minimum and maximum values of longitudinal reinforcements in columns

Question:

As per IS 456:2000, the minimum and maximum values of longitudinal reinforcements in a column as percentage of the sectional area of column are:

A) 1% and 6%

B) 1% and 4%

C) 0.8% and 4%

D) 0.5% and 8%

Explanation:

According to IS 456:2000, Plain and Reinforced Concrete Code of Practice, Clause 26.5.1.1, the minimum percentage of longitudinal reinforcement in columns shall be 0.8 percent of the gross sectional area.

As per Clause 26.5.1.2 of IS 456:2000, the maximum percentage of longitudinal reinforcement in columns shall not exceed 6 percent of the gross sectional area.

Therefore, , option C is the correct answer, as per IS 456:2000, the minimum and maximum percentages of longitudinal reinforcement in reinforced concrete columns are 0.8% and 6% respectively of the gross cross-sectional area.