The Rib feature can only be created when which condition is met?

The Rib feature in NX is primarily used to add support and increase the strength of a model without significantly adding material. This feature is designed to be created within specific geometric conditions to ensure it performs correctly.

The correct choice indicates that the Rib can only be created in a pocket area where it extends down to the side walls. This is crucial because the Rib needs a base from which to rise and attach to these walls. By defining it in this way, the Rib feature ensures that there is a solid connection to the existing geometry, maximizing its strength and effectiveness.

Creating a Rib in a pocket allows for the rib to leverage the walls for stability, which enhances the model’s design integrity. If the Rib were to be placed in an open area without support, it might not provide the intended structural benefit, leading to a weaker design. Similarly, trying to create a Rib on a flat surface or within a predefined radius might not satisfy the necessary conditions for effective support, as they do not promote the rib’s functional design purpose.