Handbook for Bridge Inspections - TSP2

6.5 Major Inspection of Cables
6.5.1 Objective and Scope
Inspections incorporate a visual inspection of the load-bearing
cables, suspension rods and retaining elements so as to ensure
these are fulfi lli ng their funct ion. Where necessary measurements
and examination of materials should be undertaken to supplement
the visual check and act as a basis for evaluating possible fu ture
damage and wear. See Table 7. 1-1 and Chapter 7.2
It is recommended that a special inspection is carried out whenever
the main cable inspection reveals the need for repairs or this
latter inspection has not been suffic ien tly thorough in order to
determine the kind of damage, its consequences, extent or cause.
Refer to Chapter 6. 7 ~ Special Inspections. It should be stated
which measurements! materials inspections are to be carried out,
their scope and location. See Chapter 8.2 for submitting the relevant
reports.
6.5.2 Visual Inspections
Visual inspections should be of the close type as detailed in
Chapter 6.4.2 for main inspections.
This involves carrying out a closc visual inspection of all cables
from anchorage to anchorage and around the entire cross-section,
and of both the upper and lower suspension
rods and the suspension rod clamps. In special circumstances this
special requirement can be departed from if one can with certainty
detect anticipated damage from a longer distance. Thi s can be the
case with clearly visible lengths of cable or suspension rods. In
such cases representative sections should be selected fo r closer
visual inspection whi lst the remaining areas can be inspected from
greater distances. C haracteristical ly serious damage should be ill u­
strated in photographs or sketches.
Access equipment should be used as required so that one can reach
the prescribed measuring distance. Refer to C hapter 4 .2 - Access
Equipment.
A bridge should be inspected in such a way that a ll its elements are
systematically checked. Cables, anchorages, towers and suspension
rods should be marked with a number which conforms with the
system for parts location as detai led in Chapter 2.4.3.
Individual elements are to be checked for damage, defects and
fau lts during a visual inspection as listed below. Please refer to
Chapter 9 - Damage Evaluation Catalogue
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Handbook for Bridge Inspect ions