4.1.1 The
design life of the linkspan is to be specified.
4.1.2 For
all critical components subject to significant cyclical loading a
fatigue assessment in accordance with a recognized National or International
Standard is to be made and submitted for consideration. This will
apply especially to all articulated connections, support points and
traffic lane structures, particularly to those spanning between a
pontoon and the shore where the effects of continuous pontoon movement
and sliding friction bearings may be significant.
4.1.3 Consideration
should also be given to details subject to small amplitude motions
of the pontoon or other buoyant support causing a high number of cycles
at low stress levels.