send us a drawing and we'll cast to your exact height, load and base.
Drag to rotate the Earth Retaining Wall and zoom in to see the section, joints and lifting points.
Common questions on height, design and foundation. For anything project-specific, send us your drawing.
Standard L-type units cover retained heights from 600 mm to 2500 mm. Beyond that we cast to a project-specific design — send us the height and ground conditions and we'll size the section.
The standard range assumes reinforced concrete at γc = 24.5 kN/m³, soil at γs = 19 kN/m³, an angle of internal friction of 30° and a 10 kN/m² overburden load, with a sliding safety factor of at least 1.5 and eccentricity within B/6. If your site differs, we re-check the design.
High-performance concrete from M50 to M75, RCC reinforced, with a fair-face finish that needs no rendering or cladding once it's up — the same standard that goes into our drains.
Units arrive cured and finished, so they carry load from the first course up. A wall stacks in days and stabilises the slope far sooner than a cast-in-place wall waiting on formwork and curing.
Units include ø 70/75 mm draining holes, and the detail behind the wall uses a soil-particle stop filter and draft-prevention material at the joints, so water relieves through the wall instead of building pressure behind it.
Yes — customized sizes are available for mass quantity. Send a drawing with the height, load and base and we'll cast to your exact spec.
Heavy-duty precast U-drain with a load carrying capacity of 5 T wheel load — for storm water drains and power and telecommunication cable ducts where traffic runs over the channel.
Light precast U-drain (T6) for storm water drains and power and telecommunication cable ducts on footpaths, plazas and low-traffic streets — the same sealed, smooth bore in a leaner section.
Precast FT-Flume for storm water drains, power ducts and road crossings — a replacement of pipe culverts, cast in 2 m lengths across a wide range of heights and widths.
RCC box culverts for storm water drains, power ducts and road crossings, as a replacement of pipe culverts. Single or twin cell, sized to the load and dropped straight into the trench.
Send us your specifications and quantities. We'll come back with grades, lead times and a quote — usually within two working days.