Abstract: The modular building structure has reinforced column and wall panel components to form walls of a building. A foundation of concrete may have rods embedded according to a building floor plan. Concrete blocks with hollow cores may be stacked at specified column locations with at least one rod bracket device positioned in a joint and at least one rod extending upwardly through the hollow core. An attachment rod may be inserted in at least one channel of each rod bracket device. A wall panel may be positioned on the foundation to span the space between adjacent columns. Each wall panel may have at least one embedded rod extending through a lower horizontal member to be attached with a fastener. A wall holding bracket may also engage an outside stud member of adjacent wall panels at each column with the wall holding bracket attached to the rod bracket device.

Abstract: The table serving tray may be a pair of tray elements that are interlocked together at an adjoining wall portion of a wall that is attached to a base. The adjoining wall portion of each tray may have an approximately semicircular cross section lip interlocking element on a portion of an upper edge of the adjoining wall portion. Each adjoining wall portion may have a centrally disposed channel that form a hole when the pair of tray elements are interlocked to place the tray on a table and around an upstanding projection thereof.

Abstract: A combined can stacker and spatial media advertising/instructional device facilitating the vertical stacking of similar plan-view shape cans two-at-a-time while also providing space on the panel side(s) of the device for either advertising or for instructions, such as, for example, securing two binary chemical cans together and providing instructions as to the proper mixing of said binary chemicals. For specific example, to provide instructions as to mixing car body compound contained in one first can with hardener contained in the second can, where the two cans are secured to each other with the device to form one vertically integral physical unit.