Roof Slope; Roof Slope Arrow - Autodesk 24000-000000-9860 - Revit Architecture - PC User Manual

Roof Slope

You can define different slopes and overhangs for the roof; Revit Architecture warns you if it cannot create
the roof geometry based on the specified values for slope and overhang.
You can specify a selected footprint line to be slope-defining:
Click
On the Options Bar, select Defines Slope.
To specify the slope of a slope-defining line, select the line. A numeric control displays with the line. This
is the slope value. Enter a value for the slope.
You can then change the height and the angle of the roof. If you do not define any of the lines as
slope-defining, the roof is flat. If you define one side of the roof as sloping, the result is a shed roof. If you
define 2 lines on opposite sides, the result is a gable roof. If you define slope lines on 4 sides, the result is a
hip roof.
Lines that are not specified as slope-defining are considered trimming lines. By extruding these lines vertically,
you can trim the surface of the roof.

Roof Slope Arrow

Use the Slope Arrow command to create complex footprint roofs by defining slopes that cannot be created
from setting footprint boundary lines as slope-defining. For example, to create a flat sloping roof when no
footprint boundary lines are specified as slope-defining lines, sketch a slope arrow from the corners of the
roof sketch.
The Slope Arrow command appears on the Sketch tab of the Design Bar when you are sketching a roof.
What is the Slope Arrow?
A slope arrow is an alternative way to define the slope of a roof, floor, or ceiling plane, using a line in the
direction of the slope. You can specify the height at the head of the slope arrow and either the height at the
tail or a slope value (rise over run) using the properties of the slope arrow. The tail of the slope arrow must
be on one of the sketched lines that defines the boundary. The sketched line containing the tail cannot be
slope-defining, unless the slope arrow is at a vertex, because that would specify conflicting slopes for the
same segment.
Use the slope arrow when you know the height at the top and bottom of the roof plane, rather than the
slope. For example, slope arrows can be used to adjust a flat roof to satisfy a particular height at a drainage
point. Another good example is creating a hip on gable roof.
NOTE The slope arrow tail cannot start from a slope-defining boundary line.
Proper sketch for creating hip on gable roof with slope arrow
616 | Chapter 11 Working with Architectural Components
. In the Element Properties dialog, set specify Yes for Defines Roof Slope.