ISO 21894:2020
空运货物 货物止动装置 设计和测试

Air cargo — Cargo stopper devices — Design and testing

标准号

ISO 21894:2020

发布

2020年

发布单位

国际标准化组织

当前最新

ISO 21894:2020

 

 

引用标准

ISO 10254 ISO 12236 ISO 16049-1 ISO 16049-2 ISO 7166 ISO 9788

适用范围

This document specifies the design, performance and testing requirements for “Cargo Stopper” air cargo restraint accessories with a 22250 N (5000 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: 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 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; 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 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. 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.

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