What is the primary function of a stopper knot?

The primary function of a stopper knot is to prevent a rope from slipping through a device. Stopper knots create a bulge at the end of the rope that cannot pass through rigging devices such as belay devices or carabiners, ensuring that the rope remains securely in place during climbing, rope access, or various other applications. This is particularly critical in maintaining safety when working at height, as it helps to prevent accidental release or slippage that could result in a fall.

Understanding the importance of stopper knots emphasizes their role in ensuring that systems remain stable and secure during use. Recognizing the various types of knots and their specific applications is fundamental for anyone working in rope access or climbing environments, highlighting the balance between safety and functionality.