Standard Test Method for Evaluation of Fire Resistance of Perimeter Fire Barrier Joint Systems
No temperature rise observed on the unexposed face throughout the entire 120-minute test duration.
No flame penetration observed at any time. Fire remained contained on the exposed side; barrier remained intact.
Horizontal barriers tested in a 150 mm wide void between slab and curtain wall assembly.
Roxul Rockwool Safe Plain, 120 mm thick. Installed with 10% compression using Z-bracket fixing method.
100 combined cycles at 30 cpm + 400 cycles at 10 cpm. No visible failure found on specimen.
Cotton pad test confirmed: no flames or hot gases passed through sufficiently to ignite the cotton pad at any stage.
Temperature: 30°C
Humidity: 65% RH
Wind Speed: 0.08 m/s
Firoblock Fire Barrier for 150 mm wide void found Compliant with all acceptance criteria of IS 18190:2023.
| # | Criterion | Requirement | Observation | Rating | Result |
|---|---|---|---|---|---|
| 1 | T-Rating (Temperature Rise) | Unexposed face rise ≤ 180°C above initial temp | All temps recorded on exposed side only. Unexposed face showed no temperature rise throughout test. | T – up to 120 min | ✓ PASS |
| 2 | T-Rating (Surface Thermocouple) | For joint > 100 mm: avg rise ≤ 139°C above initial | No heat transfer detected on unexposed face; temperature rise observed only on fire barrier. | T – up to 120 min | ✓ PASS |
| 3 | F-Rating (Flame Penetration) | No flame penetration through perimeter joint or curtain wall openings above barrier | No flame penetration at any time. Fire contained on exposed side; barrier remained intact. | F – up to 135 min | ✓ PASS |
| 4 | F-Rating (Hot Gas Integrity) | No passage of flames/hot gases to ignite cotton pad | Smoke observed only at exposed side (left & right splice centre). Cotton pad test — no ignition, no hot gas passage. | F – up to 135 min | ✓ PASS |
| Component | Product / Type | Material / Density | Dimensions | Fixing Method |
|---|---|---|---|---|
| Smoke Seal (FS) | Roxul Rockwool Safe Plain | 75 kg/m³ | 120 mm (T) × 165 mm (W) × 1200 mm (L) | Fixed with 10% compression via Z-bracket between exterior wall & floor, 4 m length |
| Spandrel Barrier (SP) | Roxul Rockwool Curtain Rock 80 | 128 kg/m³ | 1.2 m × 1.2 m, 50 mm thick | GI backpan + insulation pins + silicon sealant; exposed to room-side burner |
| Mullion Barrier (MP) | Roxul Rockwool Prorox SL 540 | 160 kg/m³ | 1.0 m × 0.6 m, 30 mm thick | Fixed behind mullion via SS screws 50 mm; exposed to room-side burner |
| Z Bracket | Stainless Steel 304 | SS 304 Grade | 235 mm (L) × 25 mm (W) × 2 mm (T) | One end fixed to floor assembly via screws; other end connected to smoke seal |
| Aluminium Foil Tape | — | Aluminium foil, 35 microns | 120 mm wide | Used at all butt joints between spandrel, fire barrier, and floor assembly |
Plot and compare average temperature data from the calibration test (Table 2) for different thermocouple heights above the floor of the test room.
Copper disc thermocouple temperatures on the unexposed face of the fire barrier (observation room side). Allowable limit = 210°C rise above initial temperature.
Estimate whether a given temperature rise at a sensor would meet the T-Rating criterion. Based on IS 18190:2023: unexposed face must not exceed 180°C rise above initial temperature (or 139°C for surface thermocouples when joint > 100 mm).