Which type of footing is preferred for closely spaced columns in a row?

Explanation:

• When columns are closely spaced in a row, a continuous footing is preferred as it can efficiently support multiple columns by distributing the load along a continuous strip of concrete beneath them. Th
• is setup is economical and structurally effective when individual footings would overlap due to close spacing.

 Additional InformationCombined footing

• Used when two columns are close, and their isolated footings would overlap.

• Can be rectangular or trapezoidal depending on load and spacing.

• Suitable when one column is near a property line and cannot have a symmetrical footing.

Strap footing

• Consists of two isolated footings connected by a beam (strap).

• Strap helps transfer load from an eccentrically loaded column to a centrally loaded one.

• Used when columns are far apart but one is near a property line.

Isolated footing

• Separate footing under each column.

• Economical when columns are spaced far apart and loads are moderate.

• Not suitable when footings would overlap due to close spacing.