Archaeology Notes

Event ID 787695

Category Descriptive Accounts

Type Archaeology Notes

Permalink http://canmore.org.uk/event/787695

NN72SE 38 77365 21912

Dalginross Bridge [NAT]

OS 1:10,000 map, 1978.

This steel girder road bridge over the River Earn at Comrie was designed and built by Sir William Arrol and Company Limited in 1904. The bridge is some 200 ft long with a centre span of 90 ft, the two side spans being 55 ft in length. It is of unusual design known as 'Constrained Cantilevers', the cantilevers meeting at the centre of the span and connected by a pendulum link. The piers and abutments are of sandstone, the river piers being founded on caissons 25.5ft in length, 6ft in width and 10ft in depth. The bridge sits on four main girders and the walkways are on cantilevered brackets. Local authority requirements conditioned its design.

Sir William Arrol and Company 1909; J R Hume 1977.

(Location cited as NN 773 219). Dalginross Bridge, built 1904, engineers Sir William Arrol and Co. A three-span steel girder bridge with two double cantilevers supported on masonry piers. The first 'constrained' cantilever bridge in Britain, its design was conditioned by local authority requirements as to loading and overall height, and by aesthetic considerations. Overall length 200ft (61m).

J R Hume 1977.

Dalginross Bridge was given the 2001 conservation commendation award by the Saltire Society's Civil Engineering Award Committee. The bridge has been strengethened by 'the seeding in' of additional girders without loss of appearance.

Institution of Civil Engineers, PHEW Newsletter, Issue 93 (March 2002), 3

This bridge carries the B827 public road over the River Earn between the villages of Comrie (NN72SE 64) and Dalginross (NN72SE 65), to the N and S respectively. It thus forms a southwards continuation of Bridge Street, Comrie.

The location assigned to this record defines the approximate midpoint of the span. The available map evidence suggests that it extends from NN c. 77372 21892 to NN c. 77355 21935.

Information from RCAHMS (RJCM), 25 May 2006.