Recent content by Euphroe

  1. Euphroe

    How wide do stairs need to be to not require a railing or point me in the OSHA regulation please?

    On the other hand, there's this: http://s15.a2zinc.net/clients/USITT/USITT2013/Custom/Handout/Speaker0_Session445_1.pdf. . . indicating that rails etc. do apply unless the performers have been specifically trained to deal with stage-edges, etc.I've dealt with a lot of aerials/circus where...
  2. Euphroe

    How wide do stairs need to be to not require a railing or point me in the OSHA regulation please?

    If this is in-audience-view, performers can unicycle a flaming tightrope 50' above a shark tank. No safety rails on the tightrope, or harness or anything.Well, you'd need a pyro permit for the flames, and probably some kind of permit for the live animals.Performers backstage are covered by...
  3. Euphroe

    Rigging in new auditorium?

    A high school student who requested the drawings, pulled out the plan view and asked for interpretation? That's really great. If you want to blow somebody away, look up Symmes et al. , phone them, ask for the project architect for the school, and ask if the auditorium elevation or detail sheets...
  4. Euphroe

    Tying knots in aircraft cable.

    Thinking back and I am pretty sure I learned the circus hitch from Peter Foy, who shared that and a lot of other dangerous information that MikeJ would throw down the memory hole. He differs in that regard from Foy, Donovan, Paulson, Glerum, Higgs . . . and Hall, who neither feared/fear...
  5. Euphroe

    Tying knots in aircraft cable.

    Go Delbert! This is the kind of knowledge that should be preserved even if superceded.Like the flipline hitch in wire core rope:Competent riggers know how to use every gadget in the catalog. Really good riggers can meet a challenge safely without the gadgets if necessary.
  6. Euphroe

    Learning to rig

    Master Rigging Weekend w/ Prof. Delbert Hall https://www.facebook.com/events/248614985325099/Look into the above, quickly because it's 19 - 20 July (two weeks from today). Also buy his book, and Harry Donovan's.To learn rigging, gravitate toward the riggers, stay humble, listen and watch...
  7. Euphroe

    Ringling Bros. Accident

    People who build aerial rigging are accustomed to dealing with components from different industries. It's the nature of the work and there's nothing wrong with that. They just break everything down to MBS and settle on a unit of measure.Crosby uses a 6:1 for shackle WLLs...
  8. Euphroe

    Motorized Fly System

    I don't know the theatrical vendors/contractors in your area. But one way to get help is to ask a theatrical supply house with a rigging department to come quote a motorized system, or curtains, or anything. Once they're on site you can pick their brain more or less for free. Try to reciprocate...
  9. Euphroe

    Motorized Fly System

    +1 on this.
  10. Euphroe

    Fire Curtains. What dictates whether one should be in a space?

    I am sure Bill deals with these subjects more than I have recently. But it appears the requirement for a fire curtain is triggered by the code applicable to the proscenium wall:http://publicecodes.cyberregs.com/icod/ibc/2012/icod_ibc_2012_4_par255.htmI know previously the proscenium opening...
  11. Euphroe

    Griplock vs Verlock

    See also Gripples, and Strand Vises.Re static vs. non-static, etc., keep aware that at least one of the devices mentioned on this thread can simply unscrew. If you deadhang something on a single point and the wind rotates it, etc., you could drop it.(The classic story in that genre is the...
  12. Euphroe

    Trim Chains

    PLASA defines WLL by reference to MBS, and MBS by reference to WLL. The formula is circular until you define one or the other. PLASA does not say that WLL = winch rated capacity."Characteristic load"? "Peak load"? More variables.Here's what happens in the real world:Client orders winches...
  13. Euphroe

    Trim Chains

    Because it's all relative, but it's my job to make sure the rope does not break. The flat might disintegrate without hitting anything, the girl might fall off the cloud swing because she has the flu etc., but the rope is never supposed to break. Nobody should spec a winch system where the wire...
  14. Euphroe

    Trim Chains

    Bingo. DuckJordan gets it.The guy buying the winch designs the rig, but the winch vendor is under market pressure to supply what the buyer wants.After the accident, the winch vendor blames the buyer who designed the rig with too-small wire rope, and the buyer blames the winch vendor for...
  15. Euphroe

    Trim Chains

    Well that explains that. Next time I rig "How To Train Your Dragon" or Lady Gaga I'll be able to understand why those shows didn't fall down the last time I rigged them. Still confused about the 3/4" shackles on the apex of the deuces but you can math that for me when I'm more advanced...
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