If a footway is added about o 4 ton per ft.
The river is crossed by St John's Bridge of nine arches, completed in 1772 from the designs of John Smeaton and widened a century later; by Victoria Bridge, a modern structure connecting South Street with Dundee Road; and farther south (at the end of Tay Street) by a footway alongside of the viaduct belonging to the Caledonian railway.
They are built with their upper storeys projecting over the footway and supported on columns so as to form arcades; beneath these are deep cellars extending under the squares themselves.
The main suspension chains are carried across the centre span in the form of horizontal ties resting on the high-level footway girders.
Therefore every highway - whether carriage-way, driftway, bridleway or footway - which can be shown to have been in use before 1836, is presumably repairable by the inhabitants at large, the only exceptions being such highways as are repairable by private persons or corporate bodies ratione clausurae, ratione tenurae, or by prescription.