How to use model-1. Create a furred wall around the corner that the model will be placed in. 2. Cut an opening in the furred wall. 3. Insert model at interior left corner of furred wall opening. 4. Select the TerraSpan Door and edit the component options to meet your 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.