自从建筑设计中广泛应用钢结构这一结构型式以来 ,其防火保护问题便接踵而来。到目前为止 ,被业内人士认可的办法仍然是对钢结构可能受火的部分进行包裹覆盖或涂覆防火涂料 ,形成保护层 ,起到隔热的作用 ,降低火灾时热量传向钢结构的速度 ,延长其承载时间 ,从而给人以逃生、抢 Since the structural design of steel structure is widely used in architectural design, the problem of fire protection comes one after another. Until now, it has been recognized by industry insiders that the part of the steel structure that may be subject to fire is covered or coated with a fire-retardant coating to form a protective layer that acts as a thermal insulation to reduce the rate of heat transfer to the steel structure during a fire , To extend its carrying time, giving people to escape, grab