The KayaArm can be installed on a metal dock. Attached are a few examples of how:
To mount KayaArm onto any metal dock all that is needed is to first bolt a short piece (at least 2 ft. long) of 2″x8″ (or 2”x6”) onto the side metal beam of the dock. Attach the 2×8 such that its top edge is flush with the top of the dock (or a little above the dock). Then mount KayaArm onto the 2×8 with deck screws just as you would to a wood dock as described in the assembly/mounting instructions. The attached photo, sent by a happy customer, is a good example of how to do it.
The photo below shows installation of 2 KayaArms to a metal dock. Extra holes were drilled in the mast at the height of the lower metal stringer (below the webbing) to secure the KayaArm to both the upper and lower metal stringers.
The photo below shows installation of 1 KayaArm to a metal dock. A 2×6 was thru-bolted to the upper stringer of the dock. Ideally, there should be another 2×6 secured to the bottom metal stringer as well (you will need to drill extra holes in the mast at the appropriate height), or at a minimum, with U-Clamps to the metal webbing of the dock. Mounting to 2×6 boards facilitates easy removal of the KayaArms in winter.
The following installation is from a customer who thru-bolted through the metal stringer, as well as using U-bolts to secure the rot-resistant board to the metal webbing of the dock. This makes for a more secure installation.