CAD Model Design - How to specify an Angle to South

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

When importing a DXF file into CAD Input in Design Database, you must specify an angle through the model to South. The methods below explain how to calculate this angle.

Method

The angle to south should be specified as the clockwise angle in degrees between a line drawn vertically downwards through the drawing and south.

Example 1

In this example, South is specified towards the lower left of the drawing. When a line is drawn vertically downwards through the drawing, the angle to south calculated would be 45˚.

Example 2

In this example, South is to the top right of the drawing. When a line is drawn through vertical in the drawing and the angle considered, it would generate an angle to south of 225˚.

Notes

If you find you have specified your angle incorrectly it can be changed in CAD Input, by selecting the Defaults menu, then the Default data menu option. A new angle can be entered in the input box down the right hand side of the dialog.
The Design Database Print function can be used to validate the orientation of your room surfaces. For example, the below building has an Angle to South of 0 degrees.

In version 25 and earlier, the compass rose in the lower right of the screen indicated the direction to south on the drawing plan
From version 26 - to help alleviate confusion and align with convention - the compass rose will indicate the direction to north