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WORK PACKAGE 9: PRACTICAL BRIDGE MANAGEMENT - page 23 / 67

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SAMCO Final Report 2006 F09 Report on Bridge Management

date and type of inspection and an overall assessment of the structure as either good, fair or poor.

The forms include a list of 33 structural items (e.g. foundations, piers or columns, abutments, wing walls, retaining walls, approach embankments, fenders, bearings, main beams/tunnel transverse beams, diaphragms, concrete slabs, waterproofing, surfacing, expansion joints). Any defects observed on any of these structural items are assessed in terms of the estimated costs, extent, severity, work and priority. Table 3 defines the four categories for the extent of any damage that is present and Table 4 defines the four categories of severity of the damage. Table 5 lists the seven types of recommended work. Table 6 lists the eight investigation types, which can only be used when actual work is not recommended and Table 7 lists the three levels of priority.

Extent A B C D

Description No significant defect Slight, not more than 5% of length or area affected Moderate, 5 to 20% affected

Extensive, more than 20% affected Table 3. Extent of damage.

Severity 1 2 3

Description No significant defects Minor defects or of a non-urgent nature

Defects which shall be included for attention within the next annual maintenance programme

4

Severe defects where urgent action is needed Table 4. Severity of damage.

Work A B C P N R S

Description Add (new items to be provided, e.g. waterproofing) Item present but not inspected Change (e.g. replacement of a defective bearing or parapet) Paint No action at present, monitor only Repair/maintain (repair to concrete, clean grease, rod etc….) Silane impregnation

Table 5. Action types.

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