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Home > About USPS & News > Forms & Publications > Postal Periodicals and Publications > Publications > Publication 2 - Packaging for Mailing > 4 Closing, Sealing, and Reinforcing > 4-3 Bandings
Bandings (strappings) include both metallic
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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