**Difference Between long Column and Short Column**

The column is the most important component of RCC structure. Various types of columns are used in the structure. According to slenderness ratio columns are divided into two types:

- Short Column
- Long or slender Column

**Short column**

A short column is the one whose ratio of effective length to its least lateral dimension is less than or equal to 12. Then it is termed as a short column.

( l_{ef} / b ) ≤ 12

l_{ef} = effective length

b = least lateral dimension of column

*Also, read – Difference Between Lap length and Development Length*

**Long or Slender Column**

A long or slender column is the one whose ratio of effective length to its least lateral dimension is not less than 12. Then it is termed as a long column.

( l_{ef} / b ) > 12

In long columns, the permissible values of stresses in concrete and steel, used for short columns should be multiplied by a coefficient C_{r } given by the following formula.

C_{r }= 1.25 – l_{ef }/48b

C_{r} = reduction coefficient

l_{ef} = effective length

b = least lateral dimension of the column

When in a column, having helical reinforcement, the permissible load is based on the core area, the least lateral dimension should be taken as the diameter of the core.

**Difference Between Short Columns and Long Columns**

S.No. | Short Columns | Long Columns |

1 | If the ratio of effective length to its least lateral dimension is less than or equal to 12 then it is called short column | If the ratio of the effective length of the column to its least lateral dimension is greater than 12 then it is called a long column. |

2 | The effective length to least radius of gyration ratio is less than or equal to 40. | The effective length to least radius of gyration ratio is greater than 40. |

3 | Buckling tendency is very low. | Long and cylinder columns buckle easily. |

4 | The crushing tendency is very high. | It has a very low crushing tendency. |

5 | The load-carrying capacity is high as compared to long columns of the same cross-sectional area. | The load-carrying capacity of a long column is less as compared to a short column of the same cross-sectional area. |

6 | The failure of the short columns is due to their crushing. | All the long columns fail due to their buckling. |

7 | It has more radius of gyration. | It has less radius of gyration. |

8 | It has a high load-carrying capacity because of its low height. | It has less load carrying capacity because of its more height. |

9 | They are subjected to compressive stresses. | They are subjected to buckling stresses. |

10 | Its slenderness ratio is less than 45. | Its slenderness ratio is more than 45. |

11 | Short columns have a large lateral dimension as compared to its height. | Long columns have a small lateral dimension as compared to its height. |

12 | The short column is stronger than a long column and it is highly preferable. | Long column is weaker than a short column and generally, it is not preferred. |

I hope now you understood the difference between long column and short column. If you find this article helpful please don’t forget to share it.

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