• The supporting rope between the scaffold and the suspension device must be kept vertical unless:
  
  
  • The rigging has been designed by a qualified person, [1926.452(o)(2)(i)]
    
  
  
  • The scaffold is accessible to rescuers, [1926.452(o)(2)(ii)]
    
  
  
  • The support rope is protected from rubbing during direction changes [1926.452(o)(2)(iii)], and
    
  
  
  • The scaffold is positioned so swinging cannot bring it into contact with other surfaces, [1926.452(o)(2)(iv)]
    
  
  
• When combining two single-point scaffolds to form a two-point suspension system, the resulting scaffold must comply with 1926.452(p) requirements. [1926.452(o)(1)]

• The maximum intended load for these single-point adjustable suspension scaffolds is 250 lbs. [1926 Subpart L Appendix A (o)]

• Boatswain's chair tackle must consist of:
  
  
  • Correct-size ball bearings or bushed blocks containing safety hooks, and
    
  
  
  • Properly eye-spliced first-grade manila rope, or other rope of equivalent strength, durability, etc. [1926.452(o)(3)].
  
  
• Seat slings must:
  
  
  • Pass through four corner holes in the seat,
    
  
  
  • Cross on the underside of the seat,
    
  
  
  • Be rigged to prevent slippage which could cause the chair to be out-of-level [1926.452(o)(4)], and
    
  
  
  • Be at least 5/8-inch diameter fiber, synthetic, or other first-grade manila rope of equivalent criteria (strength, slip resistance, durability, etc.). [1926.452(o)(5)]
  
  
• Seat slings used for gas or arc welding must be made of at least 3/8-inch wire rope. [1926.452(o)(6)]
  


• Non-cross-laminated wood chairs must be reinforced on the underside with cleats to keep the board from splitting. [1926.452(o)(7)]

Non-mandatory guidelines from Subpart L Appendix A:

• Wood seats for boatswain's chairs must be:
  
  
  • Not less than 1 inch thick (if made of non-laminated wood), or
    
  
  
  • 5/8-inch thick (if made of marine-quality plywood). [1926 Subpart L Appendix A (o)]