requirements

The friction requirements in line with construction contracts are set in the standards ZTV Asphalt-StB 07, ZTV Beton-StB 07 und ZTV BEA-STB 09.

 

requirements (final inspection) - construction class SV and I to VI:

measuring speed critical value

critical value + tolerance

80 km/h 0,46 µ-SKM 0,43 µ-SKM
60 km/h 0,51 µ-SKM 0,48 µ-SKM

40 km/h

0,56 µ-SKM 0,53 µ-SKM

Critical values apply to a single value of a 100 m section. A tolerance of 0,03 µ-SKM is added.

 

requirements (warranty):

measuring speed critical value    
80 km/h 0,40 µ-SKM    
60 km/h 0,45 µ-SKM    

40 km/h

0,49 µ-SKM    

A shortfall during warranty measurements does not prove a defect. The emplyer has to verify a defect and attest whether the contractor is responsible.


These values do not apply for local and service roads, bicyle and foot paths, as well as municipal parking areas.

 

 

For older roads there are requirements set in the M BGriff, edition 2003. If the measuring values fall below the following requirements, friction improving measures have to be checked.

measuring speed critical value
80 km/h 0,32 µ-SKM
60 km/h 0,37 µ-SKM

40 km/h

0,42 µ-SKM
SKM-MG_0334.jpg

Kalender

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