Structural Slab Level And Finished Floor Level

Ssl structural slab level is typically more used within the industrial and commercial markets and is very simply the level of which the structural concrete floor slab would finish however the term ssl is only use if there was to be other finishes to be placed over the structural slab.

Structural slab level and finished floor level.

Sfl refers to the level at the top surface of the floor screeding or concrete. Finished floor level designing buildings wiki share your construction industry knowledge. Correct me if iam wrong ffl refers to the level at the top surface of floor finish. Polyurethane foam is injected through holes where it expands and raises the slab.

Per say the floor finish level is 50 mm generally above the concrete mother slab level. In coastal areas wave action causes even more damage often destroying enclosed building areas below the flood level and any building areas above the flood level that depend on the lower area for structural support. Foam is injected until the floor is level reaching 90 rigidity within 30 minutes. It spreads across uneven slabs filling in low spots as it creates a new level surface.

We know the steel will deflect under the weight of the wet concrete and because the slabs are often ul rated the design slab thickness is a minimum thickness to achieve the necessary fire resistance. To ensure this minimum thickness is achieved the steel beams are undercambered intentionally. Very small sections of existing finished flooring are removed to access slab. Above the flood level these buildings and their contents will be damaged or destroyed.

So in concrete construction it may be the uppermost surface of a screeded finish or in timber construction ffl will denote the top level of. If you plan on leveling a concrete floor you can do so with relative ease by using a leveling compound. Ffl finished floor level. This is where all the building element finish levels are referenced from.

Finished floor level ffl refers to the uppermost surface of a floor once construction has been completed but before any finishes have been applied. In other words floor flatness is a statistical. Is it the finish floor level ffl or the structural finish level sfl or the structural slab level ssl. In the case of an elevated slab that has camber the f l the structural slab must placed first deflecting to its final shape followed by a topping finish slab that gets measured for floor levelness.

Floor flatness f f f f numbers depict the floor flatness or how close to planar the floor is. The ultimate goal is a flat level slab.