Scott's Woodworking - presson
The shelves "float" on neoprene washers (cut from mousepads) that sit on top of copper washers, which are epoxied to the pipe along with sleeves below the washers.  This is to isolate the equipment somewhat from vibrations.

The shelves "float" on neoprene washers (cut from mousepads) that sit on top of copper washers, which are epoxied to the pipe along with sleeves below the washers. This is to isolate the equipment somewhat from vibrations.

stands