refrigerated transportation best practices guide 5 5.5. loading the trailer 19 5.6. trailer loading best practices 21 5.7. airflow 22 5.8. refrigeration unit operating procedures – post-loading 25 5.9. trailer post-load verification and inspection 25 5.10. securing the loaded trailers for staging 25 staging loaded trailer back on to the yard 25 6.1. monitoring of staged trailers 26