MIL-DTL-27443F (USAF)
3.4.2 Tie down rings.
3.4.2.1 Ring location and movement. Tie down rings shall be provided according to the requirements
herein and applicable drawings 7031843 or 7133047. When not used for tie down, the rings shall not
interfere with the entry of the pallet into a rail section. The pivot point of the ring shall be outside the
usable surface edge. Each ring shall be capable of at least 225o of free movement in a vertical plane that
intersects the pallet edge at right angles (see 4.5.3.1).
3.4.2.2 Ring capacity one. Each ring shall be designed to sustain a 7,500 pound tension load along any
line in a vertical plane that intersects the pallet edge at right angles within the angular limits (see 4.5.3.2).
3.4.2.3 Ring capacity two. Each ring shall also be designed to sustain a 7,500 pound load along any
line originating at the attachment point in a vertical plane extending above the pallet and parallel to the
edge without permanent deformation (see 4.5.3.3).
3.4.2.4 Ring capacity three. The rings shall be designed such that two adjacent corner rings can be
pulled simultaneously and then two center rings pulled simultaneously without permanent deformation
(see 4.5.3.4).
3.4.3 Static load. When supported by conveyors as specified (see 3.4.5.1), the pallet shall be capable
of supporting a uniformly distributed static load (see 6.3.2) for 40 hours without permanent deformation
(see 4.5.4).
3.4.4 Lifting capabilities.
3.4.4.1 Corner lifting. When uniformly loaded (see 6.3.3), the pallet shall be capable of withstanding,
without permanent deformation, lifting by means of 4 cables attached to the 4 tie down rings adjacent to
the 4 corners (see 4.5.5.1).
3.4.4.2 Forklift lifting. When uniformly loaded to rated capacity (see 6.3.1), a pallet shall withstand
lifting from a conveyor (see 3.4.5.1) without deformation. A forklift truck having 72 inch long by 6 to 8
inch wide tines spaced 42 inches center-to-center shall lift the Type I pallets. A forklift truck having 54
inches long by 6 inches wide tines spaced 42 inches center-to-center shall lift the Type II pallets.
Forklift truck tines shall have an end radius of not less than 0.250 inch (see 4.5.5.2).
3.4.4.3 Forklift "wedge" lifting. When uniformly loaded to rated capacity (see 6.3.1), a pallet shall
withstand lifting from a smooth, dry, concrete surface without deformation. The tines shall be wedged
under the pallet perpendicular to a pallet rail. A forklift truck having 72 inch long by 6 to 8 inch wide
tines spaced 42 inches center-to-center shall lift the Type I pallets. A forklift truck having 54 inches
long by 6 inches wide tines spaced 42 inches center-to-center shall lift the Type II pallets. Forklift truck
tines, with an end radius of not less than 0.250 inch (see 4.5.5.3).
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