This Caster Corner, for lack of a better term, was custom designed and built.
![p1](http://hstech.org/wp-content/uploads/2007/02/p1.jpg)
It is made of 1/4″ steel plate & angle iron. As you can see, it fits the 2×4 nicely. Countersink the holes and the platform lid sits flat..
![p2](http://hstech.org/wp-content/uploads/p2.jpg)
The holes in the angle plates are to screw into the bottom of the platform’s frame. A hole is drilled into the side to allow another platform to be bolted to this one.
![p3](http://hstech.org/wp-content/uploads/2007/02/p3.jpg)
Here it is in action. This particular frame is part of a tree base being built for Into the woods . The lid is being left off so a technician can be inside the tree to move it on & off stage. See the page “Trees”, Drilling holes in the sides of the metal holds these 2×6 pieces square.
![p4](http://hstech.org/wp-content/uploads/p4-1.jpg)