For the Triskelion tripod, what is the MBS attached to the left-over pulley?

For the Triskelion tripod, what is the MBS attached to the left-over pulley?

• A. 36 kN (8,093 lbf)
• B. 8 kN (1,800 lbf)
• C. 22 kN (4,946 lbf)
• D. 40 kN (9,000 lbf)

Answer: (C)

A key idea here is how loads in a pulley system are limited by the weakest link in the load path. In the Triskelion tripod, the left-over pulley is part of a path where two rope strands converge and share the load. The maximum safe load for that pulley is determined by the rating of the rope segment that directly carries the load there. If that leg uses a rope/kit rated at 22 kN, then the left-over pulley cannot safely carry more than 22 kN, even if other parts of the system could handle higher loads. That makes 22 kN (4,946 lbf) the limiting value for that pulley. The other numbers would correspond to different components or configurations and are not the limiting rating for this specific pulley in this setup.

A key idea here is how loads in a pulley system are limited by the weakest link in the load path. In the Triskelion tripod, the left-over pulley is part of a path where two rope strands converge and share the load. The maximum safe load for that pulley is determined by the rating of the rope segment that directly carries the load there. If that leg uses a rope/kit rated at 22 kN, then the left-over pulley cannot safely carry more than 22 kN, even if other parts of the system could handle higher loads. That makes 22 kN (4,946 lbf) the limiting value for that pulley. The other numbers would correspond to different components or configurations and are not the limiting rating for this specific pulley in this setup.