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I like this look. How do you anchor the truss? Is it just sandbagged, or do you have a base or ropes that aren't visible?
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I use 2 different methods to stand the truss upright. The first is a simple flat baseplate. I have a pair made of diamond plate aluminum and 2X2 aluminum tube. I also have a pair of wooden baseplates made of 3/4" plywood and 3/4" plywood runners.
The flat baseplates are used when I stand up two sections (16' high total) of single hung truss. I bolt the baseplates to the truss and weigh them down with about 150 lbs of sandbags or stage weights.
I also have a pair of wooden boxes I built. I wanted to have different heights of truss standing up, and a single 8' section didn't seem tall enough for me, so I built 3' high boxes. These boxes are made of 3/4" plywood and 2X4 bracing, and have an open back so you can reach in an get to the bolts. In use, I stack about 75 lbs of sandbags or stage weights in the box for stability. I only use a single 8' high section with a box base.
I have only used the truss standing up on sturdy stages at corporate type shows. I have not had a problem of the truss swaying or being indanger of falling or bumped into. I will only stack two section max on a baseplate and one section on a box.
Craig