Handbook for Bridge Inspections - TSP2

For reporting refer to chapter 8.2.
6.4.2 Visual Inspection
The Visual Inspection has to be performed as a close visual inspection,
which means that the inspector must be within reach of element
concerned. This requirement can be suspended provided that
a possible defect can be detected with certainty from a longer di s­
tance. This may be the case for inspection of larger uniform steel
or concrete areas. In such cases representative areas should be
selected for close visual inspection and the remaining areas left for
observation from a larger di stance. Hi ghly stressed areas such as
bearings and joints should be subjected to close vis ual inspection.
Serious damage and characteristic defects should be illustmtcd by
means of photographs and lor sketches.
It is necessary to use the appropriate means of access to reach within
the speci fi ed distance of inspection. Reference chapter 4.2
"Access Equipment".
When perfonning the visual inspection all elements shall be surveyed
for the existence oflhe following ty pes of damage or
defects. Reference chapter 9 "Catalogue for Evaluation of
Defects".
The Ground
• Subsidence of the subso il of the roadway close to the abutments
or in the vic inity of the abutments or supports.
• Erosion of infill close to abutments or supports due to ra inwater
action
• Scouring of river bed
Figure 6.4-/ Erosioll oj£mbal1kmelll
68
Hand book for Bridge Inspections