1926.452(o) Single-Point Suspension

Single-point adjustable suspension scaffolds

When two single-point adjustable suspension scaffolds are combined to form a two-point adjustable suspension scaffold.

The resulting two-point scaffold shall comply with the requirements for two-point adjustable suspension scaffolds.

The supporting rope between the scaffold and the suspension device shall be kept vertical unless all the following conditions are met.

The rigging has been designed by a qualified person and the scaffold is accessible to rescuers and the supporting rope is protected to ensure that it will not chafe at any point where a change in direction occurs, and the scaffold is positioned so that swinging cannot bring the scaffold into contact with another surface.

Boatswains’ chair tackle shall consist of correct size ball bearings or bushed blocks containing safety hooks and properly and the scaffold is positioned so that swinging cannot bring the scaffold into contact with another surface.

Boatswains’ chair seat slings shall be reeved through four corner holes in the seat; shall cross each other on the underside of the seat; and shall be rigged to prevent slippage which could cause an out-of-level condition.

Boatswains’ chair seat slings shall be a minimum of five-eight (5/8) inch (1.6 cm) diameter fiber, synthetic, or other rope which will satisfy the criteria (e.g., strength, slip resistance, durability, etc.) of first grade manila rope.

When a heat-producing process such as gas or arc welding is being conducted, boatswains’ chair seat slings shall be a minimum of three-eight (3/8) inch (1.0 cm) wire rope.

Non-cross-laminated wood boatswains’ chairs shall be reinforced on their underside by cleats securely fastened to prevent the board from splitting.

Specific Requirements!

The supporting rope between the scaffold and the suspension device must be kept vertical unless:

The rigging has been designed by a qualified person.

The scaffold is accessible to rescuers.

The support rope is protected from rubbing during direction changes.

The scaffold is positioned so swinging cannot bring it into contact with other surfaces.