Every carabiner is marked with strength values in kN. Knowing what they mean helps you specify the right connector for rope access, rescue and industrial safety.
Major axis
The strongest loading direction, typically 20–35 kN on aluminium carabiners.
Minor axis
Side loading strength, usually lower than major axis. Avoid cross-loading in critical systems.
Gate open
Strength when the gate is not fully closed. Screw-lock and auto-lock gates reduce this risk.