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Recent content by 220306

  1. 220306

    Tunnel Air Pressure Calculation, Subway Environmental Design Handbook

    Hi, I am currently using Subway Environmental Design Handbook from 1974. I am following the design sample within the book and have found out that some of the calculation do not make any sense. In section 3-91, the ß(T) values provided by the book on the Post Portal Transient look amusing...
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