Counterfort Retaining Wall Quantity Calculator
In-situ reinforced concrete counterfort retaining wall with thin curtain wall spanning horizontally between discrete RC counterforts. Computes excavation, blinding, reinforced concrete body, counterforts, base, formwork, reinforcement to BS 8666:2020, backfill, and drainage.
Slug · counterfort_wall · v1.0
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Counterfort Retaining Wall — a worked example, measured four ways
The same assembly at default dimensions, rendered as a Bill of Quantities under each measurement standard. Switch the standard to see how the bill changes. Change the inputs in the calculator to compute your own.
CESMM4 · 16 items · units m³, t, m², m
| Code | Description | Unit | Quantity |
|---|---|---|---|
| E.4.2.6 | General excavation, maximum depth 5-10m, commencing from existing ground level | m³ | 1444.25 |
| E.5.3 | Disposal of excavated material off-site | m³ | 470.31 |
| E.6.3.2 | Filling, imported selected granular material, Class 6N to SHW | m³ | 328.55 |
| E.6.2.1 | Filling, excavated material | m³ | 973.94 |
| F.1.1.1 | In-situ concrete blinding, C8/10, thickness 150mm | m³ | 14.81 |
| F.6.3 | In-situ reinforced concrete C32/40, counterfort retaining wall (base, curtain wall, counterforts), stem height 5.00m, retained height 4.70m, counterforts at 4.00m centres, thickness exceeding 500mm | m³ | 122.95 |
| G.5.1.3 | Reinforcement, high-yield steel bars to BS 4449 grade B500B, 10mm diameter, straight bars (BS 8666 shape 00; bar marks 02) — preliminary schedule, confirm with detailed design | t | 1.43 |
| G.5.2.3 | Reinforcement, high-yield steel bars to BS 4449 grade B500B, 10mm diameter, bent bars (BS 8666 shape 41; bar marks 04) — preliminary schedule, confirm with detailed design | t | 0.29 |
| G.5.1.4 | Reinforcement, high-yield steel bars to BS 4449 grade B500B, 12mm diameter, straight bars (BS 8666 shape 00; bar marks 01) — preliminary schedule, confirm with detailed design | t | 3.35 |
| G.5.1.5 | Reinforcement, high-yield steel bars to BS 4449 grade B500B, 16mm diameter, straight bars (BS 8666 shape 00; bar marks 07, 08) — preliminary schedule, confirm with detailed design | t | 3.63 |
| G.5.1.6 | Reinforcement, high-yield steel bars to BS 4449 grade B500B, 20mm diameter, straight bars (BS 8666 shape 00; bar marks 05, 06) — preliminary schedule, confirm with detailed design | t | 7.58 |
| G.5.2.7 | Reinforcement, high-yield steel bars to BS 4449 grade B500B, 25mm diameter, bent bars (BS 8666 shape 11; bar marks 03) — preliminary schedule, confirm with detailed design | t | 1.55 |
| G.1.4 | Formwork to vertical and battered faces | m² | 381.87 |
| I.4.4.2 | Perforated land drain, HDPE, nominal bore 150mm | m | 25 |
| L.5.2 | Granular surround to pipe, 20mm single-size aggregate | m³ | 4 |
| E.7.2 | Geotextile separator, 200 g/m², including laps | m² | 22 |
Procurement take-off: the total quantity to order of each material, from the same compute. Supplier-neutral, so you buy anywhere.
- Concrete Blinding14.81 m³
- Concrete Reinforced122.95 m³
- Disposal470.31 m³
- Excavation General1444.25 m³
- Fill General973.94 m³
- Fill Selected328.55 m³
- Formwork381.87 m²
- Geotextile Separator22 m²
- Pipe Land Drain25 m
- Pipe Surround4 m³
- Reinforcement17.83 t
Illustrative example at default dimensions · engine ref 4cea33 · not a tendered quantity