10-Phase Inspection Gates
These inspection checkpoints match the 10 phases in the Installation Sequence. Each [HP] hold point is a mandatory stop — no work proceeds until sign-off is documented.
| Phase | Hold Point | Inspector | Documentation Required | Pass Criteria |
|---|---|---|---|---|
| 1 — Prep & Demo | [HP] Column isolation plan | Structural engineer | Column isolation approach drawing | 10mm clearance confirmed at COL_W and COL_E |
| 2 — MEP First Fix | [HP] Conduit routing | MEP inspector | Conduit layout, putty pad locations | No back-to-back boxes, all sleeves oversized |
| 3 — Float Floor | [HP] Perimeter gap | Acoustic consultant | Gap measurement photos (all walls) | 25mm continuous gap, Sylomer full coverage |
| 4 — Wall Framing | [HP] Column clearance | Acoustic consultant | Clearance measurements at both columns | No rigid contact at COL_W or COL_E |
| 5 — Cavity Fill | Visual only | Site supervisor | Photo documentation | Green Glue coverage, cavity fill completeness |
| 6 — HVAC Rough-In | [HP] NC pre-test | HVAC contractor | NC measurement report | Silencer positions correct, NC within range |
| 7 — Plenum & Ceiling | [HP] Plenum barriers | Acoustic consultant | Visual inspection photos | Barriers at every partition, ceiling at 275cm AFF |
| 8 — Doors & Windows | [HP] Door test | Acoustic consultant | Light test + slam test results | No visible light gap, drop seal functions |
| 9 — Electrical | [HP] Circuit test | Electrical inspector | Circuit labeling, test results | All circuits tested, IG verified |
| 10 — Treatment & Commission | [HP] FINAL | Acoustic consultant + owner | NC + RT60 + STC test reports | All tests pass, handover package complete |
Cannot Proceed Until...
| Phase | Cannot Start Until |
|---|---|
| Phase 2 (MEP) | Phase 1 [HP] signed: structural engineer approves column isolation |
| Phase 3 (Float Floor) | Phase 2 [HP] signed: MEP inspector approves conduit routing |
| Phase 4 (Wall Framing) | Phase 3 [HP] signed: acoustic consultant approves float floor |
| Phase 5 (Cavity Fill) | Phase 4 [HP] signed: acoustic consultant approves column clearance |
| Phase 6 (HVAC) | Phase 5 visual inspection documented |
| Phase 7 (Ceiling) | Phase 6 [HP] signed: HVAC contractor NC pre-test passes |
| Phase 8 (Doors) | Phase 7 [HP] signed: plenum barriers verified at all partitions |
| Phase 9 (Electrical) | Phase 8 [HP] signed: all doors pass light + slam test |
| Phase 10 (Treatment) | Phase 9 [HP] signed: electrical inspector sign-off |
| Owner Handover | Phase 10 [HP] signed: ALL NC + RT60 + STC tests pass |
Handover Package Checklist
| Document | Provided? | Notes |
|---|---|---|
| NC test reports (all 4 rooms) | ☐ | With HVAC running |
| RT60 test reports (all 4 rooms, 6 bands) | ☐ | ASTM E2235 |
| STC field test (Wall 7 + D4) | ☐ | ASTM E336 |
| HVAC crosstalk test (Control ↔ Editing) | ☐ | Pink noise method |
| As-built drawings | ☐ | Reflecting any field changes |
| Product data sheets | ☐ | All acoustic products installed |
| Warranty documents | ☐ | Doors, windows, HVAC, treatment |
| SSOT v3.7 reference copy | ☐ | Locked design basis |
| Inspection sign-off sheets (Phases 1–10) | ☐ | All [HP] documented |
| Photo documentation | ☐ | Before close-up at each phase |