From fb0c8a00b528e82448c5b1f1a353ff05c8cfe7cb Mon Sep 17 00:00:00 2001 From: Richard Brice <37087370+RickBrice@users.noreply.github.com> Date: Thu, 13 Nov 2025 14:42:50 -0800 Subject: [PATCH] Enhance Superelevation documentation with details Added details about positive and negative superelevation, including a reference to the IfcProfileDef coordinate system and an image illustrating the concept. --- docs/properties/s/Superelevation.md | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/docs/properties/s/Superelevation.md b/docs/properties/s/Superelevation.md index a0fad814b..f60704551 100644 --- a/docs/properties/s/Superelevation.md +++ b/docs/properties/s/Superelevation.md @@ -2,3 +2,8 @@ Superelevation ============== Specifies the superelevation as a ratio measure (slope) at the location of the event. + +Positive superelevation is used for curves to the right and negative for curves to the left. This is consistent with IfcProfileDef coordinate system (as depicted in [Figure 8.15.3.15.A](https://ifc43-docs.standards.buildingsmart.org/IFC/RELEASE/IFC4x3/HTML/lexical/IfcOpenCrossProfileDef.htm#Figure-8.15.3.15.A-Open-cross-profile) for IfcOpenCrossProfileDef). The cross section of a roadway surface with curve to the right have a favorable superelevation when the cross slope is downwards, towards the right. This would be considered a positive slope. + +image +