actually i built one this morning.
here is a link to the concept, but i altered it a little
http://www.wakeskating.com/forum/viewtopic.php?t=14031 if you look at my pics, i made 2 8 foot rails because it makes it easier to transport. i have 1 2x6 laying flat and then 1 2x4 screwed onto each side of it screwed in vertically. then 2 pieces of trex on the top and screwed down.
the pipe is then screwed into the plate you can see in the second image. and to connect the 2 rail sections together, im going to put another 2X6 in between the two sections and screw them into place. to put it in the ground, you screw all of your support poles into the base plates, then place the rail in the water, start hammering one side in and work your way from one side to the other so it all goes in equal. and level.
where im going to be putting this in there is a tide so i have to pull the rail out at least once during the day and move it out further into the water, to move it, i plan to unscrew all the poles from the plates with vice grips, then remove the rail from the top so i have just the poles sticking out of the water. then using the vice grips, grip onto it and twist and pull up at the same time.
the link i posted has ALOT of information throughout that thread. i just made what i screw my trex onto a little differently, it will make it stronger, and this way i can connect as many sections as i want together.
you can buy everything at home depot, although we bought the wood and trex from our local lumber yard due to the price being cheaper. but we bought the poles and the base plates(no idea what they are called, sorry!) from home depot. the poles came in 10 foot lenghths are 1 inch in diamter, they where $20 each, and i cut them in half so i have 4 5 foot sections. which is all i need for my spot. we bought 4 of the plates they screw into ($7 each), but odds are i am only going to have 3 vertical supports for the 16 foot rail i built.
if you have any questions, feel free to ask. ill try my best to answer
(Message edited by lfrider92 on December 21, 2009)