These requirements are necessary for Kinetics spring lift slabs because the top of the structural floor becomes a pouring form for the bottom of the isolated slab.Conventionally this means locally a 10 foot straight edge would have 1/4 inch of variation, and globally the variation would be less than 3/16 inch. This means that locally the floor is considered “Flat” and globally the floor is considered “Good” (“Flat” and “Good” are terms defined by ACI- American Concrete Institute Guidelines Section 302). Kinetics requires a specified overall value of Floor Flatness FF = 38 and a minimum local value of Floor Flatness FF = 25.
