Thanks for the response. The run is made of 3/4" electrical pvc pipe. Electrical is cheaper than plumbing pvc and is also sunlight resistant. The 4-way fittings are available at home depot/lowes, all other special fittings you can get online - google - pvc furniture fittings. I opted to make some fittings out of standard fittings by drilling and gluing.
The run is 15x15x8. Two roosts were added after we completed it. The idea was to be able to unattatch the coop and spin every thing around to opposite end of our external 50x25 run. After paying $90.00 for 3 rolls of chicken wire, which works fine., I found a roll of poultry netting on line (100x12) for $84.00. The netting would have been much lighter, which in turn would make the run easier to move. It shouldn't be a problem to move with 2 or 3 people. The run is attacted to the coop with plastic cable tie wraps. If any one is interested I would be happy to share the measurements for cutting the pipe.
Thanks< Steve & Fran