Explosive Storage Requirements - Table of Distances

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Table of Distances

The federal explosive regulations require explosives storage magazines to be located certain minimum distances from inhabited buildings, public highways, passenger railways, and other magazines based on the quantity of explosive materials in each magazine. These tables of distance were adopted to protect the public in the event of a magazine explosion. Click here to view the Tables of Distances. Click here to view the Table of Distance Requirements (ATF P 5400.25).

  • Tables of distances apply to the outdoor storage of explosive materials.

  • When determining the distance from a magazine to a highway, an individual should measure from the nearest edge of the magazine to the nearest edge of the highway.

  • If any two or more magazines are separated by less than the specified distance, then the weights in the magazines must be combined and considered as one.

  • Each type of explosive has a specific table of distance:

    • 27 CFR § 555.218 is for storage of high explosives (including flash powder and bulk salutes), blasting agents, and display fireworks over 10,000 pounds.

    • 27 CFR § 555.219 is for storage of low explosives.

    • 27 CFR § 555.220 is for storage of ammonium nitrate and blasting agents from explosives or blasting agents.

    • 27 CFR § 555.222 is for distances between fireworks process buildings and between fireworks process and non-process buildings.

    • 27 CFR § 555.223 is for distances between fireworks process buildings and other areas.

    • 27 CFR § 555.224 is for storage of display fireworks (except bulk salutes).

  • Barricading can significantly reduce the required minimum distances under some Tables of Distances.

Last Reviewed March 3, 2020