How should a carabiner be loaded to maximize strength?

Loading a carabiner on the long axis maximizes its strength because this orientation allows the carabiner to fully utilize its design and material integrity, producing the least amount of stress and bending forces. The long axis is the strongest dimension of the carabiner, as it is where the majority of the load can be distributed evenly along the shape of the spine, which is the strongest part of the carabiner.

If a carabiner is loaded on the short axis, it can lead to a significantly reduced strength capacity. The design is not optimized for strength in that orientation, making it more susceptible to breaking or deforming under load. Similarly, loading a carabiner perpendicular to the spine introduces unnecessary stress that can compromise its structural integrity, and loading at an angle creates uneven weight distribution that can also weaken the carabiner's performance. Understanding the correct loading method is essential for safety and effectiveness in rescue scenarios.