抄録
Slabs should be moderately flat according to users’ requirement. From this concept, experiment to construct slabs under different labors was carried out at an actual building using 36 N/mm2 concrete. When required flatness were shown to finishing workers, they proposed adequate techniques to achieve them. After being approved by construction supervisors, slabs were constructed under those techniques and were measured their flatness. As the result, it was shown clearly that tamping works of unsuitable timing and displacing level pointers invent bumps very much, areas where are hard to use trowels (e.g., at pillars) are difficult to be made flat.
