Abstract: Basic components for a snap-together structure include an elongated wall member with end caps, an elongated connecting member, an elongated corner member, an elongated end plate, and an aperture. Longitudinal locking channels are arranged on opposite sides of the wall member, and on orthogonal sides of the corner member. Each end cap for the wall member includes matching longitudinal locking channels, and a transverse end channel at its outer end extending between the longitudinal locking channels. The end plate includes a base portion and a connecting rib orthogonal thereto for being positioned in the locking channel of the other members. Each locking channel includes a pair of inner locking tabs arranged on opposite inner walls, and the connecting member includes two pairs of outer locking tabs on opposite side walls. The end plate is bolted to a foundation, and a plurality of wall members are stacked horizontally on top thereof.