 Though their total travel is minuscule, their ability to absorb forces created by chain deflection prevents damage to both tower and chain.The bridge has three independent wrought iron chains per side, from which the bridge deck is suspended by eighty-one matching vertical wrought-iron rods ranging from at the ends to in the centre.Composed of numerous parallel rows of eyebars connected by bolts, the chains are anchored in tunnels in the rocks below ground level at the sides of the gorge.