Reasons for column settling

Structure · Columns · printed page 46 (PDF page 47)

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Book index entries

Settling Structural

Text in the illustration

load
floor joist
bearing beam
column
concrete floor slab
gravel
footing
footing too small
no footing
poor soil conditions under footing
larger than intended load on column

Generated explanation

Four side-by-side sectional diagrams show reasons a structural support column may settle. Each column supports a bearing beam beneath a loaded floor joist, with its base at a concrete floor slab over gravel and soil. The first example shows an undersized footing, and the second shows a column supported without a footing. The third depicts poor soil conditions beneath the footing, while the fourth uses larger downward arrows to indicate a greater-than-intended load on the column. Downward arrows below each assembly emphasize the resulting settlement.