Code Library › Volume 1 › Section 3.3 — Safety Within Floor Areas (See Note A-3.3.)
PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code

3.3.6.6.Ammonium Nitrate Storage

(1) Where the Fire Code made under the Fire Protection and Prevention Act, 1997 applies due to the quantity and nature of the stored product, a building intended for the storage of ammonium nitrate shall (a) be not more than one storey in building height, (b) not contain a basement or a crawl space, (c) not contain open floor drains, tunnels, elevator pits or other pockets that might trap molten ammonium nitrate, (d) have noncombustible flooring materials in storage areas, (e) be designed to prevent the ammonium nitrate from coming into contact with building materials that (i) will cause the ammonium nitrate to become unstable, (ii) may corrode or deteriorate by reason of contact with the ammonium nitrate, or (iii) will become impregnated with the ammonium nitrate, and (f) have not less than 0.007 m2 of vent area for each square metre of storage area, unless mechanical ventilation is provided. (See Note A-3.3.6.6.(1))
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.