What is the purpose of combined footings?

• A. Carry column loads at two or more points
• B. Carry column loads at a single point
• C. Provide decorative features
• D. Reduce soil bearing pressure by spreading across ground

Answer: (A)

Combined footings are used when two or more columns are close enough that their loads need to be supported by a single base rather than separate bases. by combining, the footing carries the loads from all those columns on one shared concrete base, distributing that combined load into the soil and helping keep the columns’ settlement more uniform. This setup is especially helpful when columns are near each other or misaligned, so their individual footings would otherwise interfere or cause differential settlement.

So the main purpose is to carry column loads from multiple columns on one footing, rather than just supporting a single column. Decorative features aren’t the goal, and carrying a load at a single point would use a separate footing for one column. While spreading the load helps reduce bearing pressure, the defining purpose of a combined footing is to support two or more columns with a single base.