Ask X3What does 49 CFR 178.512 (Standards for steel, aluminum or other metal boxes) require?
Generated guidance. Confirm the source and its applicability before you act. How we check sources.
Based on 49 CFR 178.512, the requirements for steel, aluminum, or other metal boxes are as follows:
* Identification Codes: Use the correct code based on the metal type: 4A for steel, 4B for aluminum, and 4N for other metal boxes.
* Strength and Construction: The strength of the metal and the way the box is built must match its capacity and how you plan to use it.
* Liners and Coatings: Boxes must either have an inner liner (or coating) made of suitable material per 49 CFR part 173, subpart C, or be lined with fiberboard or felt packing pieces. If you use a double-seamed metal liner, you must take steps to keep materials (especially explosives) out of the seam recesses.
* Closures: Closures can be any suitable type, but they must stay securely fastened under normal transport conditions.
* Weight Limit: The maximum net mass of the box cannot exceed 400 kg (882 pounds).