A track assembly includes an upper track that includes an interface member having a first end and a second end, a plurality of wheel assemblies, an anchor, and one or more locking blocks disposed on a side of the interface member. Embodiments of the system include a lower track with a first side and a second side, wherein a flat portion is disposed near a top of each of the first side and the second side. In embodiments, flat portions may extend along a longitudinal axis associated with the lower track. A plurality of gaps may be disposed on the flat portions, and the gaps may be configured to receive a locking block and an anchor. The anchor may be configured to guide the upper track as the upper track travels along the longitudinal axis associated with the lower track.