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[Dan Glass]

I was just wondering if anyone has had experience with the "Truss Pick" made by The Light Source.  I was looking at it for potential use with a double hung Pre-Rig in a semi permanent setup.  I can see that it doesn't give any support/lift to the lower half of the truss like a traditional Spanset would.  The reason I am looking at them is to add a few more feet to the raised "stored" height the truss can go.  Because I am using a Pre-Rig truss I cannot invert the spanset and put the point inside the truss and thus block the movement of the pars.  So I was just browsing the internet (avoiding Christmas shopping) and found the Truss Pick. I would love to hear your opinions and ideas.

[len woelfel]

Used them once, but not near what you're doing.  Truss I had was 12" with about 12 S4 and 4 small movers.  Total weight was less than half ton.  They were easy to work with.  I would check with your truss mfg. for further info on stressing the truss.

[Dan Glass]

Currently I have 17 sections of Pre-Rig hung in a straight line from 4 CM 1 ton motors.  Sorry I should have included that info in the original post.

[E. Lee Dickinson]

I consider it a had and fast rule that truss is wrapped so that every chord is supported. Spaneset is wrapped so that the weight tension pulls the wrap *in* like a noose. The idea is to keep the truss and it's welds under tension at the rigging point.

I really don't like the idea of hanging the entire truss from a few welds at the end.

Check with your truss manufacturer.

[Ron Hebbard]

E. Lee Dickinson wrote on Sun, 25 November 2007 15:36

I consider it a had and fast rule that truss is wrapped so that every chord is supported. Spaneset is wrapped so that the weight tension pulls the wrap *in* like a noose. The idea is to keep the truss and it's welds under tension at the rigging point. I really don't like the idea of hanging the entire truss from a few welds at the end. Check with your truss manufacturer.

Hi Lee;

Are you suggesting "welds under tension" or welds in compression?

Toodleoo!
Ron Hebbard

[E. Lee Dickinson]

Ron, you're right, I wrote that backwards. Wrapping the truss properly keeps the welds under compression.