Using magnets to hold an object in place on a large timber beam.

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A lighting designer is seeking a solution to secure a 500g LED light to 22" timber beams in a heritage building with low ceilings, where physical alterations are prohibited. The designer has previously used magnets and is inquiring about the feasibility of using them to hold the light in place without damaging the property. There is no gap between the beams and the ceiling, complicating the use of traditional mounting methods like clamps or scaffold pipes. Suggestions for alternative solutions, such as padded scaffold bars tied down with slings, were discussed but may not meet the director's aesthetic requirements. The conversation emphasizes the challenge of balancing safety and visual discretion in a constrained environment.
tomo2014
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I am a lighting designer for tv shows and I have a problem with a location that has very low ceilings and 22" timber beams running the width of a 30ft room. The location is a listed/heritage building and therefore we cannot cause any physical damage to the property including the ceiling. I have used magnets to hold equipment in place before but was curious to the strength of magnets required to hold a 500g (led light) in place, using the 22" wood beam as a anchor point.

So my question is, can magnets penetrate 22" of thick wood and if so how big would they have to be to hold 500g in place?

Thanks
Andy
 
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Ridiculously huge

How about a C-clamp with padded jaws?
 
Hi MrSpeedyBob

That would be the normal coarse of action but the director does not want to see clamps or scaffold pipes (pressed between the beams).

It was a long shot.

Thanks
Andy
 
Scaffold bars laid on top of the beams (with padding) tied down with padded slings.
 
Oh, do you mean that there is no gap between the ceiling and the beams?
 
Thats correct, their is no gap from the beam to the ceiling,and the show use multiple robotic cameras looking 360 degrees, so using traditional stands is out.

Thanks
Andy
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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