We present an evaluation method and a construction management index about atness of oor groundwork from a viewpoint of a foot touch. At rst, psychological scales of atness evaluation were constructed by a sensory test. Then, roughness was measured on specimens' footprint areas, and performance value was set to be corresponded with psychological scales. As a result, the evaluation method was completed. This performance value is not easy to measure and manage at every construction site, and there

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... is a wellcommon measurement method to manage floor flatness. So, we considered a quantitative relationship between performance value and management value nally.