A registered professional engineer experienced in lift-slab construction must design and plan lift-slab operations; the employer must implement those plans, which include detailed erection instructions and sketches and provisions for lateral stability of the structure during construction. Jacks and lifting units must be marked with their manufacturer-rated capacity and never loaded beyond it, and must be designed and installed so they will not lift, or keep lifting, when overloaded. Jacking equipment, meaning any load-bearing component used in the lift (for example threaded rods, lifting nuts and attachments, T-caps, hook-up collars, shearheads, footings and columns), must support at least 2 1/2 times the load being lifted and must not be overloaded. Each jack needs a safety device that holds the load in any position if the unit malfunctions or loses lifting ability. Jacking must be synchronized so the slab rises evenly, with every support point kept within 1/2 inch of level. Automatic leveling requires a device that stops the lift when the 1/2-inch tolerance is exceeded or the jacking system malfunctions; manual leveling requires centrally located controls attended by a competent person experienced in the lifting operation and equipment. No more manually controlled jacks than the operator can keep within tolerance may be used on one slab, and never more than 14. Only employees essential to jacking may be in the building or structure during a jacking operation, unless a second registered professional engineer, independent of the one who designed the lift, has determined from the plans that losing support at any single jack would stay local and the structure would remain stable. Non-essential employees may never be directly beneath a slab being lifted. A jacking operation runs from the start of lifting until the slabs are secured by temporary or permanent connections. Following the non-mandatory appendix (continuous bottom steel through column head areas) is deemed compliance with paragraph (k)(1) to (k)(3). Wedges in temporary connections must be tack welded or otherwise secured, and no lifting rod at a column may be released before that column's wedges are secured. Welding on temporary and permanent connections must be done by a certified welder who knows the welding requirements in the plans and specifications, and load transfer to columns must wait until shear plate welds cool to air temperature. Jacks must be positively secured to columns, and lifting rods must be prevented from slipping out of position by design or by locking or blocking devices.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.