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What is a 4-hour fire-rated door?

Class 125 Four-Hour Rated Vault Door

A 4-hour fire-rated door is a specialized type of door designed to resist the spread of fire and smoke for up to 4 hours. Fire-rated doors are an essential component of fire protection systems in buildings, as they help compartmentalize fire and smoke, allowing occupants more time to evacuate and limiting the spread of the fire to other areas of the building.

FIRELOCK® is the Lehigh Valley’s provider of fireproof modular vaults featuring the highest-rated fire-rated doors.

The fire-resistance rating of a door indicates the amount of time it can withstand exposure to fire and still maintain its structural integrity, preventing the fire and smoke from passing through. A 4-hour fire-rated door is one of the highest ratings available, and it signifies that the door has been rigorously tested and certified to provide protection against fire for a duration of up to 4 hours.

These doors are typically constructed using special materials and design features that enhance their fire resistance properties. They often include fire-resistant cores, intumescent seals, heavy-duty hardware, and specialized glazing materials (if the door has windows). These components work together to prevent the door from buckling, warping, and allowing flames and smoke to pass through.

4-hour fire-rated doors are commonly used in areas where fire protection is of utmost importance, such as stairwells, elevator shafts, mechanical rooms, and other critical fire-rated openings in commercial and industrial buildings. It’s important to note that the specific requirements for fire-rated doors can vary depending on local building codes and regulations.

Firelock manufacturers fire-rated doors that comply with a 1-hour, 2-hour, 4-hour, and 6-hour UL Rated Class 350 rating. Getting a quote for your project is easy—simply click here and fill out the form.

About Firelock

Since 1982, FIRELOCK® has been the world’s leading manufacturer of media-rated modular vault chambers. Unlike poured-in-place concrete vaults, FIRELOCK® vaults are constructed from individual panels, filled with a heat-resistant ceramic material, and they are lightweight, movable, and expandable. When combined with current high-density storage systems, FIRELOCK® vaults offer extremely high space efficiency at a considerable cost advantage per cubic foot of storage. The value of assets stored in FIRELOCK® vaults today reaches hundreds of billions of dollars and ranges from priceless animation cells and World Wrestling Entertainment videos to pharmaceutical research records and U.S. Department of Education student loan information.

With a FIRELOCK® vault, you invest in the highest-performing vault on the market today to ensure the protection of your most vital records and irreplaceable items. You gain the ability to store microfilm, computer media, file servers, and paper in one location, and the peace of mind that comes from knowing that all the environmental- and fire-protection elements are in place.

FIRELOCK® has been in business since 1982 and has installed over 2000 vaults around the world. Because of this broad experience, we know how to build a vault that will provide you with maximum protection today and that has the flexibility to grow with you over time.