This Standard is applicable to uncoated cylindrical steel sheaths with a corrugated profile and with a nominal internal diameter of up to 130 mm and their connectors (couplers) which are assembled to form ducts for prestressing tendons in post-tensioned prestressed concrete elements. It applies only to sheaths and connectors made of interlocked or welded strip. The seals required between sheaths and couplers are not covered by this standard.
Rregullorja (BE) Nr. 305/2011 e Parlamentit Evropian dhe e Këshillit e datës 9 Mars 2011 që parashtron kushtet e harmonizuara për tregtimin e produkteve të ndërtimit dhe shfuqizimin e Direktivës së Këshillit KEE/89/106
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