SQUARE FOOT Model SF32 Plastic Footing Form 32 in. x 22 in. x 32 in., is a engineered pre-fabricated plastic footing form, rigorously tested meeting all building code requirements, used in conjunction with either a 12 in., 14 in., 16 in. or 18 in. Dia construction tube, which jointly provides for no cold joints, ribs in the footing for structural integrity, air vent holes - no pockets, providing for the safety, strength and stability for your project. Excavation and placement of the footing and forming tube, backfilling and concrete pour can happen in just a few hours. 4 parallel footing sidewalls and structural points of contact to the base, also easily facilitates the use of rebar without custom fabrication delivers easy leveling and offers future expansion of a deck (as an example) to a sunroom or future home addition. In areas with frost, a 6 in. minimum footing thickness produces a thicker footing which decreases uplift and lateral movement caused by frost heave and high velocity winds. The SF32 uses 7 cu. ft. of concrete, equivalent to 10.5 lb. to 80 lb. bags easily found in the same concrete department.