This 3D model was originally created with Sketchup 13 and then converted to all other 3D formats. Native format is .skp 3dsmax scene is 3ds Max 2016 version, rendered with Vray 3.00 These are the simplified trusses for the Big Old House. Simply save and then import into your Big Old House model. The floor edges make this easy. If it is white, make a group, if it is not already, and paint dark gray. This should match the model, if the default faces are gray. This will complete the model. You will have to import on the attic layer, or it will still be there when you turn off the attic layer. If so, just change it to the attic layer. Update: they were designed after the model was completed and do not have a geographic location, except in my imagination. :-)