ISO 21853:2020 pdf free.Kite boarding一Release system一Safety requirements and test methods.
4 Safety requirements
4.1 General
After each use, the release system shall not show signs of permanent deformation or of having been affected by the triggering in any way that could provoke malfunction.
Test in accordance with 5.&.
4.2 Strength
The main release system shall withstand a load of three times the maximum user weight as intended by the manufacturer or 3 600 N, whichever is greater, without any breakage and shall still function as intended by the manufacturer.
The disconnecting release system and the connecting link, if used, shall withstand a load of two times the maximum user weight as intended by the manufacturer or 2 400 N, whichever is greater, without any breakage and shall still function as intended by the manufacturer.
Test in accordance with 5.6.2.
4.3 Design
The design of the release system shall indicate how to trigger it. The direction of triggering shall be permanently identifiable.Test in accordance with 5.
EXAMPLE An example for this is a 3D structure (such as an embossed or elevated arrow) on the surface, or a colour.
The part of the release system which is used for triggering, i.e. the triggering element, shall have a contrasting colour to the other parts of the release system, predominantly (>50 %) in red on its visible surface. The other parts of the release system shall not be in contrasting colours to each other.
The release system should be free from finger entrapments, squeeze and shear points. Edges that could come into contact with the user’s hands during use or handling and maintenance should not be sharp, e.g. deburred, broken, rolled or processed with comparable techniques. Test in accordance with 5.7.
The space of activation shall not be restricted at any time by any part of the control system and by any part/component of the release system.
NOTE This also relates to soft parts/components of the release system which could, while being gripped and used for triggering, deform and/or tilt and consequently obstruct the actual movement of triggering.
While being triggered, no part/component of the release system should impact the user’s hands.
4.4 Handling
4.4.1 General
It shall be possible to trigger the main release system by a first single action.
It shall be possible to trigger the disconnecting release system it by a second single action.
The action for triggering shall be ergonomically and kinematically suitable for the physiological movements of the user.
It should be possible to trigger the main release system/disconnecting release system with garments, e.g. gloves.
4.4.2 Triggering force
The force to perform the act of triggering shall be ≥20 N and ≤170 N.
Test in accordance with 5.6.1 in relation to certain conditions (see 5.6.3.1. 5.6.3.2. 5.6.4. 5.6.5 and, if appropriate, 5.6.6).
The release system shall not show signs of plastic deformation or of having been affected by the tests in any way that could provoke malfunction.
4.4.3 Release force
It shall be possible to trigger the main release system and/or disconnecting release system with one hand only, without any load simulating the pulling force of the kite.
Test in accordance with 5.5.2.
ISO 21853 pdf download.