Backing board
Backing board
Non-combustible board with the same width and length as the test specimen and (12,5 ± 3) mm thick, used in every test to back the specimen.
SEE:
Note 1 to entry: A non-combustible board is one that, when tested to ISO 1716[10], yields a gross calorific potential (PCS) of ≤ 2,0 MJ/kg.