CMU School of Drama


Sunday, March 25, 2007

Rigging Seminar - Design Factor

WorkingOnRigging (3:15:47 PM): Hi EProf,
WorkingOnRigging (3:15:56 PM): for the rigging assignment
WorkingOnRigging (3:16:18 PM): "under-hanging an electric from the tension grid"
WorkingOnRigging (3:18:14 PM): which definition of underhanging are we using
WorkingOnRigging (3:20:49 PM): and in general, does the rule of design factor being 10:1 if it is over the audience's head still hold true even if there is a structure there to catch it if it fails
WorkingOnRigging (3:48:24 PM): and when something has been proof loaded, you still take treat it with the same safety factors?
EProf (6:25:50 PM): underhanging
EProf (6:25:58 PM): like, hanging, under
WorkingOnRigging (6:26:18 PM): ok so it is actually under the grid
EProf (6:26:24 PM): yes
EProf (6:26:47 PM): and then, no, if it can't get to the people then 8:1 is fine
WorkingOnRigging (6:27:02 PM): k
EProf (6:27:19 PM): and with proof tested gear, it's judgment call
EProf (6:28:00 PM): but all you know is potentially .000001# less than a failure
WorkingOnRigging (6:28:33 PM): ok...so if i still have a normal design factor, it is still correct
WorkingOnRigging (6:28:39 PM): though may be overcautious
EProf (6:28:51 PM): something like that, yes
WorkingOnRigging (6:29:03 PM): ok thank you

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