Surfacing Materials: Chicago Metallic SpanAir™ Ceiling SystemsFill in those wide, spanning spaces with SpanAir™. These highly sustainable, metal ceilings use high-content, recycled aluminum or steel and include SpanAir™ Plank Ceiling Systems, available in custom or standard versions in 12-in. or 24-in. widths and 8-ft. length; SpanAir Clip-in Ceiling Panels, in 15/16-in. T-bar suspension components and various sizes; and SpanAir Torsion Spring Ceiling Panels, with an EZ-Spring feature and various sizes.