Here's what I came up with for a dry dock for my 14. It's made of 2 - 2x6x8 (side rails), 2 - 2x6x10 (front & rear cross pieces), 2 - 2x4x10 (screwed to top edge of cross pieces for stiffening/extra surface for carpet), 2 - 3" Sched 40 pipe (for legs), 2 - 2" Sched 40 pipe + ~2' extra that I had (for diagonal bracing), 4 - 3" x 2" T's (legs to diagonals), 4 - 3" caps (for leg bottoms), 2 - 2" couplings (for added length of diagonals), 4 - 3/8x6 galv hex bolts w/washers & nuts (to fix legs to side rails), and 4 pieces of i/o carpeting which I got for $3 at a carpet shop. I made it for quick assembly/disassembly so I used only 1 bolt thru each leg into side rails and lashed the corners to stiffen it up. Also pulled diagonals into T's under the rig with lashing. Will add a 2x10x8 along center line from front to back to walk on while pulling the boat onto dry dock. Now I'm just hopping over the frame while I pull it up. It's sitting in about 1' of water at the shore side and 2' at the lake side. I made the legs extra long so that I can adjust the frame up in the spring when the water is 12 - 18" higher. I'll put extra holes up each leg at 2 to 3" intervals when I get back to my drill press in the fall. The front and back cross pieces are notched into the side rails so that 1 1/2" of the front and back cross pieces remains above the side rails - this is where the 2x4s are attached.