How to use model-1. Create a furred wall around the corner that the model will be placed in. 2. Cut a opening that will eliminate the corner of the building. 3. Insert 90 degree model, rotate, and then place in opening. 4. Select the TerraSpan Door and edit the component options to meet you needs 5. Use the push/pull command to bring rough opening to proper size around door frame. 6. Delete portion of floor that covers door sill. 7. Interact and have fun. Models were assisted by www.parametricxinc.com.