Abstract: A modular storage bin utilizes bin extension sections that are attachable directly to a standard lower cone section to provide increased storage volume that may be selected to accommodate needed volume increases and height and space restrictions. The bin extension may be selected from one of a box bin section or a cone bin section or a composite bin section. Multiple box bin sections with or without a cone bin section may be utilized. In addition, the box bin sections, the cone bin sections, and the composite bin sections may be made with side walls of varying heights. The supporting framework is operatively attached to the standard lower cone section and thus remains the same for all modular bin variations. This supporting framework utilize four vertical support columns each of which includes a bearing pad for supporting a load cell and a bin support surface. A discharge gate section attached to the bottom of the standard lower cone section includes a vibrator directly attached to one gate section side wall.