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Are load bearing elements more cost effective than drilled shafts?

Several factors affect the decision on whether drilled shafts or LBEs are more cost effective. The type of soil and bedrock being penetrated, the distance of the top of rock from the working surface, and the design column loads are the most important considerations. Lighter column loads often dictate the use of drilled shafts. Heavier column loads and therefore greater penetrations into harder bearing soils and bedrock often make LBEs more efficient. Also, equipment mobilization and set up costs affect this decision. If slurry wall technology is already onsite, LBEs may be the foundation element of choice. 

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