Turn Rule (HVAC)

	This task explains the turn design rule for HVAC Design.
	The turn design rule included with this application is used by the routing a run function. See Routing a Run for more information. HVAC ducts cannot be bent, therefore the HVAC turn rule does not determine a bend radius as in other applications. Instead, for HVAC, the turn rule places a part on a bend and the rules table determines what kind of part to place based on the type of run. This is a specification-related design rule and the associated table is located in the directory ...\intel_a\Startup\EquipmentAndSystems\Hvac\Specification.
	1.	The image below shows the turn rule design table. The "shape" and "size" columns in the table contain the input values. Only one nominal size value is input - the columns MinSize and MaxSize constitute a range, inclusive of the values in the two columns. Thus, an input of 1 inch is a match for this table, .5 inches is not. The output is in the TurnPartType column, which determines the kind of part based on the run shape. For a Round shape the diameter of the run is input; for a rectangular shape the greater of width or height is input; for a flat oval shape the greater of width or height is input.