A space saving conveyor to elevate or lower containers while being conveyed in a mass condition. The spiral mass conveyor can be used as transportation or as an accumulation system. The spiral conveyor is available in 12” to 36” wide chains. The CHSC design utilizes a powered center drum to assist in elevating the chain that is driven with a standard conveyor drive. The powered center drum allows standard commercial plastic chain and wear strips as part of the design. This allows economical spare parts to be used.