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Handbook for Bridge Inspections - TSP2

Handbook for Bridge Inspections - TSP2

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5.6 Cause(s) of Damage<br />

The most common causes of damage have been gathered and systematised<br />

using the two digit codes detailed in the foll owing section.<br />

There can be several causes of damage.<br />

Figllre 5.6-1: Hairlinefraell/res &<br />

cmch causetl by Defecl No. 15<br />

Alkalille Reactil'e Materials<br />

Visual checks, suppl emented by measurements and materials testing,<br />

fo rm the basis of determining the cause of damage. However,<br />

a thorough knowledge of tile planning, construction and management<br />

of bridges is also important. The success ofa repair depends<br />

often on correctl y determin ing the primary cause of the damage<br />

when describ ing repairs.<br />

There is no requirement to provide the calise of damage after an<br />

infonnal inspection, but the cause of damage must be given after<br />

all other types of inspection whenever possible.<br />

"-igure 5.6-1: Corroded rein<strong>for</strong>cemenl<br />

due 10 Defect No. 31<br />

Incorrectl), Placetl reillf orcemenl &<br />

No. 34 bwif.jicient Finishing<br />

" ,<br />

Figllre 5.6-3: Hairlille Fractures &<br />

Cm cks dlle to Defect No. 61 Traffic<br />

Loads<br />

Figllre 5.6-4: Gap c(llI.\·el! by traffic<br />

impaci (No. 71)

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