Good planning is essential for all successful construction, but it is especially critical in tilt-up work if the many potential economies of the technique are to be realized. SMOOTH CASTING SURFACE IS NEEDED The concrete floor slab of the building is usually the place chosen for efficient casting of tilt-up panels. Its surface must be level and smoothly troweled. The base slab requires good subgrade support and adequate strength and thickness to carry the heavy mobile cranes that set the panels. FORMWORK The utter simplicity of the forms is a major advantage of tilt-up construction. Only edge forms and frames to form windows, doors, and other openings are needed. Chamfer strips, rustication formers, or patterned form liner material are installed at this stage when required. REINFORCEMENT AND INSERTS Reinforcement is set on stainless steel, galvanized, or plastic-coated bar supports, usually at mid-depth of the panel. Several proprietary designs of inserts are available for attaching the lifting cables and temporary braces essential to the tilt-up method. CONCRETE PLACEMENT AND CURING Concrete placement is similar to work done on a floor slab, with added precautions for special aggregates or patterned surfaces. Curing is started as soon after finishing as possible without marring the surface. RIGGING AND TILTING Load-carrying ability of the lifting inserts depends on the strength of the surrounding concrete, so tilting up should not begin until the concrete has reached design strength. Erection methods depend on whether the crane can operate on the floor slab or must stay outside of the building and whether panels are cast face down or face up. BRACING THE PANELS Because a tilt-up panel is not a completed wall immediately after lifting, temporary braces are needed to resist wind and other lateral forces.