Just posted on the ERS Facebook page the following. Link at the bottom of this post should take you to the video.
“Sometimes the finished results are worth all the challenges, and who doesn’t love a good rigging challenge.
ERS designed and installed a new Oleo drop for the Barre Opera House that replaced the original drop.
Some details:
- Drop painted by Cobalt Studios (cobaltstudios.net)
- Tube is a pair of 20’ long by 8” diameter schedule 40 aluminum pipe spliced together with steel mending plates (engineered by Clark Reder Engineering Inc.) total weight approx 400lbs.
- Rigged as a double purchase manual counter weight system with a single wire guided arbor. Since the tube moves as it spins, it’s not a 1:1 ratio of arbor travel to tube travel. Since the tube is 8” in diameter we have a roughly 2:1 ratio (25.13” circumference). To have enough arbor travel distance we had to go with a double purchase system for our roughly 20’ of tube travel. Arbor, rope lock, and blocks supplied by J.R. Clancy.
- A pair of 1/4” GAC wire rope lift lines are wrapped in opposition to the drape. So as the drape lowers and unwraps, the wire rope wraps onto the tube. And vice versa when moving up. Much of the weight is actually supported by the drape itself.
On to the next one!”
“Sometimes the finished results are worth all the challenges, and who doesn’t love a good rigging challenge.
ERS designed and installed a new Oleo drop for the Barre Opera House that replaced the original drop.
Some details:
- Drop painted by Cobalt Studios (cobaltstudios.net)
- Tube is a pair of 20’ long by 8” diameter schedule 40 aluminum pipe spliced together with steel mending plates (engineered by Clark Reder Engineering Inc.) total weight approx 400lbs.
- Rigged as a double purchase manual counter weight system with a single wire guided arbor. Since the tube moves as it spins, it’s not a 1:1 ratio of arbor travel to tube travel. Since the tube is 8” in diameter we have a roughly 2:1 ratio (25.13” circumference). To have enough arbor travel distance we had to go with a double purchase system for our roughly 20’ of tube travel. Arbor, rope lock, and blocks supplied by J.R. Clancy.
- A pair of 1/4” GAC wire rope lift lines are wrapped in opposition to the drape. So as the drape lowers and unwraps, the wire rope wraps onto the tube. And vice versa when moving up. Much of the weight is actually supported by the drape itself.
On to the next one!”
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