High Lift Door Projects High Lift Doors for a Container Depot China Project reference: High Lift Doors for a Container Depot by ABX Sectional Overhead Door. Customer Challenge A container depot required doors clearing double-stack container handling at the dock line. Our Solution We supplied high lift sectional doors with 4.5 m low headroom lift clearance and heavy duty springs. Results Double-stack reach stackers pass through with full margin and spring life exceeds projections.