Abstract: An improved breather system for a sealed storage structure. The roof of the storage structure is provided with an opening and a generally cylindrical, vertically disposed, breather bag is located within the structure with the neck of the bag being sealed within the opening. A cable is attached to the inner surface of the bag at the lower end of the bag and extends upwardly through a series of vertically spaced tubular guides and exits through the neck of the bag to the exterior. Each of the tubular guides is connected to the inner surface of the bag by a series of cables. A storage sleeve can be mounted on the roof in communication with the opening. By pulling upwardly on the cable, the bag will be drawn upwardly out of the storage structure and into the storage sleeve to a location where the bag will not interfere with filling of the storage structure with a stored material.

Abstract: A method and apparatus for leveling a storage structure. A plurality of pairs of anchor bolts project upwardly from the footing of the structure and each pair is positioned in radially spaced relation. A support bar is connected to the threaded upper ends of each respective pair of bolts, and through threaded adjustment, the bars can be leveled in a radial direction, as well as leveled so that all of the bars lie in the same horizontal plane. Foundation angles are bolted to the support bars and carry a series of foundation sheets which comprise the lowermost tier of the storage structure. The bolts connecting the foundation angles to the support bars extend through slots in the lower flange of the angle, as well as slots in the bar to provide an adjustment for the foundation angle in a circumferential, as well as radial direction. By proper adjustment of the bolted connections, the foundation sheets can be properly leveled to insure the plumb condition of the storage structure.