Product Overview
Our hollow metal doors are engineered for durability, security, and fire protection. Manufactured to HMMA 860/861/863 and SDI-100 standards, these doors are suitable for commercial, industrial, and institutional applications.
Available in multiple gauges (20, 18, 16, 14) with fire ratings from 20 minutes to 3 hours. Complete door and frame assemblies with UL and WHI certification for code-compliant installations.
Key Features
Commercial-grade hollow metal door specifications
Multiple Gauge Options
Available in 20, 18, 16, and 14 gauge steel to meet HMMA Level 1-4 requirements for different traffic and security needs.
Fire-Rated Assemblies
UL-listed fire ratings from 20 minutes to 3 hours with proper frames and hardware for code-compliant installations.
Core Options
Honeycomb, polystyrene, polyurethane, and steel-stiffened cores for thermal, acoustic, and fire performance.
Finish Versatility
Factory-applied primer, powder coat, or custom finishes with galvanized options for corrosion resistance.
Standard Compliance
Manufactured to HMMA 860/861/863 and SDI-100 standards ensuring consistent quality and performance.
Frame Systems
Complete door and frame solutions with welded, knocked-down, and drywall frame options.
Hardware Compatibility
Pre-machined for standard commercial hardware including hinges, locks, closers, and access control.
Custom Sizing
Standard sizes plus custom dimensions up to 48" wide and 108" tall for special applications.
Material Options
Material grades and gauges for every application
1 Material Grades
Cold-Rolled Steel (CRS)
Standard material for interior and protected exterior applications. Smooth surface ideal for painting.
Low
Good
Excellent
Applications: Interior doors, Protected exterior, Standard commercial
Hot-Dip Galvanized
Zinc-coated steel providing superior corrosion resistance for exterior and harsh environments.
Excellent
Fair
Good
Applications: Exterior doors, High humidity, Coastal environments
Galvanneal
Zinc-iron alloy coating providing excellent paint adhesion with corrosion protection.
Very Good
Excellent
Good
Applications: Painted exterior, Food processing, Clean environments
Stainless Steel
Premium corrosion-resistant material for demanding environments.
Superior
Good
Good
Applications: Chemical exposure, Medical facilities, Marine environments
Material Comparison
| Property | CRS | Galvanized | Galvanneal | Stainless |
|---|---|---|---|---|
| Corrosion Resistance | Low | Excellent | Very Good | Superior |
| Paint Adhesion | Good | Fair | Excellent | Good |
| Cost Index | $ | $$ | $$ | $$$$ |
| Weldability | Excellent | Good | Good | Good |
| Best Application | Interior/Protected | Exterior/Harsh | Painted Exterior | Corrosive Env. |
2 Gauge Options
| Gauge | Thickness | HMMA Level | SDI Grade | Description | Cost |
|---|---|---|---|---|---|
| 20 Gauge | 0.90mm (0.0359") | Level 1 - Standard Duty | Grade 1 | Economy option for low-traffic interior applications | $ |
| 18 Gauge ★ | 1.20mm (0.0478") | Level 2 - Heavy Duty | Grade 2 | Standard commercial grade - RECOMMENDED | $$ |
| 16 Gauge | 1.50mm (0.0598") | Level 3 - Extra Heavy | Grade 3 | Heavy-duty for high-traffic and security | $$$ |
| 14 Gauge | 1.90mm (0.0747") | Level 4 - Maximum Duty | Grade 4 | Maximum security and durability for industrial | $$$$ |
Recommended Configurations
Finish & Coating Options
Durable finishes for lasting performance and appearance
Shop Primer
DEFAULTFactory-applied rust-inhibitive primer for field painting.
Powder Coat
RECOMMENDEDFactory-applied powder coating for durability and appearance. AAMA 2603/2604 standard.
Galvanized
Hot-dip galvanizing per ASTM A123 for maximum corrosion protection.
Galvanized + Powder Coat
Combination finish for maximum protection and appearance.
