There are two further favourable factors: the absence of asbestos coating on the metallic posts of the structure, which are protected from fire by being enclosed in concrete; and the long experience of asbestos removal professionals in the City of New York.
另有两个有利因素：结构的金属柱上未覆盖石棉，这些金属柱外层的混凝土可以防范火灾；纽约市清除石棉专业人员拥有长期经验。