Pour Permit (Concrete)

The Pour Permit (also called Concrete Pour Authorisation or Permit to Pour) is the final hold-point control before any concrete pour. It ensures that every prerequisite for a successful concrete placement is verified + signed-off before the first RMC truck is allowed to discharge.

Concrete pours fail for predictable reasons: - Reinforcement not per drawing — wrong diameter / spacing / cover - Formwork not braced — pour pressure causes blowouts - Embedded items missed — conduits / sleeves not placed; concrete drilling later - No cube moulds ready — strength acceptance impossible - No vibrator backup — poor compaction; honeycomb - No curing material on site — concrete dry-cures; surface cracks - Construction joint not prepared — cold joint without proper roughening

Every one of these failures is structural defect grade, often requiring demolition or expensive remediation. The Pour Permit prevents them by enforcing a systematic pre-pour checklist with triple sign-off (QC + Site Engineer + Consultant / PMC).

Without permit discipline: - Pours start with unverified prerequisites; failures cascade - Concrete that doesn't meet strength rejected; demolition needed - Embedded items missed; later chiselling damages structure - Cube samples not taken; QA impossible; can't bill the pour - Disputes between contractor + consultant on responsibility

Governed by IS 456:2000 (Plain + Reinforced Concrete Code) + IS 1199 (Sampling Methods) + IS 516 (Strength Testing) + CPWD Specifications + project-specific Quality Plan.

Standard pre-pour workflow (typically 24-48 hours before pour):

Stage 1 — Reinforcement inspection (Hold Point #1): - Bar diameter verified vs BBS - Spacing verified (mason's tape measurement) - Cover blocks placed (75 mm bottom for footings, 25-40 mm for slabs / beams) - Lap lengths per IS 456 Cl. 26 - Stirrup tying complete + tight - Cover from formwork verified - 90° hooks at ends of bars present where required - Splice locations + lengths verified - Dowel projection from previous pour verified - Photographs taken with reinforcement visible - Signed by QC + Consultant

Stage 2 — Formwork inspection (Hold Point #2): - Formwork plumb, level, aligned per drawing - Joints tight (no concrete leakage potential) - Form ties / bracing adequate - Internal surface cleaned + oiled - Top of pour line marked (avoid over-pour) - Walkway / safety provisions for workers on top - Embedded items installed: - Conduit / sleeves for electrical / plumbing - Anchor bolts for steel columns - Water-stops at construction joints (water-retaining structures) - Plate connections for steel-RCC composite - Pre-pour photographs - Signed by Site Engineer + Consultant

Stage 3 — Construction joint preparation (if applicable): - Previous pour surface roughened (chipping / brushing) - Loose particles removed - Surface dampened (saturated surface dry condition) - Bonding agent applied (if specified) - Signed by QC

Stage 4 — Resources verification: - Concrete supply: RMC trucks dispatched / scheduled; backup option - Vibrators: minimum 2 working units; standby on site - Power source: stable supply; DG backup ready - Sampling equipment: 6 cube moulds + slump cone + thermometer + sampling tray + cleaning materials - Curing materials: hessian cloth / curing compound / water hose; pre-staged at pour location - Worker availability: pour gang + finishers; standby personnel - Lighting (for evening / night pours) - Weather check: not pouring in heavy rain; no rain expected within 4 hours - Ambient temperature: > 5°C and < 40°C ideal; outside this range = hot/cold weather concreting precautions per IS 7861

Stage 5 — Pour permit issuance: - Project Engineer reviews all sign-offs - Triple sign-off: QC + Site Engineer + Consultant / PMC - Permit number assigned (sequential) - Validity: specific pour only (single-use) - Pour start time + expected end time - Pour record register entry initiated

Stage 6 — During pour: - Slump test at first truck (and every 10th) - Cube samples taken (1 set per 50 m³, minimum 1 set per pour) - Concrete temperature logged at start, mid, end - Continuous vibration during placement - Cold joints avoided (don't stop > 30 min) - Top surface levelled + finished per spec - Pour completion logged - Curing started within 1 hour of finish

Stage 7 — Permit closure: - Pour completed report - Volume actually placed vs scheduled - Slump + cube records appended - Issues during pour (if any) - Curing schedule activated - Permit closed + filed

1. Pour permit not insisted — RMC truck arrives, gang ready, engineer says "start"; permit signed retrospectively; defeat of purpose.

2. Reinforcement deviation accepted on site — "we'll add couple more bars"; not formally re-approved by designer; structural impact.

3. Cover blocks moved during pour — pre-pour OK; during pour, vibrator displaces cover blocks; reinforcement closer to surface than design.

4. Embedded items missed despite checklist — pre-pour says OK but one MEP engineer absent; later jackhammering damages.

5. No vibrator backup — primary vibrator fails mid-pour; pour continues without compaction; honeycomb.

6. No cube samples taken — pour gang doesn't pause; strength records gap; cannot bill or close pour.

7. Cube samples lost en-route — moulds not labelled, kept loose; lost on transport; samples invalid.

8. Hot-weather precautions skipped — pour at 42°C without ice / chilled water / sun-shading; plastic-shrinkage cracking.

9. Pour during rain — pour permit issued in fair weather; weather deteriorates; pour continues; water dilutes top concrete; surface defects.

10. Construction joint not prepared — directly poured over previous lift; cold joint; weak plane.

11. Single-person approval — Site Engineer signs alone; QC + Consultant not consulted; accountability gap.

12. Photographs not taken — claim later "reinforcement was correct"; no evidence.

13. Curing material not staged — pour finishes 11 PM; nobody available to start curing till morning; first 8 hours dry; surface cracks.

14. Slump test skipped at later trucks — first truck slump OK; later trucks slump out of range; not detected.

15. Pour permit re-used — single permit for multiple pours; defeat of single-use principle; quality gap.

16. No NCR on deviations — minor deviations from drawing observed pre-pour but not formally documented; later disputes.

Companion formats: - Daily Concrete Pour Register (FMT-SIT-015) — pour record - Concrete Cube Test Log (FMT-SIT-013) — cube tracking - Slump Test Log (FMT-SIT-014) — workability - De-shuttering Permit (FMT-SIT-022) — post-pour formwork removal - Curing Register (FMT-SIT-025) - BBS Footing (FMT-SIT-004) — rebar production - Reinforcement Inspection Checklist — Hold Point #1 - Formwork Inspection Checklist — Hold Point #2

Codes: - IS 456:2000 — Plain + Reinforced Concrete (Cl. 13 — Curing, Cl. 15-16 — Sampling + Acceptance, Cl. 26 — Reinforcement) - IS 1199 Parts 1-7 — Sampling fresh + hardened concrete - IS 516 Part 1 Sec 1:2021 — Compressive Strength Tests - IS 10262:2019 — Concrete Mix Proportioning - IS 7861 Part 1:1975 — Hot Weather Concreting - IS 7861 Part 2:1981 — Cold Weather Concreting - IS 2502:1963 — Bending + Fixing of Reinforcement - IS 9013:1978 — Accelerated Curing - CPWD Specifications 2019 — Section 4 (Concrete) - MoRTH Specifications 2013 — Section 1700 (Concrete) - NHAI Quality Manual — for highway works - NBC 2016 Part 6 Section 5 — Concrete (Plain + Reinforced + Pre-stressed) - IS 13920:2016 — Seismic Detailing (Ductile Design)