How do I widen a dock ramp over a metal base?

Question

We have an older dock with only a 2 foot wide walkway to the main area of the dock. We call it “walking the plank”! It is dangerous for myself and our grandchildren. The problem is that the existing dock and ramp are metal so just adding some wider wood planks seems like a good idea but were not sure how to safely do this or if there is a better solution. We really need some good advise. So hometalk, what do you suggest?

Rachel's Trash~2~Treasures · Answer

Wider planks would do the trick, use treated wood and seal it really well. Drill holes through the existing 'plank' with corresponding holes in the new boards then bolt them down

Lifestyles Homes · Answer

Using Rachel’s concept,

You can cantilever the new wider pressure treated planks about 6” on each side, if you’re going to use 2x6 & about 8” for 2x8 pressure treated lumber.

You will have to let the lumber “air dry” in your garage for at least a month before coating it with a marine varnish. It doesn’t need the varnish, but it might help with splinters.

I would clean the heck out of the old planking and treat it with a good decking finish, as water will wick in between the two layers of planks and that will rot the old layer.

You will also need to use stainless steel lag bolts or carriage bolts which are actually giant screws. Not galvanized. The treated lumber will react negatively with galvanized.