Page 782 - Chief Architect Reference Manual

Chief Architect X10 Reference Manual

is rebuilt automatically. These options are • Check Trusses (no Birdsmouth) if you
only available when Build Roof Planes is wish to frame the roof using trusses rather
checked. See “Rebuilding Roofs” on page than rafters. The roof height will be set so
779. that the bottom edge of the truss top chord
• Check Retain Manually Drawn Roof is flush with the top of the wall. See
Planes to prevent manually drawn roof “Roof Trusses” on page 876.
planes from being deleted when roof • If you plan to use both trusses with raf-
planes are rebuilt. Automatic roof planes ters, leave Trusses (no Birdsmouth)
may be generated in the same location. unchecked so that the rafters’ depth can
Also available if Make Roof Baseline be accommodated. See “Mixing Trusses
Polylines is checked. with Stick Framing” on page 883.
• Check Retain Edited Automatic Roof Roof Overhang is measured
Planes to prevent automatic roof planes 3 horizontally from the outside Main
that have been manually edited - includ- Layer of exterior walls to the end of the top
ing roof planes over exploded dormers - of the rafter. It includes fascia and shadow
from being deleted when roof planes are boards but not frieze molding or gutters. See
rebuilt. Also available if Make Roof “The Main Layer” on page 383.
Baseline Polylines is checked. • Eave is the overhang distance outside of
If a newly generated roof plane is copla- bearing walls for roof planes using the
nar with a retained plane, and the area default Pitch. If a particular roof plane has
where they overlap is at least half the area a different Pitch, its overhang will adjust
of either of them, the new roof plane is to keep its fascia at the same height. Over-
deleted and only the retained plane is hang may be greater for a shallower pitch,
kept.
lesser for a greater pitch.
• Gable is the overhang distance at gable
Note: Under some conditions, new roof ends or rake walls.
planes may be generated in the same loca-
tion as manually drawn or automatic roof
planes that have been retained. If the roof overhang values are not suffi-
cient to extend past the outer surface of
• Check Use Existing Roof Baselines to exterior walls, the walls may not generate
produce a roof plan based on your Roof correctly in 3D views.
Baseline Polyline(s) instead of the exte-
rior wall layout. 4 The Roof Height options affect the
heights of roof planes.
2 The Specifications options are basic
roof structure settings. Specify the amount to Raise/Lower From
Ceiling Height, which controls the height of
• Enter a value to describe the Pitch as a roof planes relative to the ceiling height
ratio over 12. For a conversion to degrees, specified for the rooms below.
see “Roof Pitches in Degrees” on page
833.

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