What are the main benefits of knock-down frames?

Cheaper and easier shipping, install after walls are finished, good for retrofits and non-standard openings.

High Strength Steel Fire Door with Reinforced Frame

Name: High Strength Steel Fire Door with Reinforced Frame
Brand: Nanchang Zhuohong Import&Export Co., Ltd
SKU: 2269970305

Jiangxi, ChinaNanchang Zhuohong Import&Export Co., Ltd

US$88.00

1-9 Sets

US$80.00

10+ Sets

Product profile

Customization

Available

After-sales Service

Online Technical Support

Warranty

2 Years

Model NO.

gz 54

Material

Steel

Style

Modern

Open Style

Swing

Sound Insulation

Screen Netting Material

Honey Paper

Veneer Wood

Customizable

Position

Entrance /Entry /Front/Garage

Security Rating

Surface Finishing

Finished

Function

Security, Decoration

Product Name

Fire Door

Keywords

Steel Fire Door

Certifications

En/BS/as/UL

Filling Material

Mineral Door Core

Fire Rated Timefire Rated Time

Ranging From 20-180 Minutes

Door Leaf Panel

1.0 mm Thickness Galvanized Steel Sheet

Door Frame Panel

1.5mm Thickness Galvanized Steel Sheet

Surface Finish

Door Leaf and Frame Powder Coated

Door Leaf Thickness

50mm,70mm

Door Frame Thickness

100mm,150mm

Opening Direction

Swing Inward / Outward

Color

Ral Color System, Could Be Customized as Well

Vision Panel

with or Without as Requsted

Louver

with or Without as Requsted

Standard Fireproof Hardware Accessories

Hinges,Door Closer,Lockset,and Bolt

Transport Package

The Product Is Encapsulated with Bubble Wrap

Specification

Standard Specifications or Customized

Trademark

ZHUOHONG

Origin

Jiangxi, China

HS Code

73080000

Production Capacity

50000 Sets/Year

Key features

Customizable Color Options: Available in RAL color system with full customization support.

Flexible Fire Rating: Fire resistance ranging from 20 to 180 minutes based on requirements.

Multiple Thickness Options: Door leaf thickness available in 45mm, 50mm, and 70mm.

Knock-Down Frame Design: Ships in separate pieces for easy transport and on-site assembly.

Reversible Door Leaf: Can be flipped on-site to change swing direction without reordering.

Customizable Vision Panel: Vision panel and louver options available with or without as requested.

Comprehensive Warranty: 2-year warranty coverage for mechanical defects and parts.

Online Technical Support: Dedicated online support team available for installation and usage guidance.

Company profile

Importers and ExportersLow MOQFast Delivery

Nanchang Zhuohong Import&Export Co., Ltd

Jiangxi, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 11 Years CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤0.82h

AI-Powered supplier vetting

SummaryNanchang Zhuohong Import&Export Co., Ltd is identified as a China-based trading company established in 2014, with 12 employees and an address in Nanchang, Jiangxi. However, the supplied descriptions also present Zhuohong Fire Equipment as a high-tech enterprise engaged in research, production, and sales of specialized doors and windows, creating some inconsistency regarding the supplier’s operating role. Evidence indicates advanced automated production equipment, a product testing center, experienced personnel, more than 20 related patents, and multiple awards. Its product range covers various fire doors, fireproof glass doors, steel doors, security doors, and fire windows. A CTI audit record is provided with a validity period from August 9, 2025 to August 8, 2026, but the audit result is recorded as 0 without interpretation. Overseas services, after-sales capability, financial credibility, and several specific innovation or customization services remain undocumented.

Supplier typeThe supplier is explicitly classified as a trading company, and its legal name includes Import&Export. The available records do not conclusively establish whether it independently manufactures products, although other descriptions characterize Zhuohong as a research, production, and sales enterprise.

R&D capabilityThe company descriptions report more than 20 related new patents, a group of experienced and highly skilled personnel, 46% highly educated technical personnel, automated production equipment, and a product testing center. These are explicit indicators of technical and product-development capability, although the supplied fields for new-product R&D, ODM, SDK, and 3D design services remain unknown.

Production capacityDescriptions identify research, production, and sales of specialized doors and windows, domestic advanced automated production equipment, and a high-quality product testing center. The audited product scope includes multiple fire-door categories, steel doors, security doors, and fire windows, supporting a broad stated production capability despite the separate trading-company classification.

Client casesThe products are reported as widely used in large commercial buildings, large residential projects, industrial and mining enterprises, and public institutions, with sales across 26 provinces and regions. The company also cites relationships or awards involving Poly, China Resources, Jinmao, and other entities, providing evidence of market applications and recognized customer or partner engagements.

Product Q&A

Q:What is a hollow metal door?

A hollow metal door (also called steel door or commercial hollow metal door) is made from cold-rolled or galvanized steel sheets formed into two face panels with a hollow core (often reinforced with honeycomb, polystyrene, polyurethane, or steel stiffeners). It's the industry standard for commercial, institutional, and industrial applications.

Q:Where are hollow metal doors typically used?

Schools, hospitals, offices, warehouses, hotels, factories, stairwells, corridors, and high-traffic/exterior openings requiring durability, security, or fire protection.

Q:What is a reversible hollow metal door leaf?

A door leaf that can be flipped on-site to change from left-hand to right-hand swing (or vice versa), no need to order specific handing.

Q:Why choose reversible hollow metal doors?

More flexible installation, fewer ordering mistakes, less inventory needed, easy to adjust on job site.

Q:What is a knock-down (KD) frame for hollow metal doors?

A frame that ships in separate pieces (head + 2 jambs) and is assembled on-site.