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The purpose of this study is to examine a relationship between loads of lower limbs during concrete finishing work and slab flatness. Experiments were taken with 5 different concretes and forms which were size of 2,700 mm × 3,600 mm. Electromyogram (EMG) signals during work were recorded from 4 muscles of lower limb of skilled laborer and sensory tests about workability were taken. Slab flatness was measured with straightedge method. Results showed that at lower workability concrete, the integrated EMG were greater and slab flatness was low grade. It was suggested that the loads influenced slab flatness.

INFLUENCE OF LOADS OF LOWER LIMBS DURING CONCRETE FINISHING WORK UPON SLAB FLATNESS