Fire rating of gypsum board.

The fire protection rating of gypsum board has reached B1 level, which means that it belongs to a relatively safe category in building materials.

If gypsum board is combined with light steel keel, its fireproof performance can be further improved, even reaching the standard of A-class fireproof material.

This good fireproof performance is attributed to the main raw material of gypsum board-building gypsum, which is a non-combustible material.

When a fire breaks out, the gypsum board will release the chemical water stored inside, which can not only effectively reduce the temperature of the surrounding environment, but also prevent the fire from spreading further. Therefore, gypsum board shows fire resistance in practical application, and its fire resistance limit can usually reach more than 2 hours.