Parallelogram articulated lattice mast for passive (self) deployment

A self-deployable mast, typically for supporting a payload. The mast has top longerons, bottom longerons, and hinge linkages that form a series of moveable parallelograms operable to fold and unfold. The mast further has springs and truss diagonals, with at least one spring and one truss diagonal associated with each of the parallelograms. The springs are operable to deploy the mast from a folded position to a deployed position. Each truss diagonal is operable to become in tension diagonally across its associated parallelogram once the mast is deployed into a final position. In other embodiments, motors may be used instead of springs.