A support structure of the present disclosure provides a stable and expansible material storage system or work platform. The support platform includes a plurality of apertures, typically sized and configured to receive standard grade lumber sizes. The support platform may be used singly for storing materials or for working on the materials or two or more additional support structures can be combined to support multiple work pieces in a tiered and/or side-by-side arrangement, or to create a stable workstation. The material support capability of support structure is also expansible both horizontally and vertically, and for ease of storage, multiple support structures are nestable or may be individually collapsible.