MIL-DTL-27443F (USAF)
3.4.5 Traversable capabilities.
3.4.5.1 Conveyor. When uniformly loaded to rated capacity (see 6.3.1), the pallet shall be capable of
transversing roller conveyors with 2-inch diameter by 3.5 inch long rollers spaced on 10 inch centers.
The pallet shall be supported by four rows of conveyors, one row along each side, and one row along a
line 10 inches each side of the center line (see 4.5.6.1).
3.4.5.2 Conveyor ramp. When uniformly loaded to rated capacity (see 6.3.1), the pallet shall
withstand being towed over a 17o, 10-foot long ramp connecting two horizontal surfaces. The pallet
shall be supported by conveyors as specified (see 3.4.5.1). The pallet shall be towed parallel to both
88 and 108-inch sides for Type I pallets, and both the 54-inch and 88-inch sides for the Type II
(4.5.6.2).
3.4.6 Ultimate load. When uniformly loaded to rated capacity (see 6.3.1), the load being restrained to
the pallet by nets (see 6.3.4), the pallet installed between restraining rails locked to the rails by 2 locks
through each rail and engaging 2 lock notches on each side of the pallet, and resting on 4 rows of
conveyor as specified (see 3.4.5.1), the loaded pallet shall withstand a dynamic load of 3 times the
force of gravity (g's) for a period of 0.1 second. The pallet shall be serviceable after undergoing the
test. In addition, the pallet shall withstand a dynamic load of 8 g's for a period not less than 0.1 second.
The pallet need not be serviceable after undergoing such a load; however, the pallet shall remain in one
piece (see 4.5.7).
3.4.7 Environmental conditions. The pallet shall be capable operating in the following conditions
without permanent damage :
a. Temperatures ranging from -65o to +160o F (see 4.5.8.1, 4.5.8.2).
b. Rain (see 4.5.8.3).
c. Salt-sea atmosphere(see.4.5.8.4)
3.4.8 Mechanical properties.
a. The lap joint between the skin and rail sections shall meet the minimum average strength
requirements listed in MMM-A-132, Table I, test number 1 (see 4.5.9 a.).
b. After curing, the balsa core is the weakest component in a peel situation. An acceptable metal-
to-wood joint shall consist of not less than 100% wood failure in a peel situation (see 4.5.9 b.).
c. The surface of the pallet shall be capable of withstanding 900 pounds per square inch (see 4.5.9
c.).
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