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Extended Question: To model a raft foundation, should I select the mat option, or should I and assign the thick-plate formulation to a slab-on-grade?
ANSWER: A raft foundation may be modeled using either the the mat option or , and either a thick -plate slab-on-gradeor thin plate formulation. The only difference in output involves slight variations in rebar between a mat, slab or footing option are in detailing. Analysis and design is otherwise the same.
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