We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What are Some Different Types of Fire Doors?

By Adam Hill
Updated May 16, 2024
Our promise to you
HomeQuestionsAnswered is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At HomeQuestionsAnswered, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Fire doors are a type of door used to contain a fire in a certain part of a building. They form part of a passive fire protection system. The walls around fire doors are also often made to be fire-resistant. Fire doors and walls have hourly ratings, which express the time that they are able to stand up to fire in test conditions.

There are several materials which these doors can be made out of. These materials are not all fireproof, but rather are meant to delay the fire from spreading for as long as possible. Some doors are made of timber, others of steel, and still others are partly composed of natural minerals. The door frame is most often also fire-resistant, featuring strong construction and seals to stop the passage of smoke. The door hardware must also tested and found suitable for use on a fire door. The door, frame, and hardware together form a "doorset," which carries a given fire rating.

Fire ratings are assigned based on how long the door or doorset is able to withstand direct exposure to fire. Hourly ratings include three hours, 1.5 hours, one hour, 3/4 -hour, and 1/3- hour. A three hour fire door would be most commonly used in a wall that separates two buildings or two parts of a large building. The wall around the door in this case would be rated for an even longer time, such as four hours. 90-minute or 1.5-hour doors are commonly found in stairwells such as those in apartment buildings.

Generally, the smaller the areas that a door divides, the lower the fire rating of the door. Fire doors with ratings under 1.5 hours are used to divide occupancy areas of a building, with 1/3-hour or 20-minute doors being used mainly for smoke control in corridors and other interior areas. Many fire doors have internal windows which are also fire-rated. The window is there to allow a person to judge whether the door may safely be passed through in a fire. Wire mesh glass is common for use in these windows, as well as ceramic glass.

Fire doors are sometimes unable to provide the protection they were meant to, most often due to incorrect operation. Doorstops should never be placed to hold a fire door open, as this would render it useless in an emergency. Most fire doors are meant to be closed at all time, however some are held open by devices which release them during a fire to close on their own. Doors must be certified by a testing laboratory and bear the laboratory’s label, in order to be used as fire doors, according to federal regulations.

HomeQuestionsAnswered is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Related Articles

Discussion Comments

HomeQuestionsAnswered, in your inbox

Our latest articles, guides, and more, delivered daily.

HomeQuestionsAnswered, in your inbox

Our latest articles, guides, and more, delivered daily.