Handbook for Bridge Inspections - TSP2

Procedures
Scope
Equipment
The thi ck ness of the wearing surface may vary in a crosswise
direction for bridges on a bend.
Acceptance Inspection
A minimum of three sets of measurements must be taken along the
centre line as we ll as along each side of the bridge at 100 metre
gaps. At least four sets of measurements should be carried out per
bridge.
Measuring the thi ckness of concrete wearing surfaces should be
conducted as for locating reinforcement elements (See Chapter
7.3.1: Locating Reinforcement Elements - Measuring Cover).
Other Inspections
The need fo r taking measurements should be assessed in connection
with the visual inspection. The scope of the measurements
should be the same as for a completion survey.
* Fo lding rul e
* Drill
* Ma terial to refi ll holes
Figure 7.2-2: Measurillg Track Wear
Purpose
7.2.4 Measuring of Ruts
To measure the depth of wear in the tracks created by studded
lyres in the wearing surface.
Reference is made to rel evant procedures.
Scope
Acceptance Inspection
The measurement of track wear is not relevant.
Equipment
Other inspections
When track wear indicates a need for taking measurements, measurements
should be made in a minimum of two sections of tile
bridge - one wi th minimal, the other with maximum wear - lIsing a
straightedge. For long bridges over 200 metres, measurements are
to be taken in one section for every 100 metres. The depth of the
wear should be recorded crosswise every 250 metres.