Wrong work is cheapest to fix before it is covered: rebar is checked before the pour, pipes are tested before the wall is plastered. Simple quality control means every important item has a check point, the result is recorded, and anything non-compliant is logged as an NCR until it is fixed.
Checklist before a column pour
| Check | Requirement | Result C5-07 |
|---|---|---|
| Bar size and number | As drawn: 4 D13 | OK |
| Stirrup spacing | D8-150, 100 near the ends | OK |
| Concrete cover | 25 mm spacers fitted | Short on 2 sides, fixed |
| Formwork | Plumb, strong, tight, clean | OK |
| Approval | Supervisor initials before the pour | Initialled 23/06 |
Concrete tests
- A slump test on every truck or batch, recorded with the delivery note number. The slump follows the project specification.
- Cylinder or cube samples taken as the specification says, labelled with the pour date and location.
- Strength is judged at 28 days unless the specification says otherwise. A 7-day test is an early warning; it is usually well below the 28-day value, so compare it with the supplier’s expected figure.
- Keep laboratory results per pour location, so a low result points to the part affected.
Non-conformance report (NCR)
| NCR field | Example |
|---|---|
| Number and date | NCR-014, 23/06/2026 |
| Location and work | C5-07, column K1 |
| Non-conformance | Concrete cover under 25 mm on 2 sides |
| Action | Add spacers before the pour |
| Owner and deadline | Rebar foreman, before the pour on 24/06 |
| Closed by | Supervisor, 24/06 after re-inspection |
Common mistakes
- Inspections done after the work is covered.
- Concrete samples without a location label, so a low result cannot be traced.
- NCRs opened but never closed.
- Repair costs not charged to the responsible subcontractor or foreman.
The full guide is in How to create a weekly construction schedule report in Google Sheets. It has a free template (Excel or Google Sheets) and a checker that reads your own workbook.
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When your workbook is complete, apply for a pilot: we help connect your project data to the Finance, Cost and Scheduler agents and review the first reports with you.
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Common questions
What is an NCR?
A non-conformance report: a record of work that does not meet the specification, the repair, who is responsible and when it is closed.
When is concrete strength judged?
At 28 days unless the specification says otherwise. The 7-day test is only an early warning.
What must be checked before moving on?
Rebar and formwork before pouring, pipes and wiring before covering, and waterproofing before backfilling or covering.
References
- ITS journal: concrete strength by age (Indonesian): 7, 14 and 28 day comparison