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den minimumsværdi, der beregnes af formlerne for pladetykkelsen, kan fraviges i nedadgående retning, når den tilladelige værdi er bestemt ved styrkeberegning på skroget og beregningsresultatet er attesteret som tilfredsstillende.
plate thickness may be less than the minimum value produced by the formulae where the permissible value has been determined and certified on the basis of calculated evidence of sufficient hull strength.
tegninger og planer (styrkeberegning, stabilitetsberegning osv.) kontrolleres af følgende instanser: staatstoezicht op de mijnen, dienst voor het stoomwezen og directie noordzee van rijkswaterstaat. waterstaat.
all plans (strength and stability calculations, etc.) are checked by the state mines inspectorate, the boiler inspection service and the north sea directorate at the rijkswaterstaat (department of water control and public workd).
