Spiral reinforcement has more flexibility and ductility. Spiral column can sustain large deformations before the final collapse. Tied column fails suddenly due to excessive loads. Spiral column shows deformation or indication before the complete failure.
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Answer:
Spiral reinforcement has more flexibility and ductility. Spiral column can sustain large deformations before the final collapse. Tied column fails suddenly due to excessive loads. Spiral column shows deformation or indication before the complete failure.