Service Chamber Many

  • Joel Allsop
  • Create

When receiving survey data, you may have the location for pits as a single point with the details as attributes.  Using the Service Chamber Many you can quickly create the pits as 3d objects.

With just a Model of points/polygons, and attributes to define the dimensions (width, depth, rotation), multiple chambers can be quickly created.  Points and polygons defining different pit types can be in the same Model.  The type of chamber created will be determined by the relevant attributes.

BIM=>Trimesh=>Create=>Service Chamber Many

To create a single chamber, visit this post: Service Chamber

The first step is to set the default information used for all chamber types;

  1. Select the Data to use (Model of points).
  2. Set the Wall and Floor thickness, or enter Attribute names.
  3. Enter a prefix for the resulting Trimesh Models.

Points defining different pit types can be in the same Model.  The type of chamber created will be determined by the relevant attributes.

Common attribute names, such as DEPTH, can be used for all types.

Things to remember;

  1. When defining attributes, consistent naming must be used for all points.

Custom

Custom chambers can be created using a closed Super String that represents the internal shape of the chamber.

  • Depth: Internal depth of chamber
  • Note: Super String must be CLOSED.

By using a negative Depth, the pit will be inverted and the floor will be the roof.

Circular

  • Diameter: Internal diameter of chamber
  • Depth: Internal depth of chamber

Rectangle

  • Length: Internal length of chamber
  • Width: Internal width of chamber
  • Rotation: Rotation angle for chamber
  • Depth: Internal depth of chamber

Square

For square pits, the same attribute can be used for the Length and Width values.

Extended

  • Radius: For curved ends
    Also defines width of chamber (ie. 2 x Radius = Width)
  • Extension: Length of tangent between arcs
  • Rotation: Rotation angle for chamber
  • Depth: Internal depth of chamber

Offset Circular

A 3-point string (shown in red below) is required to define the orientation of the riser.  The horizontal ‘tail’ at the top defines the direction, and the vertical segment sets the chambers pitch.

  • Riser diameter: Internal diameter of riser
  • Chamber diameter: Internal diameter of chamber
  • Riser depth: Internal depth of riser
  • Transition depth: Internal depth of transition between riser and chamber
    • The transition depth is added to the riser depth
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