Codes and Standards‎ > ‎Industry‎ > ‎Building Codes‎ > ‎


A new regulation has been set up and uses European test standards. 

Japan regulation and test method 

Test method / classNon-combustible materialsQuasi-noncombustible materialsFire retardant materials
Cone calorimeter test ISO 6550-1 at 510KW/m2
In addition to the numerical criteria, the specimen shall not develop cracking enabling fire penetration.
Non-combustibility test ISO 1182--
Model box test ISO CD17431-
The non-combustibility test and the model box test are alternatives for the cone calorimeter test.
Gaz Toxicity test on 8 micesMovable time > 6.8 min
  qtot: total heat evolvedQtot: total heat evolved
  q"max: maximum value of heat releaseQmax: maximum value rate of heat release

(1) Defined as the difference between the maximum temperature during 20 min and the final temperature in the end of the test. 

The ISO 5660 cone calorimeter test method 

The principle of the cone calorimeter is based on the relation between the oxygen consumption and the heat release during the combustion. The ratio between the heat release and the weight of oxygen consumed is a constant (Huggett constant) equal to 13100kJ/kg. 

On this relation, Babraukas have conceived and build the first prototype of the cone calorimeter at the laboratory of NIST in the 80's. A heat flux is applied on a sample that is placed on a load cell. Gases and smokes are collected in an exhaust pipe where the measures of oxygen consumption, of temperature, of opacity of smoke take place. 

Samples (100 x 100 mm) are exposed under a heat flux of corresponding to the fire conditions simulated. An electrical spark igniter ignited volatile gases from the heated specimen. The test gives the opportunity to evaluate:
  • RHR: Rate of Heat Release,
  • Weight loss,
  • Emission of CO and CO2,
  • VSP: Volume of Smoke Production,
  • Soot mass.

The cone calorimeter test is, for the moment, the most advanced method for assessing materials reaction to fire.