A platform element that is connectable to a secondary structure using a clip that is adapted to be installed in a storage position or a use position with respect to the platform element. The platform element includes a substantially planar panel and at least one upstanding wall that extends generally downward from the panel and is adapted to space the panel from an external support surface. The clip is adapted to connect the upstanding wall to the secondary structure when the clip is in the use position. A receptacle is formed on an underside of the panel. The receptacle is adapted to engage the clip to maintain the clip in a fixed position with respect to the panel when the clip is in the storage position.