Handbook for Bridge Inspections - TSP2

fo rcement el ements with a resultant increase in the extent of spa l ~
ling. In tum this will lead to increased repair costs. A d egree of
damage of2 has been given for maintenance costs (M).
The bridge is si tuated in an urban environment; consequently s p al~
ling and corroded reinforcement present a very unsatisfactory
impression for bridge users. A score of 3 has thus beeIll allocated to
environment and overall appearance (E).
5.5 Prioritising
Maintenance
When evaluating damage as already described in Chapters 5.3 and
5.4 it will be possib le in the future to draw up a consciously
thought out prioritisat ion of what damage should be repaired only
once the consequences of possibly de laying maintenance for bud~
getary reasons have become known.
However, maintenance should be carried out as and wilen described
in an inspection jfthe damage affects carrying capac ity or traf~
fie safety. Should such maintenance be delayed for budgetary
reasons, the consequences may well be a reduction in traffic flow
or the implementation of safety measures.
Additionally when prioritising maintenance one ought to take into
consideration the fact that items of less serious damage can be
delayed if its locat ion allows it to be postponed and easily included
with repairs of serious damage using the same rig or scaffolding.
Table 5.5~ I shows an exampl e of prior it ising and grouping m a int e~
nance tasks as indicated in the previous paragraph.
Priority Element - Damilge Degree of Damage & Time (Of Maintenance
Consequences
I Parapet 4T At unce or within 6 montlt~
- end piece 4T at Lhc:: !~test
Joints
- loose screws
2 Wearing course 3M,2T Ought 10 be carried out
-ru"
within 3 years, hut can be
I OOSIDOnoo a Iitl le
3 ae,~ Ought to be tarried out
- paint damage 2C, 3M within 3 years, but tan be
postponed for 4 to 10 years.
Cross girders
All of these elements require
- rdnforccmtnt torrosion maintenaoce simultaneously
2e, 3M as they also need staffolding
Bearings
on the undersid e of the
- cleaning 3M bridge.
- ad iustments 2M
Table 5.5-1: Priori/ising alld GroupingojMaimell(lnce Tasks