Combustibility
The Building Code Of Australia requires all ducts to be constructed from non-combustible materials.

Fibre reinforced concrete Sanishute™ Pipes are deemed non-combustible in accordance with the Building Code of Australia Specifications C1.1 Clause 2.5(e).

Early Fire Hazard Indices
To Australian Standard AS 1530.3:1989

Index Result
Ignitibility  = 0
Flame Spread  = 0
Heat Evolved = 0
Smoke Developed = 0-1
Note: Zero is the best possible result

Fire Rated Chutes
For virtually all medium to high rise buildings, the Building Code of Australia requires all ducts (not used for the discharge of hot products of combustion) to be fire rated. This is most easily achieved by constructing a fire rated enclosure from slab to slab around the ducts, incorporating fire rated access doors.