Pipe Bedding 4/20 mm delivered in Cambridge
4/20 mm graded bedding is the workhorse size for larger-diameter and deeper drainage. The wider grading gives strong interlock and good haunch support under 225 mm and above, and it places quickly in volume — which matters when a trench run is measured in hundreds of metres rather than tens.
Into Cambridge and across East of England we supply it loose by tipper, by grab lorry where a stockpile has to be loaded or reached over a boundary, or in bulk bags for plots a lorry can't discharge into. Grab, tipper and HIAB loads across Cambridge, Ely, Huntingdon and Newmarket. Timed and out-of-hours windows for city-centre and campus sites.
Specification
- Nominal size
- 4/20 mm graded
- Typical use class
- Bedding, haunch and surround
- Material
- Primary crushed rock or gravel
- Compaction
- Strong interlock, good haunch support
- Supply formats
- Loose tipper, grab lorry, artic, bulk bag
- Typical load
- 16–20 t tipper, 28–29 t artic
Lead time
Stocked line — most postcodes in England and Wales are dispatched within 24–72 hours of order confirmation. Scotland and Highland deliveries are typically 3–5 working days. Programmed civils schedules are booked in advance and delivered to your call-off dates.
Typical uses on Cambridge sites
- Bedding and surround to 225 mm and larger drainage
- Deep trench work where haunch support is critical
- High-volume adopted sewer and highway drainage runs
- Attenuation and soakaway fill where void ratio matters
Conservation-area access and college estates mean timed, low-disruption drops; the science-park and biomedical campus pipeline runs on bulk sub-base and drainage bedding.
What shapes Pipe Bedding 4/20 mm supply in Cambridge
Drainage packages on science-park, biomedical campus and college estate works around Cambridge take Pipe Bedding 4/20 mm in daily call-offs rather than one bulk drop, so bedding lands as each run is dug rather than sitting in the way. Conservation-area and college-estate drops needing timed, low-disruption windows decide whether it arrives by tipper, grab or bulk bag. Where the same site is also producing arisings off tightly controlled campus and college sites, we plan the removal and the delivery together so the lorry is not running one leg empty. The same routes serve Ely, Huntingdon and St Neots.
Questions we get asked
Is 4/20 mm suitable for adopted sewers?
It is widely used for adopted drainage bedding and surround, but the size and class must match the adopting authority's detail and your engineer's specification. We can supply grading and test data to support submission.
Can you deliver 4/20 mm in artic loads?
Yes — for bulk civils programmes we deliver 28–29 tonne artic loads direct to site on a booked call-off schedule, which is the lowest cost per tonne where access allows.
Can you deliver into conservation-area streets?
Yes — HIAB, bulk bags and manual offload cover sites where a tipper cannot discharge, with timed windows to limit disruption.
Material out as well as in, around Cambridge
Most deliveries into Cambridge pair with a removal: the lorry takes your arisings to a licensed facility and comes back loaded, so you pay for one movement rather than two.
Need pipe bedding 4/20 mm in Cambridge?
Send us the tonnage, postcode and access — quote back within one working day.