ISO 21894-2020 pdf free.Air cargo — Cargo stopper devices —Design and testing.
This document specifies the design, performance and testing requirements for “Cargo Stopper”aircargo restraint accessories with a 22 250 N (5 000 lbf) rated load capacity, to be used in conjunctionwith air cargo restraint straps meeting IS0 16049-1 (TSO/ETSO-C172), or air cargo restraint slingsmeeting ISO 20291-1, with the same rated load.
Cargo stopper devices designed to this document are intended to be used in either of the followingtypical instances:
a) to ensure restraint/tie-down of a piece of cargo that does not lend itself to either direct hooking of tie-down straps or passing a strap around without risk of slippage; a common example is longshaped cargo items with a narrow cross-section,whether or not overhanging from the pallet,individual or in bundles, e.g. pipes or beams; see ISO 16049-2:2020,7.4;
b) to restrain cargo smaller than the pallet net’s mesh, or identified as “piercing” cargo, presenting a hazard to the aircraft in the event of it being released during flight;
c)when a crate containing cargo, even though its cross-section is large enough to be directly tieddown with the pallet net or restraint straps, contains or can contain a heavy item, e.g. a piece ofmachinery, shaft, or similar, with a cross-section lower than the pallet net’s mesh size;NOTE Such “hidden”items have been known to break free from insufficiently strong crates whensubjected to in-flight accelerations, then pass due to their small size through the net mesh restraining thecrate and be released into the cargo compartment.
d) to assist in tying-down odd-shaped cargo pieces where it is difficult or not allowed to directly attach tie-down straps or pass them around the load in an effective manner.
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document.For dated references, only the edition cited applies. Forundated references, the latest edition of the referenced document (including any amendments) applies.ISO 21894 pdf download.