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4-3 Bandings

Bandings (strappings) include both metallicexample of  banding on a box. and nonmetallic banding and pressure-sensitive filament tape. Flat steel banding should have smooth or plastic-coated edges, and banding ends should be covered or protected. Twine or cord should not be used to close and reinforce a container; if used, it must be of at least 20-pound tensile strength and secured at an intersection at least once on each side of the container.

When a mailing container is closed and reinforced with banding (strapping), at least one band must encircle the length and a second band must encircle the girth. Loose strapping, especially metal, is not acceptable because it does not reinforce the container and because it constitutes a danger to Postal Service employees and mail processing equipment. The bands should be tight enough to depress the corners of the box.

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