What is FF level?
Ff, or “flatness F-Number,” defines the maximum floor curvature allowed over 24″ (600 mm) computed on the basis of successive 12″ (300 mm) elevation differentials. Fl, or “levelness F-Number,” defines the relative conformity of the floor surface to a horizontal plane as measured over a 10′ (3.03m) distance.
How is FF measured?
FF and FL are measured using either the Dipstick from Face Construction Technologies or the F-meter from Allen Face & Company. The Dipstick was the original device used to measure these values and is stepped across the floor. The F-meter rolls along a defined line.
What does FF 35 mean?
FF 35/ FL 25 – flat. FF 45/ FL 35 – very flat. FF 60/ FL 40 – super flat.
What does FF mean in concrete?
Floor Flatness
Floor Flatness (FF): The FF number essentially tells you how flat your concrete floor is. Bumps and grooves cause your Floor Flatness numbers to drop. Higher F-numbers equal flatter floors. Floor Levelness (FL): The FL number indicates if you have any tilts or pitches in the slab.
What is the maximum level in FF?
The maximum level is 50. In Final Fantasy Origins and later versions, the level cap is 99. The amount of experience required to level up is also capped, at 29,000. Characters’ levels were originally meant to determine the success rate of fleeing from battles, but in the NES version this is glitched.
What is super flat floor?
Superflat is a generic term given to a high tolerance floor for VNA applications. A Defined Traffic path occurs when material handling equipment moves up and down the floor in precisely the same wheel position each time.
How flat should a concrete slab be?
Classifying Concrete Floors Based on Flatness and Levelness
| CLASSIFICATION | SPECIFIED OVERALL FLATNESS (SOFF) | SPECIFIED OVERALL LEVELNESS (SOFL) |
|---|---|---|
| Moderately Flat | 25 | 20 |
| Flat | 35 | 25 |
| Very Flat | 45 | 35 |
| Super Flat | 60 | 40 |
How do I know if my concrete slab is level?
How to Determine If a Floor Is Level
- Lay a 4- to 6-foot beam level on your floor.
- Measure any gap that appears between the floor and the level.
- Mark any areas of the floor that are higher than 1/8 inch along the floor.
- Slowly slide the level over the floor to check each area of the subfloor.
What is FF and FL in concrete?
Floor Flatness (FF): The FF number essentially tells you how flat your concrete floor is. Bumps and grooves cause your Floor Flatness numbers to drop. Higher F-numbers equal flatter floors. Floor Levelness (FL): The FL number indicates if you have any tilts or pitches in the slab.
What is FMIN concrete?
The most practical way to measure a defined traffic floor is by making continuous Profileograph measurements of each path. Such direct measurement will usually involve point separations other than 300mm or 3000mm….Transverse Graphs F min.
| Classification | F-min number |
|---|---|
| Good | 38 |
| Flat | 50 |
| Very flat | 75 |
| Superflat | 100 |
What is an FF f number for a concrete slab?
F F numbers can be taken for slabs on grade as well as elevated slabs. Floor Flatness tends to be very important for spaces where equipment must be set perfectly level — spaces like TV studios, warehouses that use air-pallet jacks, and some research laboratories require floors that are flatter than a typical concrete slab.
What does FFFF fl mean in construction?
FF/FL numbers Floor flatness (F F) controls the bumpiness of the floor surface and is primarily affected by the finishing operations after screeding, including restraightening and power floating. Essentially, F F numbers evaluate the elevation differences along a sample line at one-foot intervals.
What does FF mean in floor measurement?
Essentially, FF numbers evaluate the elevation differences along a sample line at 1-foot intervals. F numbers extend from zero to infinity so the higher the F number, the flatter the floor. Floor levelness (FL) controls the departure of the floor surface from the specified slope or plane of the surface.
What is floor flatness (FF F)?
F F numbers depict the Floor Flatness, or how close to planar the floor is. In other words, Floor Flatness is a statistical measurement of how wavy or bumpy a concrete floor is and takes into account the amplitude (height if the waves) and the wavelength (horizontal distance between waves).