All Commercial Slabs Not Created Equal

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Those in the business of concrete know the importance of a flat and level slab. Especially in industrial warehouse settings, where unmanned forklifts rule the floor and goods may be stacked on shelves 20 feet or higher, flatness and level specifications are a key indicator of project success.

But other businesses are catching on. Flatter and more level floors have been shown to be lower maintenance and provide an improved operational surface for many types of businesses. As a result, the demand for flatter floors is being seen in many different types of projects, from warehouses to retail store operations.

The degree of a slab’s flatness is expressed by two numbers, the FF (which describes the concrete slab’s flatness) and the FL (which refers to the slab’s levelness). Flatness is how close to geometric planarity a slab approaches. Flatness numbers run on a scale from 10 to 150, and most slabs fall into the range of 15 to 100. The higher the FF number, the flatter the slab.

Levelness is the amount of slope (or pitch or tilt) in a slab.  This is the degree to which the surface of the slab approaches true horizontal perfection. Read more