Tent-like in appearance, mast supported structures typically have one or sometimes several peaks that are supported by either interior or perimeter masts. The fabric is attached to the interior mast by special connections, usually a bale ring or cable loop. Mast-supported structures can also be supported by adjacent buildings. The peaks of a mast supported structure are determined by the design and how the fabric is attached. Openings are typically ovoid or elliptical. The fabric that extends from the top of the opening is seamed and can necessitate patterning. Mast supported systems are suitable for long span roofs.