This is my idea for a roof attachment for my new kayak… I’m seeking feedback before building it.
The artwork is crude, but hopefully it conveys the overall idea. The four central fore-aft boards (2×4) sandwich down over the factory roof rails (’05 Subaru Outback, shown in black) with a rubber strip between them using eight hex head bolts. The entire assembly can be removed by removing these bolts.
The lateral crossbars support the load of the kayak and are bolted to the top two fore-aft rails that hold the assembly to the roofrack.
Two more (longer) fore-aft supports run 6 or 8 feet along the length of the car and support numerous tie-downs illustrated near the front of the rack. These would be held in place on the port side by passing them through a hole drilled in the 2×4 and tying a simple knot (not shown). The starboard side would have cam buckles for each strap so that each one can be custom fit to make equal contact with the boat.
This would, I hope, create a hammock that would cradle the boat, while evenly distributing its weight over a large surface area, reducing the likelihood of oil canning. I suspect that the entire cost of the assembly would be around $30 and be superior in performance to more expensive saddle systems which often dent the bottom of the boat. The design only needs to be able to support the weight of the boat since the ripping forces of the wind are supported by the heavier duty straps going over the top of the boat.
Any opinions? Suggestions? Warnings?