| 摘要 |
<p>A tray (11) for a composite deck comprises a sheet steel profile with a wide lower flange (12) as a bottom, two webs (13, 14) and stiff upper flanges (15, 16) that extend above an insulation board (22) in the tray. The insulation board is not cemented to the steel. It is stiff enough to permit people to walk on it and to prevent the webs from tilting inwardly. The webs of adjacent trays support each other so that they cannot tilt outwardly.</p> |
