Patent ID: 6904728

Claim:
A wall comprising: a plurality of wall members stacked substantially vertically and including a bottom wall member and a top wall member, each of said wall members including an upper surface in opposed relation to a lower surface and a through opening extending from the upper surface to the lower surface, wherein a through opening in each wall member is aligned with a through opening in all other wall members so as to form a through opening in the wall extending from the upper surface of the top wall member to the lower surface of the bottom wall member; a rod positioned in the through opening of the wall and having an upper end in opposed relation to a lower end, the rod extending along a first axis; a lower fastener attached to the lower end of the rod and attached to the bottom wall member, the lower fastener comprising a locking nut, the locking nut including an internally threaded portion for receiving a threaded portion of the lower end of the rod, the threaded portion of the locking nut extending substantially along the first axis, and the locking nut including an unthreaded portion approximately one half inch (1.25 cm) long below the first threaded portion, the threaded portion and unthreaded portion of the locking nut extending substantially along the first axis, and a flange extending transversely to the first axis for supporting the threaded portion wherein the flange of the locking nut includes a fastening means attaching the flange to the lower surface of the bottom wall member to secure the lower fastener to the bottom wall member and wherein the threaded portion of the locking nut comprises a tapered surface opening at an end of the threaded portion for receiving the rod to facilitate attachment of the rod to the lower fastener; an upper fastener attached to the upper end of the rod adjacent the upper surface of the top wall member; an actuator positioned between the upper fastener and the upper surface of the top wall member for applying a downward force to the top wall member, the actuator comprising a spring; a spring support plate attached to the upper surface of the top wall member, the spring support plate having an opening for the rod to pass therethrough and the spring support plate having at least one hole for at least one spring support plate fastener, and at least one the spring support plate fastener passing through a hole in the spring support plate thereby attaching the spring support plate to the top wall member.