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Three and four loop dampers of one piece construction (Figure 3 and Figure 4) and even a Bate damper mounted around a mid span joint (Figure 5) where fatigue failures had occurred.

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Modified BATE Damper | BATE Damper at Strain Clamp

Figure 3 | Figure 4


BATE Damper around Mid Span Joint

Figure 5 and photo

For very long spans, such as in river and fiord crossings extra lengths are added as in Figure 6.

Festoon
Figure 6

These are known as FESTOONS and some long spans have been built with as many as ten festoons reaching out 50 metres into the span.

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