Precast Concrete Box Culvert Quantity Calculator
Precast concrete box culvert run to BS EN 14844, with granular Class 6N surround and integral headwalls at each end. Computes precast units (Nr), concrete blinding, geotextile separator, foundation excavation, disposal, and scour protection per HD 78/16.
Slug · box_culvert · v1.0
Paid tier
Subscribe or buy a pass to compute this assembly
Paid assemblies surface their parameter forms, BoQ output, project save/reload, and full per-standard Excel + DXF + PDF deliverables once a CivilQuants subscription or 7-day pass is active. Per-standard bills across CESMM4, NRM2, SMM7, and MMHW; project-level recompute; watermark-free outputs.
Precast Concrete Box Culvert — 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 · 10 items · units m³, nr, m²
| Code | Description | Unit | Quantity |
|---|---|---|---|
| E.4.3.5 | Excavation for foundations, maximum depth 2-5m | m³ | 272.21 |
| E.5.3 | Disposal of excavated material off-site | m³ | 140.86 |
| E.6.3.2 | Filling, imported selected material, Class 6N (selected granular) per 503/612 | m³ | 29.52 |
| E.6.2.1 | Filling, excavated material | m³ | 131.35 |
| F.1.1.4 | In-situ concrete blinding, C20/25, thickness 150mm | m³ | 4.06 |
| F.1.1.1 | In-situ concrete blinding, C8/10, thickness 150mm | m³ | 0.66 |
| H.7.1.3 | Precast concrete headwall to 900mm diameter outfall pipe, approximately 4.8t, set on bedding (catalogue size PHW_900) | nr | 2 |
| E.4.1 | Scour protection apron to precast outfall headwall, rock armour, nominal 200mm graded stone | m³ | 3.91 |
| H.7.4.3 | Precast concrete box culvert unit, medium, 1500mm clear span × 1200mm clear height (clear opening 1.80m²), approximately 4.8t per unit, 1.000m unit length (catalogue size BC_1500x1200) | nr | 12 |
| E.7.2 | Geotextile separator, 200 g/m², including laps | m² | 27.06 |
Procurement take-off: the total quantity to order of each material, from the same compute. Supplier-neutral, so you buy anywhere.
- Box Culvert Unit12 nr
- Concrete Blinding4.72 m³
- Disposal140.86 m³
- Excavation Foundation272.21 m³
- Fill General131.35 m³
- Fill Selected29.52 m³
- Geotextile Separator27.06 m²
- Headwall3.91 m³
- Headwall2 nr
Illustrative example at default dimensions · engine ref 904b55 · not a tendered quantity