he objective of these Regulations is to minimize fire that may occur during the stages of design, construction, operation, maintenance, and use of any kind of structures, buildings, facilities, and enterprises used by public institutions and organizations, private institutions, and natural persons as well as preventing loss of life and property due to fire that may occur for any cause in any manner whatsoever.

In our country, the reaction to fire section of the standard on fire protection of buildings was prepared in reference to the German DIN 4102 standards. Upon adoption of the European fire classes, the member states were required to amend their national legislation in line with the EU fire classes. For that reason, TS EN 14509 standard, which also includes provisions on the reaction to fire of Polyurethane (PUR) sandwich panels, has been implemented in our country within the scope of harmonization of the EU technical legislation. A direct comparison of reaction to fire classes as contained in TS EN 13501-1 and DIN 4102 standards may not provide conclusive results as they are different standards; however, the following comparison table designed based on the flammability properties of the materials can be used as reference data.