Combined Footing

Definition

A combined footing is a concrete footing that supports two or more columns.

Purpose

The purpose of a combined footing is to distribute the load from multiple columns over a larger area, particularly when columns are closely spaced or near property lines where individual footings might not be feasible.

Examples of Use

• Combined footings are used in buildings where columns are positioned close to each other and individual footings would overlap.
• In situations where a column is near a property boundary, a combined footing can help ensure the load is distributed without encroaching on neighboring properties.
• Industrial structures with heavy loads might use combined footings to ensure stability and even load distribution.

Related Terms

• Isolated Footing: A single footing supporting one column.
• Mat Foundation: A large slab supporting multiple columns and walls.
• Strip Footing: A continuous footing that supports a line of columns.

Notes

Combined footings must be carefully designed to handle the loads from multiple columns and ensure even distribution to prevent differential settlement.