chapter 15 shallow foundations - Caltrans - California
Design Criteria (SDC) Version 1.7 (Caltrans, 2013), will be illustrated ... more common for footings supporting pinned columns, rectangular shapes may ...... linear (trapezoidal or triangular) irrespective of the substrate stiffness (resting on soil.
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Shallow Foundations - FHWA - Department of Transportation
support two or more columns and are rectangular or trapezoidal in shape (Figure 2-5). They are primarily used when the column spacing is non-uniform (Bowles ...
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