The main structures such as poles and beams. Must have a fire resistance rate of not less than 3 hours, the floor must have a fire resistance rate of not less than 2 hours.
The main structures such as pillars and beams have the fire resistance of at least three hours, the rate must be fire resistant for at least two hours.
The main structure, such as a post and beam must have the fire resistance rating of not less than 3 hours. The floor requires fire resistance rating of not less than 2 hours.