1. It is not necessary to design nominal reinforcement to piles. Is it true?
In BS8110 and BS5400 Pt.4, they require the provision of nominal reinforcement for
columns. However, for pile design the requirement of nominal reinforcement may not be
necessary. Firstly, as piles are located underground, the occurrence of unexpected loads to
piles is seldom. Secondly, shear failure of piles is considered not critical to the structure
due to severe collision. Moreover, the failure of piles by buckling due to fire is unlikely
because fire is rarely ignited underground.
However, the suggestion of provision of nominal reinforcement to cater for seismic effect
may be justified. Reference is made to J P Tyson (1995).
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