Geology Reference
In-Depth Information
FIGURE 17.6 Bearing capacity of bedrock formations for heavy structures in the Waco area. High bearing capacity means that the
formation allows heavy structures to be supported by conventional footings and grade beams and generally no pier or caisson support
is required (jointing or faulting could modify these conditions). A high bearing capacity area represents a high capability area for this
resource use (large structures).The Austin Chalk and limestone units of the Georgetown Formation are in this category. Low to very
low bearing capacity requires heavy structures be supported by piers (into adjacent more resistant units or floating foundations. The
Pepper Shale and some units of the South Bosque Shale, the Lower Taylor Marl, and the Del Rio Clay are low to very low bearing
capacity and thus of l ow capability for large sructures. See Table 17.3 for further explanation.
(Modified from Font and Williamson, 1970; used with permission.)
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