A hub assembly for collapsible structures includes a first hub portion and a second hub portion. The first hub portion has a substantially U-shaped configuration and defines at least a first opening. The second hub portion has a substantially U-shaped configuration and defines at least a first pair of aligned openings. The first hub portion and the second hub portion are connected in a crossing-configuration, such that at least part of the second hub portion is received within the first pair of aligned openings of the first hub portion and at least part of the second hub portion is received within the first opening of the first hub portion.