# All About Column size for 8m span and Column design

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Columns play a crucial role in the structural integrity of a building, providing support and stability to the overall structure. When it comes to designing columns, size is a critical factor that requires careful consideration. In this article, we will delve into the specifics of column size for an 8m span and discuss the key aspects of column design. By understanding the fundamentals of column size and design, engineers, architects, and builders can ensure the safety and stability of their structures.

## Column size for 8m span and Column design Thumb rule

As a civil engineer, one of the important aspects of designing a structure is determining the size and dimensions of columns. In this scenario, we will discuss the column size for a span of 8 meters and the thumb rule for column design.

Column size for 8m span:

The span of a structure refers to the distance between two supports or columns. In this case, the span is 8 meters, which means that the column will be able to support a horizontal distance of 8 meters. The size of the column required for this span depends on various factors such as the type of structure, the load it will be subjected to, and the type of material used.

For an 8m span, a square or rectangular column with a size of 400mm x 400mm or 450mm x 300mm is considered suitable for most building structures. However, for taller structures or heavy loads, the size of the column may need to be increased to provide sufficient strength and stability.

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Another important consideration when determining the column size is the spacing between columns. The closer the columns are spaced, the smaller the size of the column can be. However, for longer spans, a larger column size may be required to avoid excessive deflection or bending.

Column design Thumb rule:

When it comes to column design, there are several thumb rules that are commonly used by civil engineers. These rules are based on past experiences and provide a quick estimation of the size and dimensions of columns. One such thumb rule for column design is the 1:6 rule.

According to this rule, the minimum size of a column should be 1/6th of the span it supports. In the case of an 8m span, the minimum size of the column should be 1,333 mm or approximately 1,400 mm. This rule is applicable for normal reinforced concrete columns and can be used as a basic guideline for initial calculations.

However, it is important to note that thumb rules should not be solely relied upon for column design as they do not take into account the specific load and structural requirements of a project. It is recommended to use more advanced design methods and techniques to ensure the columns are appropriately sized and designed for the specific project.

In conclusion, the column size for an 8m span depends on various factors and can vary based on the specific project requirements. While thumb rules can provide initial estimations, it is essential to use advanced design methods for accurate and safe column design.