When scaffolds are enclosed, what generally happens to the requirements for ties?

When scaffolds are enclosed, the requirements for ties generally increase, and the correct option reflects this. Enclosing scaffolds often adds additional wind load and stability requirements, which necessitate more ties to ensure the structure remains safe and secure. The additional surface area created by the enclosure can catch wind more easily, creating forces that the scaffold must be able to withstand. Therefore, additional ties become necessary to maintain structural integrity and to minimize the risk of the scaffolding tipping or swaying.

This increase in ties not only addresses the safety concerns posed by adverse weather conditions but also enhances the overall stability of the scaffold, ensuring it can support the loads applied to it, including the weight of workers and materials. The correct answer highlights the need for heightened safety measures in response to the changes brought by enclosing the scaffolding.