EN
ZHEN 12275:2013 Connectors
Mountaineering connectors come in a variety of shapes and sizes for different applications and are used to connect components together within a fall protection system.
Major / Minor Axis Static Strength
The major axis tests a connector in the main direction of loading. The minimum breaking strength required depends on the connectors class – see table below. Many connectors claim a higher rated load on the major axis than the minimum within the standard and for the purposes of certification are required to show evidence that this higher load can be achieved.
The minor axis test is applicable to connectors where it is possible for them to be loaded in the opposite direction to the Major axis. The test is to ensure that should the connector be accidentally loaded or misused across the minor axis, then it still has strength to take the forces generated in a fall.
| Description | Major axis Gate closed (kN) | Major axis Gate open (kN) | Minor axis Gate closed (kN) |
|---|---|---|---|
| Basic connector (class B) |
20 | 7a | 7 |
| HMS connector (class H) |
20 | 6a | 7 |
| Klettersteig connector (class K) |
25 | 8 | 7b |
| Specific anchor connector (class A) |
20 | 7a | - |
| Termination connector (class T) |
20 | 7a | - |
| Screwed closure connector (class Q) |
25 | - | 10 |
| Oval connector (class X) |
18 | 5a | 7 |
|
a No requirement if fitted with an automatic gate-locking device b Always required, even if the connector is also directional |
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Gate Forces
This section contains multiple tests to check the function of a connector gate. These include the following tests:.
- Self-closing gates - a minimum force of 5N is needed to create a gap of no more than 3mm on a connector gate
- Gate-open latches – the force required to latch a connector gate shall not be less than 10N and the force required to un-latch a gate shall not be greater than 15N
- Gate performance under load – when loaded on the major axis with a force of 800N, the connector gate shall still open a close fully
Gate Resistance (Face / Side)
The gate face test is carried out on connectors by applying a force directly to the gate of 1kN for 60 seconds. During the test the gate cannot separate from the latch by more than 1mm and following the test the gate should still function correctly
The gate side test is carried out on connectors by applying a force directly on the side of the gate of 1.5kN for 60 seconds. During the test the gate cannot separate from the latch by more than 1mm and following the test the gate should still function correctly