Question: I have door that comes with a 3 hour fire rating. My opening only calls for a 90 minute. Is it okay going over the door's needed fire rating time and can I still use this door?   Answer: You most certainly can. As long as the door is equal too or above, you can use that door. If necessary, we can label your door, depending on the required fire rating, for 45 minutes, 90 minutes, or 3 hours. We also can label you frame, if required and it meets code, for 45 minutes, 90 minutes, or 3 hours.   In addition to a broad offering of product and service solutions, IDN offers pre-sale and post-sale technical support.  The benefit to you is that we make security simple.  Whether your task is related to high-security systems, electronic access control, door installation, or other, our experts are here to assist.  Just let us know how we can help.  Do you have a question, or need a quote? Contact your local IDN Branch, or ask the Door Guy through our website. © Copyright IDN, Inc.