Shop for Building Materials at The Home Depot. Redibase is an 8 in. x 24 in. disposable, recycled plastic form for applying a base (footing) to a construction Tube formed, (on sight poured) in-ground, concrete column. Suitable for decks, porches, gazebos and light exterior structures, Redibase equipped column foundations have greatly increased load bearing capacity, will resist tilting, sinking and in Northern areas, eliminate frost heave. Designed for use with the one pour, one piece (column and footing) same day system, Redibase attaches to tubes with duct or filament tape in 2-minutes, no tools or lumber required. Simply push Redibase down over tube, slide unit down to bottom and apply 3-4 passes of ductape. One size Redibase fits 8 in., 10 in., 12 in. diameter tubes, forms a solid one piece casting and conforms to National codes. (IBC- BOCA- CBC). In use, Redibase’s strong flexible domed shape and tough taped joint require no special excavation bottom leveling or leveling material. There are no rings to fit or cut off and the unit’s soft sidewalls can deflect around any excavation obstructions. Redibase is economical, tight stacking, compact and lightweight. Easy to transport, Redibase requires only 2 cu. ft. of concrete to fill.