San-Con builds concrete stacking tubes via the jump form method.  Stacking Tubes (sometimes called Lowering wells), store bulk material in an external conical pile.  Often these tubes double as conveyor supports.  San-Con's system for stacking tubes is a miniature version of the silo system.  It setups up fast, provides a safe work platform, and is self contained. Aggregates and coal are the primary use for stacking tubes