ASTM E152 Time- temperature curve

When testing the fire resistance of constructions different time-temperature curves can be used.

The time-temperature curve corresponds to different types of fire scenarios where the standard time-temperature curve in accordance with ASTM E 152 represents a normal room fire. In certain cases for example tunnel constructions other fire scenarios can be chosen for example the RWS-curve which contains a rapid heat phase to high temperatures.

The function of the standard time-temperature curve is: 

The temperature is the average furnace temperature, in degree Celsius in minutes. The function for the HC-curve is: 

 

The temperature is the average furnace temperature, in degree Celsius in minutes.

The RWS-curve is based on tabulated values as follows:

Time (minutes)                     Temperature (°C)

0                                          20

3                                          890

5                                          1140

10                                        1200

30                                        1300

60                                        1350

90                                        1300

120                                      1200

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