Types of Suspension Scaffolds
A suspension scaffold is a type of platform that is suspended by ropes or other flexible means from an overhead structure. These scaffolds allow workers to raise or lower the platform to reach various work levels safely and efficiently.
According to OSHA 1926.450(b), suspension scaffolds include single-point, multipoint, multi-level, two-point, adjustable, boatswain’s chair, catenary, chimney hoist, continuous run, elevator false car, go-devils, interior hung, masons’, and stone setters’ scaffolds.
Below are two of the most common types used in construction and maintenance work.
1. Single-Point Adjustable Scaffold
A single-point adjustable scaffold consists of a platform suspended by one rope from an overhead support. The scaffold includes a mechanism that allows the platform to be raised or lowered to different work levels as needed.
This type is most commonly recognized as the boatswain’s chair, frequently used by window washers and maintenance workers on tall buildings.
Key Features:
- Suspended from a single rope or cable
- Adjustable to various heights for easy access
- Ideal for light-duty work such as window cleaning or exterior repairs
2. Two-Point (Swing-Stage) Scaffold
The two-point adjustable suspension scaffold, often referred to as a swing-stage scaffold, is the most commonly used suspended platform. It is supported by two ropes or cables, one on each end of the platform, which are attached to stirrups that allow vertical movement.
These scaffolds are a familiar sight on high-rise buildings, used extensively by window washers, painters, and exterior construction crews.
Key Features:
- Supported by ropes or cables at both ends
- Allows smooth vertical movement for large surface access
- Commonly used in high-rise construction, façade repairs, and maintenance