HGV yard compaction records

Once an HGV yard foundation is covered, its quality becomes difficult and expensive to prove. A delivery ticket shows that material reached the site. A roller photograph shows that plant was present. Neither proves which area was built, at what thickness, under which conditions, or what happened when a result failed.

The useful record follows the layer across the yard. It links the approved formation, delivered material, placement area, compaction method, survey and specified tests to one identifiable section of work before surfacing hides it.

This is not a universal test schedule. The pavement design, ground model and project specification must define the required methods, frequencies and acceptance values. The site record exists to show that those requirements were followed.

Turn the design into inspection points

Start with the documents that control the work: pavement drawings, earthworks and material specifications, geotechnical information, drainage levels, construction sequence and the inspection and test plan.

Break the yard into areas that can be located later. Grid references, chainages, bay numbers or drawing zones all work if they are consistent. Avoid records such as “yard sub-base complete” when the yard contains different formation conditions, pavement zones or dates of construction.

For each layer, the inspection and test plan should identify:

the drawing and specification revision;
the area and layer being accepted;
what must be checked before work starts;
the required material evidence;
the placement and compaction controls;
the test method, location and frequency set by the specification;
the hold point before the next layer;
who can accept, reject or release the work.

The hold point matters because later evidence cannot fully reconstruct a surface that has already been covered.

Record the formation before improving it

Formation approval should describe what was actually exposed. Note the soil or fill condition, weather, water, soft spots, disturbance, proof-rolling observations where specified, survey level and any difference from the ground information.

Photographs are useful when they show location and scale. Pair them with a marked-up plan rather than relying on a folder of similar brown surfaces.

If unsuitable or softened material is removed, record the boundary, depth, replacement material and approval. If stabilisation, geogrid, capping or another treatment is used, link it to the designer’s detail and record the installed extent. A corrected area should not disappear into a general sign-off.

The current BS 5930 ground investigation code provides a framework for ground investigation and reporting. It does not set a private yard’s acceptance criteria, but it reinforces why the ground model, variability and stated assumptions must remain connected to the construction record.

Link material deliveries to the placed area

Material traceability needs more than a stack of tickets. Record the supplier, material designation, source, delivery references, relevant declarations or test certificates, and the area where each batch was used.

Check whether the delivered material matches the project specification before spreading it. Segregation, contamination, excess moisture or a changed source can alter the layer even when the delivery description looks familiar.

Our aggregate tonnage calculator can help estimate early quantities, but volume and tonnage do not demonstrate compliance. The record must connect what arrived to what was specified and where it was incorporated.

Capture lift thickness and compaction method

The record should identify the loose or compacted lift thickness required by the specification, the plant used, relevant roller settings, the number and pattern of passes where method compaction applies, and the conditions during the work.

Do not copy a pass count from another scheme. A compaction method depends on material, layer thickness, plant and the governing specification. Where the project uses an end-product requirement, the test result and acceptance process control the decision instead.

The current Manual of Contract Documents for Highway Works hub explains that the manual was restructured in September 2025 and instructs users to select the correct version specified by their contract. If a project adopts one of those documents, the record should cite the exact document, version and works-specific requirements. Those requirements do not apply automatically to a private HGV yard.

Record conditions that affect the result. Heavy rain, standing water, frozen material, drying, reworking and uncontrolled construction traffic can all make a nominal layer different from the accepted one.

Put every test on a plan

A passing result without a location cannot demonstrate the area it represents. Give each test a unique reference and plot it against the same grid, chainage or bay system used for the work record.

Depending on the specification, records may include moisture, density, stiffness, plate loading, grading, layer thickness, level or other tests. Do not mix methods or units. State the method, equipment, calibration reference where required, test depth or layer, result, acceptance value and decision.

Where the project schedules test methods and frequencies against specification clauses, copy those exact references into the inspection record. A private-yard project must set its own contractual requirements rather than borrowing frequencies from another scheme without design justification.

Use the location plan to look for gaps. A dozen passing results clustered beside the access gate do not evidence a remote turning head, dock approach or backfilled service crossing.

Record failures and the accepted disposition

A failed result is not closed by repeating a test somewhere nearby. Record the affected area, immediate action, investigation, corrective work, retest and the person who accepted the disposition.

Corrective work may involve further passes, moisture conditioning, removal and replacement, local treatment or engineering review. The appropriate response depends on the material and design. The record should not imply that one response suits every failure.

Where the designer accepts a result or condition through review, keep that decision with the test and drawing location. An email separated from the quality file is easy to lose and difficult to interpret at handover.

Check level, falls and interfaces before surfacing

Compaction is only part of layer acceptance. Survey the surface against the designed levels and falls. Check the tie to channels, gullies, kerbs, dock aprons, thresholds, chambers and adjacent pavement zones.

A strong foundation built at the wrong level can leave too little room for surfacing or create a drainage low point. The correction becomes more disruptive after kerbs, channels or asphalt have fixed the surrounding geometry.

Inspect service trenches and local excavations separately. These narrow areas often use different compaction plant and can settle as a strip through otherwise sound work. Record duct and chamber positions before they disappear beneath the pavement.

Protect accepted work until it is covered

Release at a hold point is not permission to damage the layer. Define how accepted areas will be kept free of standing water, contamination, rutting and uncontrolled trafficking before the next course is placed.

If construction vehicles must use the permanent pavement foundation, the designer should confirm that the temporary loading and weather condition are compatible with the design. Inspect again before covering if the layer has been trafficked or exposed.

Hand over one connected record

A practical HGV yard foundation record should contain:

the approved drawing and specification references;
a location plan divided into traceable work areas;
formation approvals and records of local treatment;
material source and delivery traceability;
placement dates, lift information and compaction plant;
test schedules, results and plotted locations;
survey levels and interface checks;
non-conformances, corrective work and acceptance;
photographs tied to areas and dates;
final release before surfacing.

This gives the client and pavement designer evidence they can use if a local defect appears later. More importantly, it lets the site team identify missing evidence while the layer is still visible and correctable.

Rospower Projects delivers warehouse and industrial groundworks from earthworks and drainage through pavement foundations and final hardstanding. If an HGV yard specification is complete but the inspection record is not yet practical for site use, send it through work with us or request a proposal. We can help turn the requirements into buildable hold points and traceable records.

Eddie Lyons is the construction director at Rospower Projects. Read more about the team on our about page or contact Rospower Projects to discuss warehouse and service-yard groundworks.