Dalginross Bridge carries the B827 across the River Earn in Comrie. It is a three-span iron girder bridge set on stone piers, which was designed by Sir William Arrol & Co. and built in 1904-5. To be more precise, the bridge is a constrained cantilever design, where the centre span consists of 2 cantilevers which meet at a single pin joint. The two side spans then counterbalance the central cantilevers, being tied at the abutments and pivoted on the piers - although little movement actually occurs. The bridge was the first of its type to be built in Britain, and remains an unusual design.
The deck across the bridge carries a wide 2 lane road with pavements on either side. The parapets are iron railings with four stylish lamp columns rising above the piers. Strengthening work was undertaken in 2000 to ensure the bridge remained fit for purpose, and this involved inserting more steelwork under the deck, but in keeping with the original structure.
