Handbook for Bridge Inspections - TSP2

When inspecting suspension bridges, trusses and arch bridges the
manoeuvrabili ty of the bridge lift is of outmost importance. The
basket must be able to move easily in and out between the vertical
and diagonal elements. See figure 4.2- 12. When inspecting minor
through truss bridges the bracing of the top boom may restrict the
movement of the bridge li ft considerably.
Bridge Width
Railings/Light Posts
Figure 4.1-11 Illspeclioll of a Tmss Bridge (K-lifi)
The space needed for the different types of bridge lifts when the
supporting legs are in place varies and has to be considered, especially
on narrow bridges, in order to cause as few problems for the
traffic flow as possible.
When footwalks are separated from the roadway by rai ling, this
may influence the required range oflhe bridge li ft in ease it has to
be used from the roadway only. Moving past light posts may hamper
the speed of the in spection considerably. There are bridge lifts
in the marked suitable for pass ing light posts and other obstructions
without delay, see Figure 4.2-13.
Figure 4.1-13 Passing a Flagpole (Nummela Brulifi)
Handbook for Bridge Inspections 37