Cable Tray

This section describes how to use cable trays.

Common Cable Tray Information

The values that can be specified for cable trays are listed below.

Group: The group to which the cable tray is assigned. The group controls the layer on which the cable tray is inserted. See the Cable Tray Groups section for more information on creating cable tray groups.

Starting Elevation: The starting elevation of the cable tray. The location of the starting elevation of the cable tray is set by the vertical alignment.

Ending Elevation: The ending elevation of the cable tray. The location of the ending elevation of the cable tray is set by the vertical alignment. See the Elevation section for more information.

Vertical Alignment: The vertical alignment specifies what location on the cable tray the starting and ending elevations refer to.

Center of Cable Tray: The elevations refer to the centerline of the cable tray. The cable tray will extend both above and below these elevations.
Top of Cable Tray: The elevations refer to the top of the cable tray. The cable tray will extend below these elevations.
Bottom of Cable Tray: The elevations refer to the bottom of the cable tray. The cable tray will extend above these elevations. If the cable tray has hangers, they will extend below this elevation.
Bottom of Hanger: The elevations refer to the bottom of the hanger for the cable tray. The hangers and the cable tray will extend above these elevations. If there is no hanger, the bottom of the cable tray will be at these elevations.

Horizontal Alignment: The horizontal alignment specifies what the cable tray construction line refers to.

Centered: The construction line is the centerline of the cable tray. The cable tray extends to both sides of the construction line. Any transitions in the cable tray are concentric.
Flat on Left: The construction line is the left edge of the cable tray. The cable tray extends to the right of the construction line. Any transitions in the cable tray will be eccentric, with the flat edge on the left.
Flat on Right: The construction line is the right edge of the cable tray. The cable tray extends to the left of the construction line. Any transitions in the cable tray will be eccentric, with the flat edge on the right.

Width: The width of the cable tray, in inches. This size should be the actual exterior dimensions of the cable tray. The exact value is used to draw the cable tray for collision detection purposes.

Depth: The depth of the cable tray, in inches. This size should be the actual exterior dimensions of the cable tray. The exact value is used to draw the cable tray for collision detection purposes.

Radius: The inside radius of the fittings in the cable tray.

Elbow Type: The graphic that is used for elbows in the cable tray. Tees and crosses look the same for both selections.

Square-Radius: The inside edge of the elbow is curved. The outside edge of the elbow is square.
Cable Trays--example square-radius fitting

Layer System: See the Layer System section for more information.

Hanger Type: The type of hanger. Controls whether hangers are included and their graphics.

None: No hangers are included. The other hanger fields will be disabled.
Wrap: The hanger will wrap around the item. A single support rod will be inserted in the middle of the item.
Trapeze: The hanger will be a support underneath the item with two support rods on either side.

Size: The size of the hanger, in inches. The size is used to control most of the dimensions of the hanger graphic. The support rod diameter will be equal to the size. Other dimensions will be scaled based upon the size.

Hanger Depth: The distance the hanger extends below the item, in inches.

Starting Offset: The distance from the start of the centerline to the location of the first hanger, in inches.

Ending Offset: The distance from the end of the centerline to the location of the last hanger, in inches.

Spacing: The distance between hangers between the first and last hanger, in inches.

Left Width: The distance the hanger extends to the left side of the centerline, in inches.

If the value is 0, the hanger will be wide enough to support the item.

If it is greater than 0, the hanger will extend exactly that distance to the left of the centerline. It is possible this distance will be less than the width of the item it is support. In that case, you need to increase the width. A width greater than necessary to support the specific item can be used to support a rack of items or to allow for future expansion.

Right Width: The distance the hanger extends to the right side of the centerline, in inches.

If the value is 0, the hanger will be wide enough to support the item.

If it is greater than 0, the hanger will extend exactly that distance to the right of the centerline. It is possible this distance will be less than the width of the item it is support. In that case, you need to increase the width. A width greater than necessary to support the specific item can be used to support a rack of items or to allow for future expansion.

Ending Elevation: The elevation where the support rods end. The support rods will be drawn from the item up to this elevation. See the Elevation section for more information on specifying this elevation.


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