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The recommended value of Ya (termed Yr) given in EN 1537 is 1.35, which contradicts Eurocode 7. Since the latter takes precedence, Ya = 1.1 or 1.0 should be applied instead, according to the Design Approach adopted.

The UK National Annex to EN 1997-1 confirms Ya = 1.1 for anchorage design in the UK, but also states that 'larger values ... should be used for non-prestressed anchorages to make their designs consistent with those of tension piles ... or retaining structures.'

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