The Truss Base Specification dialog is almost identical to the Roof Plane Specification dialog. Although truss bases are not the same as roof planes, Chief Architect handles the positioning of the two in a similar manner.
Four values define 3D orientation of a truss base: Ridge/Top Height, Baseline Height, Fascia Top Height, and Pitch. These values are related; if one is changed, the others change as well.
These values are measured from the first floor elevation of 0' 0". Baseline Height and Pitch should be set identical to those for the roof plane that surrounds the truss base.
Click the radio button to the right of a value to define it as the pivot point for the truss base and prevent it from being changed.
Changing these values does not affect the 2D representation of the truss base.
Ridge/Top - Define a new value for the highest point of the selected truss base.
Baseline - Define a new base line height.
Fascia top - Define a new height for the lowest point of the truss base. Usually, this is the same as the Baseline.
Pitch - Change the pitch for the selected truss base.
If you lock the pitch and change one of the other values, the truss base moves vertically keeping the same slope. It does not pivot.
Select the Pitch in degrees check box to display pitch in degrees rather than run-and-rise units.
Select the Up or Down check boxes to display the truss base one floor up or down from the floor it is currently on.
Rafter Depth - The truss base is a plane used by the program to place trusses, so it has no rafters. This value should be the same as that for the surrounding roof plane in order to align the truss base with it.
Vertical Rafter Depth, Top of Plate and Overhang from Baseline are shown for reference.
Click Up to display the truss base up one floor, or click Down to show it on the floor below. If no higher or lower floor exists, the option is not available.
For information about the Polyline tab, see "Polyline Tab".
For information about the Selected Line tab, see "Selected Line Tab".
For information about the Line Style tab, see "Line Specification Dialog".
For information about the Fill Style tab, see "Fill Style Tab".
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