Protect your existing outdoor ring with similar roof canopy. Any steel building can be built with no walls, partial walls or completely enclosed. Keep in mind, when installing any building without walls, uplift winds must be taken into consideration. This means that the foundation and the building itself must be designed to withstand higher uplift wind loads. This in turn, adds extra cost to the building. In fact, in some cases, putting up an outdoor ring canopy costs as much as buiding an indoor with covered walls.