The measures required for ageing management purposes depend on the maintenance strategy implemented (cf. Figure 9.2). As well as the maintenance work itself, these include the inspections with regular tests and special tests, repairs and strengthening in the event of structural changes.

The basic procedure for conducting ageing management to KTA 1403 is shown in Figure 9.3 (PDCA cycle). Ageing management is knowledge-based, incorporating all information on structural systems and being constantly updated.

Inspections and structural examinations are used to establish what condition each structure is in, and to detect faults and changes. They are conducted at regular intervals in accordance with specified structural lists and the results recorded in status reports, so that trends can be followed in status reports and any faults observed can be assessed and repairs made.

Structural examination methods are laid down in instructions. Each examination is normally followed by visual checks, simple measurements or as part of geodetic survey programmes, using preset criteria to specify more intensive examination methods.

In terms of reporting, KTA 1403 requires specific system basic reports, annual status reports and building status reports for structural systems (every 10 years). The basic report describes the process of ageing management, including organisation, and includes ageing relevant findings. Status reports contain details of ageing relevant activities and measures, findings and results during the reporting period. Building status reports are designed to show that safety-related structures have been assessed to see how they have aged.

Basic and status reports, which both cover mechanical engineering, electrical engineer­ing and structural engineering, may also include individual specialist reports. For structural systems, for example, a ‘Basic report — structural engineering’ and ‘Status report — structural engineering’ (including building status report issues), can be prepared.