Gullies – roof drainage: Syphonic systems, discharge characteristics (NT VVS 081)

  • Report #: NT VVS 081
  • Approved: June 1990
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  This NORDTEST method specifies a procedure to determine the capacity and the characteristics of rainwater gullies especially designed for and used as a part of a syphonic roof drainage system. This method is not applicable for determination of the capacity of gullies used in other system types.  
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