Ask X3What does 49 CFR 178.513 (Standards for boxes of natural wood) require?
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Based on 49 CFR 178.513, natural wood boxes must meet the following requirements:
* Identification Codes: Use code 4C1 for an ordinary box, and 4C2 for a box with sift-proof walls.
* Materials: The wood must be well-seasoned, commercially dry, and free from defects that would significantly reduce its strength. The material strength and construction method must match the box's capacity and intended use. Tops and bottoms may use water-resistant reconstituted wood (such as hard board or particle board).
* Fastenings: Fastenings must resist normal transportation vibrations. Avoid end-grain nailing whenever possible. Use clenched nails, annular ring nails, or equivalent fastenings for joints facing high stress.
* 4C2 Box Construction: Each part of a 4C2 box must be a single piece or an approved equivalent. Equivalents include glued assemblies using a Linderman joint, tongue and groove joint, ship lap or rabbet joint, or a butt joint secured with at least two corrugated metal fasteners per joint.
* Weight Limit: The maximum net mass for the box is 400 kg (882 pounds).