Structural concrete pouring carries significant quality, safety, cost, and programme risk. The procedure must confirm that formwork, reinforcement, embedded items, access, personnel, equipment, concrete supply, testing, and curing are ready before pour approval.
Purpose and scope
This procedure applies to foundations, columns, beams, walls, and slabs. Its purpose is to ensure concrete is placed in accordance with approved drawings, specifications, method statements, and the inspection and test plan.
Roles and responsibilities
The site manager controls resources and coordination; the site engineer controls method and sequence; QC manages hold points and testing; HSE controls safe access; the surveyor verifies levels; supervisors direct crews; and the supplier maintains quality and continuity.
Pre-pour inspection
Confirm approved drawings, stable and clean formwork, correct dimensions and levels, compliant reinforcement, cover blocks, complete joints and embedded items, prepared construction joints, and no standing water. Do not proceed until critical findings are closed.
Equipment and logistics
Prepare the pump or bucket, primary and standby vibrators, finishing tools, lighting, communication, mixer access, washout area, curing materials, rain protection, and safe power. Coordinate deliveries to prevent cold joints or truck congestion.
Concrete acceptance and testing
Verify delivery records, concrete class, batching time, quantity, admixture, and placement location. Perform slump and specimen testing under the ITP. Quarantine nonconforming concrete; never add water without authorised technical control.
Placement and compaction
Place concrete close to its final location, control free-fall height, and pour continuously in layers. Vibrate at suitable spacing and duration without displacing reinforcement. Prevent over-vibration, segregation, and local overloading.
Finishing, curing, and protection
Control level and flatness, finish at the correct time, and start curing as soon as conditions permit. Protect concrete from moisture loss, rain, vibration, early loading, and premature formwork removal.
Acceptance and records
Record volume, location, start-finish times, mixer numbers, slump, specimens, weather, disruptions, and corrective actions. Acceptance covers geometry, level, surface condition, strength results, and approved defect repair.
Pre-start readiness checklist
- Approved pre-pour permit and checklist
- Accepted formwork, reinforcement, embeds, levels, and cleanliness
- Concrete supply, pump, standby vibrator, access, lighting, and curing ready
Inspection and Test Plan (ITP)
| Stage | Main inspection | Control point |
|---|---|---|
| Pre-pour | Dimensions, level, cover, joints, cleanliness | Hold point before pour |
| Receipt | Delivery record, slump, temperature if required | Each truck or ITP frequency |
| Placement | Layers, compaction, level, continuity | Continuous surveillance |
| Post-pour | Finish, curing, specimens, protection | Release against acceptance |
Only authorised personnel may release a hold point under the Project Quality Plan. Every checklist should identify location, date, drawing revision, result, inspector, findings, and closure evidence.
Execution risks and controls
- Formwork movement: verify design, supports, and monitor during pouring.
- Cold joints: control supply capacity, sequence, and communication.
- Segregation or honeycomb: control free fall, layer depth, and vibration.
- Early loading: restrict access and follow stripping criteria.
Nonconformance and handover records
Identify nonconforming work, prevent concealment, and record it through an NCR or defect list. Define cause, disposition, repair method, reinspection, and approving authority. Minimum records include material approvals, checklists, test results, calibration certificates, photographs, as-built drawings, closed NCRs, and acceptance records.
Supporting products
Use the Structural Concrete Pouring SOP and the Concrete Curing SOP as practical references.
Conclusion
Reliable concrete results come from pre-pour readiness, continuous supply, correct placement and compaction, disciplined curing, and complete quality records.
Professional implementation framework
Structural concreting must be managed as one controlled process from area release, formwork and reinforcement readiness, concrete acceptance, placement, compaction, finishing, curing, and review of test results. Late coordination can lead to cold joints, honeycombing, level deviations, or untraceable quality evidence.
Roles and accountability
The site engineer coordinates drawings and method; the supervisor manages sequence, labour, equipment, access, and supplier communication; QA/QC controls hold points and testing; the surveyor verifies levels; safety personnel control access, pumping, lighting, and night work; the supplier maintains the approved supply arrangement.
Mandatory inputs and hold points
Current drawings and shop drawings, bar bending schedules, material approvals, mix design, concrete method, pour card, ITP, joint plan, weather data, equipment capacity, truck route, laboratory readiness, and contingency arrangements must be available before the pre-pour meeting.
Every hold point must be recorded in the Inspection and Test Plan. Work must not proceed on verbal approval alone when the next activity will conceal or remove inspection evidence.
Control sequence
- Inspect formwork, supports, reinforcement, cover, embedded items, cleanliness, access, and levels; close findings before releasing the pour card.
- Confirm volume, truck sequence, delivery interval, sampling point, pump communication, standby labour, vibrators, lighting, curing materials, and weather protection.
- Review delivery documentation and concrete condition on arrival; sample and test to the ITP without uncontrolled addition of water.
- Place concrete in a sequence that prevents segregation and cold joints; control drop height, layer depth, compaction, and interaction with embedded items.
- Finish levels and surfaces to the element function, begin curing at the correct time, protect against early loading, and record events throughout the pour.
Acceptance criteria
Formwork is stable and clean, reinforcement and cover match the drawings, embedded items are secured, concrete test results meet project requirements, unacceptable segregation or voids are absent, dimensions and levels are within tolerance, curing is complete, and post-stripping inspection is accepted.
Convert each criterion into a checklist item supported by a measurement, compliant/noncompliant status, location, date, document revision, inspector, and photograph. Terms such as good or adequate are not acceptable without a defined measure or reference.
Quality records and handover
Retain the pour card, pre-pour checklist, delivery tickets, slump or relevant test results, sample identification, truck timing log, pour locations, photographs, weather notes, curing log, strength results, post-stripping inspection, and closed NCRs.
Index records by area and date so they remain traceable during changes, claims, defects, and owner reviews. Incomplete documents become outstanding items with an owner and target closure date.
Risk and nonconformance
Principal risks include interrupted supply, pump failure, rain, unavailable vibrators, formwork movement, displaced reinforcement, segregation, loss of level, and delayed curing. Assign prevention, ownership, standby resources, and clear decision limits for delaying or stopping the pour.
Do not conceal a finding with subsequent work. Identify the area, review the cause, approve corrective action, and reinspect. A repair is closed only when objective evidence confirms that the required function and quality have been restored.
Work close-out
Close the activity only when visual inspection, dimensions, levels, curing, and test evidence are available. Prepare a defect map for areas requiring assessment. Loading, support removal, and follow-on work proceed only under the approved method and technical authorization.
