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  1. calc_80

    EN 1991-1-4. Probability Factor (Cprob), 1 Year Return Period

    NOTE 2, says that minimum wind velocity during installation is 20m/s (Is this min. speed also suject to reduction?). If for example the duration of installation is less than 3 Months (but higher than 3 days) - 5 years return period, to reduce those 20m/s with Cprob(5 years)? Thank you very...
  2. calc_80

    EN 1991-1-4. Probability Factor (Cprob), 1 Year Return Period

    Thanks for your feedback. I have another question now. Can I reduce the 20 m/s as well (the recommended basic value) with the 2 Years probability period? Thank you!
  3. calc_80

    EN 1991-1-4. Probability Factor (Cprob), 1 Year Return Period

    Dear comunity, I have to ballast plate laying on a flat roof. The plate has to stay there for less than 6 months. Unfortunately, with 2Years of probability period I get too much ballast required. Have you calculated that with 1 year probability. How you calculate it actually Cprob for 1 Year...
  4. calc_80

    Cable Trays - Ballasting against Wind Load - Eurocode

    Dear All, We have to design cable trays with covers on flat roof according to Eurocode. Understanding that a closed cable tray with cover is acting like a plane wing we are not sure how to implement correctly the norm. We have to calculate it as per 1991-1-4 and we have different approaches...

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