Abstract: Right rectangular parallelepiped construction modules including a system of latitudinal tangs and grooves and inner and outer shoulders which cooperate to interlock stacked or staggered construction modules. The construction modules can also include reliefs in their tops, sides and bottoms for receiving rebar supports, electrical lines, plumbing lines, or other means.

Abstract: A dispensing bin and cover cooperate to support many times the bin's capacity stacked on the cover. With the cover removed, empty bins nest for storage. Vertical stacking capacity is enhanced by surrounding the top opening of the bin with a reinforcement that maintains the horizontal shape of the top opening. A vertical component of the weight of identical bins stacked on top of the cover is opposed by a horizontal reaction force provided by the reinforcement and communicated to tapered sides. The dispensing aperture has a gate that automatically latches closed and permits sealing by conventional loop tag or tie. The cover has superior strength yet is light in weight so that handling of the cover is feasible by one man without machine assistance. Snap bails are held in place by intrinsic spring tension when stowed against bin sides or snapped onto the cover for retaining the cover to the bin. Snap bails are also used for lifting the full bin.

Abstract: A storage box, particularly adapted for seed storage and handling, having folded corners and sides tapered from bottom to top. The box is provided with a base member having slots engageable by the tines of a fork lift and a horizontal top stacking flange which extends outwardly to the same dimensions as the base member for vertical stacking of the boxes. The box is preferably constructed of steel plate and the folded corners assure the strength and integrity of the box.