What type of rope is primarily used in most rope access systems for backup?

In most rope access systems, the primary type of rope used for backups is a low stretch rope. Low stretch ropes are designed to minimize elongation under load, which is crucial in rope access operations where precision and safety are paramount. The reduced stretch of this type of rope allows for better control and stability during ascent, descent, or while suspended, significantly reducing the risk of swinging or dynamic forces that could compromise safety.

Static ropes, while they also have low stretch characteristics, typically refer to ropes that fall under a stricter definition of being rated for static loads rather than dynamic uses. In contrast, dynamic ropes are designed to absorb energy from falls and are commonly used in climbing scenarios where falls might be more frequent. High stretch ropes are not suited for safety-critical applications, as their high elongation can lead to unpredictable movement, which is undesirable in rope access situations where stability is critical. This is why low stretch rope is the ideal choice for backup systems in rope access work.