参考文献
[1] ISO 12468-1：2003 External exposure of roofs to fire—-Part 1：Test method
[2] ISO 12468-2：2005 External exposure of roofs to fire—Part 2：Classification of roofs
[3] ENV 1187：2002 Test methods for external fire exposure to roofs
[4] EN 13501-5：2005 Fire classification of construction products and building elments—Part 5：Classification using data from external fire exposure to roofs tests
[2] ISO 12468-2：2005 External exposure of roofs to fire—Part 2：Classification of roofs
[3] ENV 1187：2002 Test methods for external fire exposure to roofs
[4] EN 13501-5：2005 Fire classification of construction products and building elments—Part 5：Classification using data from external fire exposure to roofs tests