There's a auger type screw on the ends of the galvanized pipe. I just twisted them a few times after I pounded them down. Haven't had any issues. I was concerned about using 2 of the 4x10 walkways hinged in the middle. It's actually worked very well. No problems with getting pinched etc.. I've got two more pipes I'm going to sink down off of the main platform. I just don't think my 8' pipes will work. I need to get some 10' pipes. At high water, the dock would float right off the top of the pipe.
Why don't you put some inside couplings on the pipes and put on some 2 foot extensions?
