Thanks Jerry. I like the spirit of cooperation we have on this stuff. By the way, I think that the wall you labeled as the west wall is actually the east wall. For what it is worth, I measured the hardwood floor boards in our house and they are 3-1/4 wide. Also, the pipes appear to me to be electrical conduit. I looked up the standard dimensions for 1-1/2 rigid steel conduit. The outside diameter is 1.9.
Charles, it's no good measuring the floorboards in your house, the flooring in the TSBD is industrial, not domestic. Also, those pipes are
definitely not conduit. I really don't understand why you guys are still struggling with this. You have the best standard measurement possible in the photo. As I posted earlier, 3no vertical courses of bricks plus cement bed is between 8''-8.5''. Now all you need to do is measure the 3no courses on your monitors with a small compass set and all the other measurements, floorboards, pipes etc, all fall into place. I've not done it myself but I'd be very surprised if the flooring isn't
approx 6'' and the pipes 4''.
PS If you try this don't forget the first course of bricks is only half visible. Measure the three above. Good luck.