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

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RRB JE CE 22 Apr 2025 Shift 2 CBT 2 Official Paper
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  1. Continuous footing
  2. Combined footing
  3. Strap footing
  4. Isolated footing

Answer (Detailed Solution Below)

Option 1 : Continuous footing
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Detailed Solution

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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.

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