When I went to add some ground buss to my RV ladder, when I drilled the small pilot hole in the bottom of each vertical side, nice RUSTY WATER came out!!
Shows they arent sealed too well, where the steps attach via screws to the vertical section. From each vertical section, I ran a braid bond to the frame of the 5'er. I run various vertical antennas off the ladder, i.e., Screwdriver, Hamsticks, etc. Oh yes, I did leave a small hole at the bottom of each vertical for a drain hole for any future water infustion.