910.05.02.02 “Corrugated…

PCT Numéro

000-0139

commentaire ID

308

Commentant au nom de

VSL

État du commentaire

Commentaire

910.05.02.02
“Corrugated duct shall have at least 2 longitudinal flow channel ribs throughout the cross section. “
- This requirement is found only on one supplier in the industry and it is not required in any other standard/codes. Neither steel duct (corrugated) or smooth duct for external tendons doesn’t include any longitudinal channel ribs

“The plastic ducts shall meet the following requirements:
a) For ducts with an inside diameter of 50 mm or less, a 3 m length supported at the ends shall not deflect under its own weight by more than 75 mm at a temperature of not less than 20 °C.
b) …”

- We recommend to use Fib requirements FIBBUL 75 for qualification of the duct system, instead of a mixed requirement. The listed requirements a), b) c) seem to refer to FIBBUL 75, but not complete