BUILDING & PLANNING · FIELD TOOL
A 200 m site road 4 m wide with 300 mm of compacted stone, a passing bay and a 100 m² turning head covers 930 m². It needs 279 m³ compacted (349 m³ loose), about 586 t of stone at 2,100 kg/m³ or 30 loads of 20 t, and about 1,240 m² of geotextile.
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| Compacted volume | 279 m³ |
| Loose volume to deliver | 349 m³ |
| Geotextile | 1,243 m² |
| Road area incl. bays and turning | 930 m² |
| Passing bays | 1 |
| Tipper loads | 30 |
Thickness depends on ground strength (CBR) and traffic: check with the temporary works designer, and plan drainage ditches alongside.
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Area = length × width + passing bays + turning area
Stone = area × compacted thickness (× loose factor to order by volume)
Tonnes = compacted volume × density
Geotextile = length × (width + 2 × edge extra) + bays + turning, + laps200 m × 4 m, 300 mm, 1 passing bay of 30 m² (one every 100 m), 100 m² turning head:
It depends on the ground strength and the vehicles, often 250–450 mm of crushed stone on geotextile for soft ground and loaded trucks. A temporary works designer should confirm it.
About 3.5–4 m for one lane with passing bays, or 6–7 m for two-way traffic, plus space for pedestrians separated by barriers.
It keeps the stone separate from soft soil, so the stone does not sink and the road lasts longer with less material.