The fire rating of polycarbonate corrugated roof panels is usually
defined according to relevant national standards. In China, it is
mainly based on the GB 8624 "Classification of Burning Behavior of
Building Materials and Products" standard. The following are the
specific contents:
GB 8624 standard classification: This standard divides the
combustion performance of building materials and products into four
levels: A, B1, B2, and B3.
Grade A: Non combustible materials such as stone, concrete, etc.,
will not burn in a fire and produce almost no heat or smoke.
B1 level: Flame retardant material with good flame retardancy. It
is difficult to ignite, micro ignite, or carbonize when exposed to
open flames or high temperatures in the air. Once the fire source
is removed, the combustion or micro ignition will immediately stop.
If the polycarbonate corrugated roof panel reaches B1 level, it
indicates that it has a certain degree of fire resistance and can
delay the spread of fire to a certain extent.
B2 level: Combustible material, which will immediately ignite and
burn when exposed to open flames or high temperatures in the air,
and the flame propagation speed is fast, but the combustion
performance is better than B3 level materials.
B3 level: Flammable material, highly flammable, high fire hazard.
Fire rating determination of polycarbonate corrugated roof panels:
Generally speaking, high-quality polycarbonate corrugated roof
panels can meet the B1 fire rating standard after modification
treatment such as adding flame retardants and testing by
professional organizations. The detection process mainly includes
testing the combustion characteristics, smoke production
characteristics, combustion droplets/particles, and other aspects
of the material. For example, under specified test conditions, the
combustion time, combustion rate, presence of combustion droplets,
and smoke generation of materials are measured, and their fire
rating is determined based on the comprehensive performance of
these indicators.
Different countries and regions may have different fire safety
standards and testing methods, such as the EU's EN 13501-1
standard, the US's UL 94 standard, etc. If polycarbonate corrugated
roof panels are used for export or in foreign projects, the fire
rating needs to be defined and certified according to the
corresponding national or regional standards.
