Ductwork Double Lines Are Overextended « Knowledge Base

Ductwork Double Lines Are Overextended

Posted on March 20th, 2019. Last updated on June 14th, 2023.

Problem: When you draw the double lines for your ductwork, certain ducts extend far beyond where they should stop.

Cause: If two pieces of ductwork are almost, but not completely, aligned, sometimes the previous duct will overshoot the next duct when double lines are drawn, as shown in this image:

Solution: Straighten the duct using the Straighten Next Ducts command.

1. Find the duct that is being overextended.

2. Run the Straighten Next Ducts command and select the previous duct to the one that is overextended.

The duct will be straightened and the double lines redrawn.

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Bring Objects in Front of Ductwork

Use the Move Entity Above/Below Ductwork commands to set whether objects on the drawing should be hidden by ductwork when using the standard CAD HIDE command.

How to Hatch Ductwork

You can display hatches on ductwork using the Layers customization command.

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Design Master HVAC cannot calculate the CFM for ductwork loops. You can solve this by running the Coordinate Drawings and Database command if you have no loops on the drawing, removing the loop, or modeling the loop differently.

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Transitions can be added to a straight section of ductwork using the Break Duct command.

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If the centerline of your ductwork appears to be too wide, you may need to change your DIMSCALE setting.

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You can set your ductwork to be drawn with dashed lines using the Layers customization command.