Building non -combustible building structure

The utility model discloses a building non -combustible building structure, its technical scheme main points are: including setting up the pressurization water tank at the building body top, the pressure water incasement is equipped with level sensor, is equipped with the breach along vertical orientation on the lateral wall of pressurization water tank, and demountable installation has the closing plate in the breach, chamber in the middle of the pressure water incasement is equipped with and is equipped with around the breach, middle chamber have with the communicating first state of pressure water incasement portion and with pressure water incasement portion rupturable second state, the setting of liquid level sensing is at the closing plate top and in the middle of lieing in intracavity. Normal during operation, middle chamber are in first state, and the height of the water of middle intracavity and the height of pressure water incasement are equal height, and level sensor can be normally seals up the wat