The strut channel (Unistrut) is available at “good” hardware stores or industrial-supply stores. In Montreal, I like Quincaillerie Notre-Dame, a RONA affiliate that carries tons more products your average home center. The 3 mounting points use 6mm bolts and the length of channel is 63cm or 24¾ inches.
I have mounted an old Truck Luggage bag and a carrier for my usual trailer hitch arm. The striped duct tape is to help know where to stop loading the back so the gate will close properly!Read More »