Which is more mobile than rigging and used for structures less than 40 feet high?

• A. Scaffolds
• B. Rigging
• C. Float
• D. Boat

Answer: (A)

Mobility for site access is the key idea here. Scaffolds provide a portable, elevated work surface that can be moved along a structure as you progress, especially helpful for shorter buildings or sections under 40 feet tall. They’re designed to be assembled, repositioned, and reassembled quickly, which makes them more mobile on a job site than other methods that aren’t as easily relocated.

Rigging, by contrast, is about suspending loads or components with ropes and anchors. It’s effective for temporary supports or suspensions, but it isn’t as readily moved around the site as scaffolding once set up, and it’s used for different tasks rather than providing a mobile working platform.

Floats and boats aren’t used to access or work on structures on land, so they don’t fit the context.

So for structures under 40 feet, scaffolds offer the most practical mobility for accessing and working on the structure.