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BS ISO 21894:2020 Air cargo. Cargo stopper devices. Design and testing

BS ISO 21894:2020

Air cargo. Cargo stopper devices. Design and testing

CURRENCY
LANGUAGE
English
Standard number:BS ISO 21894:2020
Pages:18
Released:2020-03-03
ISBN:978 0 580 52451 6
Status:Standard
DESCRIPTION
This standard BS ISO 21894:2020 Air cargo. Cargo stopper devices. Design and testing is classified in these ICS categories:
  • 55.180.30 Air mode containers, pallets and nets

This document specifies the design, performance and testing requirements for “Cargo Stopper” air cargo restraint accessories with a 22 250 N (5 000 lbf) rated load capacity, to be used in conjunction with air cargo restraint straps meeting ISO 16049-1 (TSO/ETSO  ? C172), or air cargo restraint slings meeting ISO 20291-1, with the same rated load.

Cargo stopper devices designed to this document are intended to be used in either of the following typical instances:

  1. 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 long shaped 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;

  2. 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;

  3. when a crate containing cargo, even though its cross-section is large enough to be directly tied-down with the pallet net or restraint straps, contains or can contain a heavy item, e.g. a piece of machinery, 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 when subjected to in-flight accelerations, then pass due to their small size through the net mesh restraining the crate and be released into the cargo compartment.

  4. 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.


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