Can't seem to be able to find the exact type flex needed between the pier and the ramp needed for flexibility. I know it has to be watertight, but can it be carflex. Looks like if you use flexible metal that the metal ground would eventually break into with all the up down motion of the water. Also, article 555(I think that's right) says it is not for private or non commercial use. Please refresh6 me on the article that does pertain to it. It's been a rough job bouncing on the the waves and my brain is sorta bouncing too. Thanks
