When your stacker speed limits your mill’s production capacity, a secondary elevator can be an appealing solution. This very simple machine makes it possible to continue stacking lumber while your stacker's (primary) elevator descends with a full bundle, then waits until the bundle is released from the forks before going back up. Using a simple control system, the secondary elevator can transfer bundles that are already under way to the primary elevator. This boosts productivity considerably as the waiting time between bundles becomes a matter of seconds rather than minutes. You can choose between an electric motor or hydraulic actuator to drive your secondary elevator.