Formwork has to be designed, built, erected, supported, braced and kept up so that it carries every reasonably anticipated vertical and lateral load without failing; formwork meeting the non-mandatory appendix (ANSI A10.9-1983 Sections 6 and 7) is deemed compliant. Drawings or plans, with all revisions, for jack layout, formwork including shoring, working decks and scaffolds must be available at the jobsite. Shoring and reshoring equipment must be inspected before erection against the formwork drawings; damaged equipment too weak for the formwork duty may not be used. Erected shoring must be inspected immediately before, during and immediately after concrete placement, and shoring found damaged or weakened after erection must be reinforced at once. Sills must be sound, rigid and able to carry the maximum intended load; base plates, adjustment screws, shore heads and extension devices must bear firmly on foundation and form and be secured where needed; eccentric loads on shore heads are prohibited unless designed for. Tiered single post shores need a design by a qualified designer and inspection of the erected shoring by a structurally qualified engineer; the shores must be vertically aligned, spliced against misalignment, and braced in two perpendicular directions at the splice level, with each tier diagonally braced in the same directions. Single post shores may not be adjusted to raise formwork after concrete is placed. Reshoring must be erected as original forms and shores come out whenever the concrete must carry loads beyond its capacity. For vertical slip forms, jack rods or pipes must be specifically designed for the purpose and braced where not encased; forms must be designed so the structure does not distort excessively while being jacked; scaffolds or platforms are needed where employees work or pass; jacks must not be loaded beyond rated capacity; jacks need mechanical dogs or automatic holding devices if power or the lift mechanism fails; plumbness tolerances must be held; and the predetermined safe lift rate must not be exceeded. Rebar for walls, columns, piers and comparable vertical elements must be supported against overturning and collapse, and unrolled wire mesh must be kept from recoiling, for example by securing each roll end or turning the roll over. Forms and shores (apart from slip forms and slabs on grade) may be stripped only when the employer determines the concrete can carry its own weight and superimposed loads, based either on removal conditions in the plans and specifications having been met or on an appropriate ASTM compressive strength test showing sufficient strength. Reshores stay until the supported concrete has adequate strength for its weight and all loads on it.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.