Which of the following is NOT a type of anchor device used for fall arrest?

Static anchors are not recognized as a type of anchor device used for fall arrest. Fall arrest systems typically use anchors that can be categorized into fixed, portable, and mobile types. Fixed anchors are permanently installed to provide a secure attachment point, while portable anchors can be moved and set up in various locations, often allowing for greater flexibility on worksites. Mobile anchors are designed to move along a structure, accommodating workers who need to change positions without detaching from the safety system.

The term "static anchors" lacks formal recognition in the context of fall arrest systems, which is why it is not valid in this context. Understanding the types of anchors is crucial for ensuring safety in scaffolding and construction environments, where proper fall protection is essential.