Bowstring bridge is an arch bridge in which the outward-directed horizontal forces of the arch are borne as tension by a chord tying the arch ends, rather than by the ground or the bridge foundations. This strengthened chord may be the deck structure itself or consist of separate, deck-independent tie-rods.
- Much like a through-truss bridge, except that the truss can be a higher, deeper segmental curve.
- Suitable for 50m - 150m spans.
- Can be constructed on less robust foundations e.g. atop elevated piers/areas of uneven soil.
- Can be pre-fabricated offsite and hauled or lifted into place.
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