In this lecture, I have discussed briefly the important column reinforcement details that every civil engineer must know. I have also discussed, what are long columns and short columns? Watch the complete video to boost your civil engineering basic knowledge.
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As per IS 456 2000, Column is a compression member, the effective length of which exceeds three times the least lateral dimension. By the term “Least lateral dimension” we mean the smaller side of the column cross-section.
For illustration, if we have a column of size 230mm x 450mm its least lateral dimension would be 230mm. Similarly for a column of size 200mm x 300mm, the least lateral dimension would be 200mm. As per the definition of a column, the minimum effective length of a 230mm x 450mm column should be 3 x 230 i.e. 690mm and for the column of size 200 x 300 mm, the effective length shall be at least 3 x 200 i.e., 600mm. However, if the effective length is less than the least lateral dimension, such a member is called a “Pedestal”
If the slenderness ratio of a column is greater than 12, such a column is termed as ‘Long Column’, and if this ratio is less than 12, then it would be called a ‘’Short Column’’.
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