How many riggers does it take...
If a ceiling flat, say 12'x12', is rigged from two system pipes, say 12' apart, and the downstage edge of the flat plays 4' above the upstage edge, which lineset sees more load?
Downstage set?
Upstage set?
Equal load?
It depends?
This shouldn't be this difficult to figure out.
Of course I will assume that the answer is it depends. Harry suggests that it depends on the relationship between the center of mass and the position of each support. Which I guess I buy. Looking at the torque it seems like everything ought to cancel and the loads should be equal - but equal seems a little counter-intuitive.
But maybe the answer is counter-intuitive.
Just 8 more hours of question reviewing tomorrow. Woohoo!!!
Thursday, July 28, 2005
Question of the Day
Subscribe to:
Post Comments (Atom)
2 comments:
hmm... will the lines both shift in 1.5 feet or will one line remain vertical and the other move in 3? i dont know... i should have taken structures...
Harry is right- more specifically, it depends on the HORIZONTAL distances between the picks and the COG of the unit.
If the picks are vertical (pulling in a purely vertical direction) and are the same horizontal distance from the COG of the panel, the picks will bear the same weight regardless of the panel's orientation.
Post a Comment