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L stands for the length of the span that you are evaluating in whatever unit of measure you are using.
Tile wall deflection. In practical terms this means in a residential application with joists 16 o c. Cracked tiles may have been caused by settlement cracks in the wall structure vibration or impact damage. The l 360 standard means that the floor should not deflect more than the span divided by 360. Cracks can be filled but may not be completely invisible if there is any noticeable deflection in the face of the affected tiles.
Answer the standards for a porcelain tile is that the substrate can not have more deflection than l 360. The batten should run the full length of the wall and be positioned with the top edge one tile width plus one grout joint width above the floor or work surface. If the span of the joists is 10 feet between supports then the deflection should not be more than 1 3 between the center and the. In actual practice what this means to the installer is that they have to know if the sub floor will be able to support the tile and not exceed the deflection criterion of l 360.
400 mm the maximum deflection that can be allowed when using l 360 is 16 360 which equals 1 25 04 or 1 mm. For natural stone over a wood subfloor it is l 720. Traditionally the accepted minimum requirement for floor rigidity is l 360 before the tile underlayment is installed. Fix your straight length of timber batten to the wall you are going to tile.
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Fix your straight length of timber batten to the wall you are going to tile. Traditionally the accepted minimum requirement for floor rigidity is l 360 before the tile underlayment is installed. For natural stone over a wood subfloor it is l 720.