| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor panel which is low in price and excellent in formability and moreover has high floor face quality in the floor panel for spreadly forming the floor face of a clean room, etc. SOLUTION: Bearing bars 3 where space gaps 4 are provided in parallel to a frame piece 8 among mutually adjacent bars are provided side by side inside the frame of a square panel frame part 2. The bearing bar 3 has a different shaped groove form where both side edges of an upper face plate 5 to form a floor face are curvedly formed into a long flange plate 6 and a short flange plate 7, and is provided with a single bar-shaped middle reinforcing bar 10 which is located at the middle of the frame piece 8 and arranged perpendicularly to the bearing bar 3 in an attitude put side by side and a is insertedly fitted in the through hole 11 of the long flange plate 6 and the U-shaped groove 12 of the short flange plate 7 to perform a welding 13, and the three kinds of components, namely the panel frame part 2, the bearing bar 3 and the middle reinforcing bar 10, are unitedly stuck one another and assembled.
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