A friend of mine is having a huge underground bunker style room put into his garden. It will be the length + width of his garden and will be buried under 2' of soil. It will be connected to his bungalow for access and will be used as a workshop for his various hobbies. It's costing him a small fortune but he's not concerned about that. The civil engineering firm will build the structure and top it of with soil but everything else he has to do himself. This is where I came in. He had concerns about getting natural light in over his workbenches and I recommended sunlight pipes. He had a look at them and liked what he saw. Now the problem is he doesn't want little clear domes over his lawn so he is raising the domes 8' and having long sunlight pipes. The company has assured him that the pipes will still work over the 11' distance. So after putting my foot in my mouth, my mate has told me that to hide the ugly silver ducting he want to encase them in old telegraph poles. To do so they need to be hollowed down the middle and these poles are all 10' long. I've told him that the easiest way would be to split them in half and channel out the waste then put the two halves together with the ducting in the middle. But he doesn't like the fact that spilt might be seeable and may cause concerns later on. He has told me that no matter the expense, he'll hire whatever equipment I need to hollow these poles out if there is another way to do it other than splitting it.
So my quandry is how do I hollow out 10 x 10' telegraph pole without splitting them down the middle. If there is no other feasible way then my friend is willing to see sense and relenquish the decision to me.
Sorry for the long windedness but I felt I should explain why I needed to know.
TR