Reference · road & bridge standards

Principal bridge inspection

What a principal inspection of a road bridge is, and how often it is done.

A principal inspection is a close, detailed examination of every accessible part of a bridge, recording defects, rating condition, and scheduling and costing remedial work by year. It is the formal record of a structure's condition and of what the authority knew and planned. Ireland's bridge stock is managed under the Eirspan bridge management system.

Source: Eirspan bridge management system (TII). Stated for reference.

A reference page explaining a published road or bridge standard. It states the standard only; it makes no claim about any particular location.

Last updated 2026-08-05. This is a living record — findings are added as dated entries and prior versions remain visible.