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USA Standard Anti-Break Steel Front Entry Door Sound Insulation Metal Security Door With Multi-Point Lock
Product Description
PRODUCT HIGHLIGHTS
- Our fireproof steel door is made of galvanized anti-rust steel sheet, filled with high-density fire-resistant rock wool. It reaches 30/60/90/180 mins fire resistance rating, with tight smoke-proof sealing structure to block flame and toxic smoke spreading. Complete fire certified hardware including fire hinge, panic exit bar, fire lock and smoke seal strip optional. Suitable for hotel, school, shopping mall, office building, factory and all commercial construction fire engineering projects. Standard & custom sizes available for bulk tender orders.
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ABOUT THE SUPPLIER
Nanchang Zhuohong Fire Equipment Co., Ltd., founded in 2017 with a registered capital of RMB 58.8 million, is a leading professional manufacturer engaged in the R&D, production and sales of fire doors and fire windows. We own a modern production base of 30,000 square meters, with a monthly production capacity of up to 50,000 sets. Our productrange covers steel doors, steel fire doors, wooden doors, wooden fire doors, steel fire windows andaluminum alloy fire windows. Certified with ISO9001 and CCC, our products fully comply with Chinese GB standards,EU CE, Canadian CAN/ULC S104, American UL 10(b), UL 10(c) and NFPA 252 international fire safety norms. We offer customized engineering solutions and serve clients across the globe.
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FREQUENTLY ASKED QUESTIONS
What is a hollow metal door?
A hollow metal door (also referred to as a commercial steel door) is constructed from cold-rolled or galvanized steel sheets formed around a core structure, such as high-density rock wool, honeycomb, or polyurethane. It is the global benchmark for institutional, commercial, and industrial construction projects needing optimal durability.
Are hollow metal doors fire-rated?
Yes. Most hollow metal doors are certified to resist fire from 20 minutes up to 3 hours (180 mins) under international fire safety norms such as UL 10(b), UL 10(c), NFPA 252, and CAN/ULC S104. They typically include fire-certified hardware preps and intumescent smoke seals.
Where are hollow metal doors typically installed?
Due to their robust design and fire safety performance, they are primarily used in hotels, schools, hospitals, shopping malls, office complexes, factories, emergency exit corridors, stairwells, and perimeter security openings.
Can these doors be customized for engineering specifications?
Yes. Engineering customizations include bespoke sizes, hardware preparation (fire panic exit bars, locks, hinges), finishes (powder coating, primed steel), vision panels/lites, louvers, acoustic insulation, and reversible handings.
What is a reversible hollow metal door leaf and its benefit?
A reversible door leaf is engineered so it can be inverted during on-site installation to change between left-hand and right-hand swing. This design flexibility drastically eliminates job-site ordering errors, simplifies stocking, and accelerates field installation.
What is a knock-down (KD) frame and why is it preferred?
A knock-down frame is shipped unassembled in three components (one header and two jambs) for rapid field assembly. It significantly reduces freight volume and shipping costs, simplifies handling, and allows clean installation after drywalls and finished partitions are in place.
