Here's a link to an updated dated version of the Roof Framing Geometry Plugin, version 1.5.
updated: Nov 14th 2013. I've added the function to draw the draw down roof surface to the ruby plugin.
Windows SketchUp Plugin
Apple - Mac SketchUp Plugin
Windows Plugin InstallationJust unzip it in the Google SketchUp \Plugins directory.
C:\Program Files\Google\Google SketchUp 8\Plugins
C:\Program Files\SketchUp\SketchUp 2013\Plugins
To find the plugin folder, Open the ruby console window and and paste this into the command line in the console window.
Or use the Preferences -- Install Extension while using SketchUp.
Mac location of Plugins/Users/mac/Library/Application Support/SketchUp 2013/SketchUp
Example of adding more rafters to the base drawing.
Add single rafter or crossing rafters like the Saint Andrews Cross.
Example of adding a rafter that is rotated from the ground line.
Example of adding a rafter that is rotated 90° from the ground line.
Example of adding the draw down roof surface to the drawing board.
Set the Units type mm.
45° plan angle example.
54° plan angle for pentagon.
60° plan angle for hexagon.
67.5° plan angle for octagon.
75° plan angle for dodecagon