Which one of the following statements is correct?
1. Maximum longitudinal reinforcement in an axially loaded short column is 6% of gross
sectional areas
2. Columns with circular section are provided with transverse reinforcement of helical
type only
3. Spacing of lateral ties cannot be more than 16 times the diameter of the tie bar
4. Longitudinal reinforcement bar need not be in contact with lateral ties
According to IS 456, the area of longitudinal reinforcement in a reinforced concrete
column shall not exceed 6% of the gross cross-sectional area of the column.
Other options are incorrect because:
•Circular columns may be provided with either helical reinforcement or circular lateral ties.
•The maximum spacing of lateral ties is limited to 16 times the diameter of the smallest
longitudinal bar, not the tie bar.
•Longitudinal bars must be properly restrained by lateral ties.
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