structural post

I'm trying to mount a solar panel rack with 2 panels using a 10' and 5' length of sched-40 2" galv iron pipe. It will be 2' in-ground (concrete), supported every 24" with strapping to one leg of wood tower and only the top 4.5' is unbraced... Is this kind of pipe OK for this? It seems sturdy...

I'm trying to figure out if I can remove these balusters/posts - see attached photo. These balusters are located between the kitchen and the dining room. My unit is the second floor of a townhouse, and the unit below had the same baluters in the same place. They were part of the original design...