The Slab Duct System is a galvanized steel duct and formed fittings system embedded in the structural concrete floors of high rise buildings and includes intumescent pads for fire resistance. Its primary use is to exhaust air from bathroom fans, range hoods and clothes dryers.
FIRE RATINGS
| ASTM E814 and CAN/ULC S115 |
| Fitting Type |
Intumescent Pad |
Slab Thickness |
F Rating (min) |
T Rating (min) |
Design Listing |
| 4” diameter Inlet Boot |
N/A |
8 inch |
240 |
168 |
5AL-MD 240-01 |
| 6” diameter Inlet Boot |
2.00 mm pad |
8 inch |
240 |
240 |
5AL-MD 240-01 |
| 8” diameter Inlet Boot |
2.00 mm pad |
8 inch |
240 |
168 |
5AL-MD 240-01 |
