# All About Column size for 7m span and Column design

Columns play a crucial role in the stability and structural integrity of buildings, carrying the weight of the structure and distributing it to the foundation. When it comes to designing columns, size and design are crucial factors that must be carefully considered to ensure the overall safety and functionality of a building. In this article, we will delve into the world of column size and design specifically for a 7m span, exploring the important aspects that architects and engineers must keep in mind when determining column dimensions and creating a successful design. By the end of this article, you will have a better understanding of the key elements that go into determining the optimal column size and design for a 7m span in building construction.

## Column size for 7m span and Column design Thumb rule

Column size is a crucial aspect in the design of any structure, especially when it comes to ensuring its stability and safety. In this article, we will be discussing the appropriate column size for a 7m span and the thumb rule for column design.

Firstly, let’s understand what a column is. A column is a structural member that is used to transfer the load from the roof and floors to the foundation of a building. It is an important component in a structure as it plays a significant role in resisting compression forces.

For a 7m span, the column size will depend on various factors such as the type of structure, the type and magnitude of load, and the desired height of the building. Generally, for a residential building with a 7m span, a column size of 230mm x 230mm is recommended. However, for commercial buildings with heavier loads, a larger column size of 300mm x 300mm may be required.

The thumb rule for column design is a quick and simple method used by engineers to determine the approximate size of a column. It is based on the assumption that the load on each column is directly proportional to its cross-sectional area. According to this rule, the cross-sectional area of a column should be 1% of the total floor area for buildings with a height of up to 12m. For buildings with a height of 12-20m, the column size should be 1.5% of the total floor area.

In the case of our 7m span, assuming a building height of 12m, the total floor area will be approximately 84 square meters. Applying the thumb rule, we can calculate the column size as follows:

1% of 84 square meters = 0.01 x 84 = 0.84 square meters

As column size is represented in terms of width and depth, we can consider a square column with equal sides. Hence, the column size will be the square root of 0.84 square meters, which is approximately 0.92 meters. Therefore, the recommended column size for a 7m span as per the thumb rule is 0.92m x 0.92m.

Apart from the size, the design of the column also plays a critical role in the stability of a structure. Column design involves considering factors such as load type, column material, and the overall structural configuration. It is crucial to consult a structural engineer for the design of columns as their experience and expertise can ensure the structural integrity and safety of the building.

In conclusion, column size is a vital aspect in the design of any structure, and careful consideration must be given to determine the appropriate size based on various factors. While the thumb rule can provide a quick estimation, it is always recommended to consult a structural engineer for the final design of columns for any building.

## Conclusion

In conclusion, the selection of column size for a 7m span and the corresponding column design is a crucial aspect in any construction project. The accurate calculation and analysis of load-bearing capabilities, as well as following building codes and regulations, are essential in ensuring the structural integrity and safety of the building. Factors such as material properties, column spacing, and load distribution also play a significant role in determining the appropriate column size and design for a 7m span. By considering all these factors, engineers and architects can ensure the successful construction of a strong and durable building. It is always recommended to seek professional expertise and adhere to industry standards when making decisions regarding column size and design to ensure the longevity and safety of the structure.