Then, you will need to install a series of floor joists across the entire length of the support beams; these will need to be the same length as the distance between the two rim joints so that they’ll fit between them. In the example design, the floor joists are all separated by 14.5-inch gaps except for the outermost two, which are 13 3⁄4 inches (34.9 cm) from their immediate neighbors; this is to allow a standard piece of plywood to line up with the outermost edge of the outermost joist but only cover half of an interior joist, allowing its neighbor to cover the other half so that both can be supported properly.
I think that we had to purchase some additional hangers that were built especially for bike tires. This system worked pretty well, one comment that I have is that they don't hold up to the weight of several combined bikes as well as I would like. You need to make sure that the track is anchored very often, as having hooks in between anchor points starts to flex the main rail and can result in the hooks popping off.