What is an important consideration regarding anchor angles for rappelling?

When considering anchor angles for rappelling, it is crucial that interior angles must be greater than 90° for proper load distribution. This is important because wider angles help to distribute the load more evenly between the anchors. If the angle between your connectors (the webbing or carabiners that link the anchors) is less than 90°, the forces could potentially concentrate on a smaller area, which increases the risk of failure of the anchors or the system as a whole.

In situations where the angle is more acute (less than 90°), the forces are not distributed effectively, which can lead to an added load on the individual anchors, potentially compromising safety. Maintaining an angle greater than 90° allows for a more stable rigging setup and enhances the overall safety of the rappelling operation.

Additionally, considering other aspects of anchor strength and placement height is important, but they don't directly address the specific concern of load distribution due to anchor angles. Therefore, ensuring that angles are appropriately set above 90° is foundational for safe rappelling scenarios.