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How to Install a Weir Box

While Weir Boxes take away many of the normal installation considerations of Weir Plates, there are some considerations that have to be taken into account when installing a Weir Box.

Installing the Weir BOX

  • The Weir Box must be mounted so that the weir plate is level from front-to-back and from side-to-side.

  • The mounting surface of the weir box should be sufficiently consolidated that it will not shift or move out of position due to settlement, frost heave, etc.

  • The weir crest must be horizontally level.

  • If present, the bevel of the weir crest must be set downstream.
  • In earthen channel applications, the channel downstream of the Weir Box should be reinforced / armored so that scour does not occur.  Scouring can lead to the Weir Box shifting out of position.