Buildings based on steel or concrete framework shall be also considered to have non-combustible walls.
3. Combustible materials are:
If the building has been made out of wooden logs, boards, or similar material and then covered with pontiff or plaster it shall still be considered to have combustible walls.
4. If the walls of the building are made out of various combustible and non-combustible materials, then the prevailing one shall be chosen. If the distribution between all the utilized materials is equal, then the building shall be considered to have combustible walls.
5. While answering the question, only the material of walls shall be considered, without additional constructional elements attached to the building.