This concrete foundation detail shows a step in the soffit of a mat footing with varying thickness. Typical reinforcement is sized per plan throughout the slab sections. Bottom bars transition the vertical offset with hooks and a Class B lap splice connecting the reinforcement across the step transition.
STEP AT SOFFIT TYP REINF SEE PLAN THK MAT FOOTING THK MAT FOOTING LAP SPLICE "CLASS B" . HOOK BOTTOM BARS
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