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Stage Deck


lizardaudio

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We have just got a new global truss deck and wondered if there is a maximum height you can use it at, cant find any information from manufacturer, or can it be used at any height as long as legs are crossbraced and all the other usual bits of safety are applied ?
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All gone quiet round here? Maybe if you posted a link to the staging in question someone would venture an opinion but, just for myself, "global truss deck" means absolutely nothing.

The side issue here is, why on earth are you buying new kit then asking weird strangers on the interweb like me how to use it?

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You can find global truss deck here https://prolight.co.uk/, we have a stock of it and use it for conferences etc up to 1m so low level but had a customer want to dry hire some and use at 2.5m and wondered where we stood with it, although we were not installing it it got me thinking what the maximum height would be, when we have done sound on some stages by other companies they are 3m+ in the air fully crossbraced like a scaffolding company has been underneath.

 

Just wondered peoples thoughts really.

 

Thanks

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A quick google found the manufacturer - Global Truss and they only do legs up to 1.4m. I would ask them what the height limits and the bracing requirements are for anything higher than this.

 

 

I'm not trying to be difficult or short with you, I've just been on the receiving end of some very dodgy stage setups and had to say "You are not using that on this stage!" rather forcefully after a visiting company built a strange construction out of scaff that had a 9m x 2.4m bridge with only three tubes under it. The bridge had a deflection of about 20cm in the middle with only a couple of crew on it, they wanted to put 8 - 12 dancers on it.

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Surely the manufacturer is the only source of the definitive answer. What exactly was their response when you asked them? I'd be amazed if they just refused to answer.
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Well ultimately it doesn't make any difference at all to the deck or the forces on it whether it's 1 inch off the ground or 100ft - the deck itself is always submitted to the exact same stresses no matter how high it is.

 

The only thing that does experience different forces dependent on the height are the legs - you will have to get the manufacturer and or a structural engineer's guidance as to the best materials, cross-bracing and maybe even outriggers needed for the height your client wants to achieve.

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the deck itself is always submitted to the exact same stresses no matter how high it is.

 

Surely the turning moment at the leg receiver/socket increases proportionately to leg length? Unless we're assuming the legs are so well braced as to permit no movement - which I guess is where the manufacturer will state that legs over xyz mm will need bracing; though even then most bracing schemes have a certain amount of play, especially if constructed using pressed scaffold swivel couplers.

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