Sandwich panels are not only self-supporting but can as well bear considerable loads. The dimensions and profile of the facings as well as the thickness and density of the polyurethane foam core are important factors. structural wall panels are used as members for ordinary loading situations: bending, shear and axial loading. In axial compression, however, there are serious structural integrity issues precisely because of their inherent efficiency; their susceptibility to highly unstable interactive buckling phenomena in practical situations is widely accepted. A typical sandwich panel consists of two facings (fibreglass flat sheet) and a core (Styrofaom) but can also contain within, for example: steel reinforcments for heavy fridge support or plywood to absorb compression forces for inner wall protection.

Sandwich panels are popular components with a very high level of prefabrication. The higher this level of prefabrication, the higher the manufacturer’s obligation to prove the usability and quality features of these components. composite sandwich panels are very popular construction materials that allow a quick and efficient method of build, offering very good insulation attributes. If designed correctly, they are not normally prone to the other and arguably more common non-fire failures, such as icing and panel delamination. Sandwich panels are produced by continuously running production plants and sawn to ordered lengths. The surfaces can also contain lined, trapezoid or corrugated profiles, depending on the customer’s requirements.

fire rated panels are being developed in Europe for use in the fireproof double hull structure of intercoastal tankers. In this example, one panel design that was tested increased crash resistance by 73 percent, while the hull depth was decreased by 2/3.