Self-supporting metal panel, insulated with polyurethane, for flat and pitched roofs, to be weather-proofed on site.
The external side of the panel has a base covering in bitumenised feltpaper for the application of waterproofing linings.
TABLE OF SAFE SPANS
The spans l in metres, as a function of a uniformly distributed overload p (daN/m2), have been calculated to provide a deflection f <=l/200 considering only the sheet as the resisting cross-section (the contribution of the polyurethane has not been taken into account) in accordance with standard UNI CNR - 10022/84 and the AIPPEG design guidelines.
Data for the 0.5 mm thickness sheet has been obtained from laboratory tests.