This is just a quick storage rack I made when I outgrew my better kayak rack.
That one is gentle, but it doesn’t hold very many, and I don’t have a ton of space. The idea behind this one is holding kayaks as if they’re on a “stacker.”
It’s 4 feet long, 44 inches wide, and about 6.5 feet tall (but that’s arbitrary). I made it to fit 1 kayak per shelf on one side, and 2 on the other. Maybe in a couple of years I’ll be expanding it, but for now it holds what I need it to hold.
There’s nothing special about the construction. I just used normal 2x4s, screws, and some casters with poly rollerblade-style wheels. I stabilized with a big diagonal brace where possible, and simple plywood gussets where clearance was an issue. The padding is just a pool noodle cut in half and zip-tied to the top. I drilled some holes and used ropes in the same way that you’d use straps when loading onto a stacker.
It’s easy to get to the two outermost boats if you tie them down separately. I put the whole thing on wheels so I can move it out to get to the other side when needed.