NORSOK (Norsk Sokkels Konkurranseposisjon – Norwegian Shelf Competitive Position) is an industry standard developed by the Norwegian petroleum sector to ensure safety, cost-effectiveness, and interoperability on the Norwegian Continental Shelf.
: Recommendations for inspection, maintenance, and repair of offshore structures to ensure continued safe operation. norsok n003 pdf
The standard, titled "Actions and action effects" , establishes the core principles for determining characteristic loads (actions) and their effects on offshore structures. The standard is applicable to all types of
The standard is applicable to all types of offshore structures, including bottom-founded and floating structures, vessel hulls, mooring systems, and subsea facilities. It is organized into the following major sections: Permanent Actions Wave heights, periods, and slamming forces
Loads that vary during normal operation, including personnel, stored liquids, crane loads, and helicopter landings. Environmental Actions (E): External forces from the natural environment: Speed profiles and gust factors. Wave heights, periods, and slamming forces. Velocity profiles and drag forces. Accumulation loads and sea ice impacts. Accidental Actions (A):
Updated approaches for calculating extreme wave heights using the 100-year and 10,000-year return periods.