What are the three main types of scaffolds used in construction?

The three main types of scaffolds used in construction are supported scaffolds, suspended scaffolds, and aerial lifts. Each of these types serves a specific purpose and is designed to meet different needs on job sites.

Supported scaffolds are the most common type; they consist of platforms supported by beams or frames. They are usually stationary and are ideal for providing stable working platforms for workers at various heights.

Suspended scaffolds hang from a building or structure and are used when work needs to be done on the exterior of a building, such as window washing or facade repairs. This type allows workers to easily access higher areas that cannot be reached with supported scaffolds.

Aerial lifts are mechanical devices that can lift personnel and equipment to elevated work areas. They include scissor lifts and boom lifts, which offer the flexibility of mobility for accessing heights while providing a stable platform.

The other options mention types that do not correctly categorize scaffolds as they are understood in construction safety protocols. While some choices may contain terms relevant in construction, they do not accurately identify the standard scaffold types recognized by OSHA.