Special Coatings
Anti-Microbial
Healthcare, food processing
Anti-Graffiti
Public buildings, schools
High-Durability
High-traffic areas
Chemical-Resistant
Laboratories, industrial
Color Options
Standard Colors
- RAL 9016 Traffic White
- RAL 7035 Light Gray
- RAL 7016 Anthracite Gray
- RAL 9005 Jet Black
Popular Colors
- RAL 5012 Light Blue
- RAL 6005 Moss Green
- RAL 3000 Flame Red
- RAL 1015 Light Ivory
Custom
Any RAL or custom color match available. Contact us for special colors.
| Finish Type | Durability | Corrosion | UV Resistance | Cost |
|---|---|---|---|---|
| Shop Primer | Fair | Fair | Poor | $ |
| Powder Coat | Excellent | Good | Very Good | $$ |
| Galvanized | Very Good | Excellent | N/A | $$ |
| Galv + Powder | Excellent | Excellent | Very Good | $$$ |
Technical Specifications
Comprehensive specifications for project planning
Dimensions
| Parameter | Specification |
|---|---|
| Standard Widths | 2'6", 2'8", 3'0", 3'4", 3'6", 4'0" |
| Standard Heights | 6'8", 7'0", 8'0" |
| Max Single Door | 4'0" x 9'0" (1219mm x 2743mm) |
| Max Pair Doors | 8'0" x 9'0" (2438mm total) |
| Tolerance | +0/-1/16" on height and width |
Core Type Specifications
| Core Type | Description | Fire Rating | R-Value | STC | Weight |
|---|---|---|---|---|---|
| Honeycomb | Kraft paper honeycomb for standard interior doors | 20 min max | R-2 | 27-30 | Light |
| Polystyrene | Expanded polystyrene foam for thermal performance | 20 min max | R-8 to R-10 | 30-33 | Light |
| Polyurethane | Injected foam for maximum thermal value | 45 min max | R-12 to R-15 | 33-36 | Medium |
| Steel Stiffened | Vertical steel stiffeners for fire and security | Up to 3 hours | R-1 to R-2 | 35-40 | Heavy |
| Mineral Core | High-density mineral board for fire rating | Up to 3 hours | R-4 to R-6 | 40-45 | Heavy |
Performance Specifications
Fire Ratings
- Available:20/45/60/90 min, 3 hr
- Certification:UL, WHI/Intertek
Complete labeled assembly with frame and hardware required
Acoustic
- STC Range:STC 27-45
- Honeycomb:STC 27-30
- Mineral:STC 40-45
Thermal
- U-Factor Range:0.30-0.60
- Honeycomb:U-0.60
- Polyurethane:U-0.30
Hardware Preparation
Hinge Prep
- Standard: 4-1/2" x 4-1/2" standard weight
- Heavy-Duty: 4-1/2" x 4-1/2" heavy weight
- Qty: 3 for doors ≤7'0", 4 for taller
Lock Prep
- Cylindrical: 161 prep (2-1/8" bore)
- Mortise: 86 prep
- Backset: 2-3/4" standard
Closer Prep
- Surface: Reinforced for surface closer
- Concealed: Prep for concealed closer
Manufacturing & Testing Standards
Manufacturing Standards
- • HMMA 860 - Guide Specifications
- • HMMA 861 - Selection and Usage
- • HMMA 863 - Installation Guide
- • SDI-100 - Steel Door Standards
Testing Standards
- • UL 10B - Fire Test (neutral pressure)
- • UL 10C - Fire Test (positive pressure)
- • ASTM E90 - Sound Transmission
- • ASTM C518 - Thermal Transmission
Construction & Design
Door construction details and design options
1 Construction Types
Full-Flush
Smooth, seamless face surfaces on both sides.
- • Continuous welded seams
- • No exposed fasteners
- • Clean appearance
Seamless
Single sheet face with no vertical seams.
- • Single steel sheet
- • Premium appearance
Stile and Rail
Traditional decorative panel appearance.
- • Various panel options
- • Traditional aesthetic
Edge Construction
Hardware Reinforcement
Vision Lites
Glass: Clear tempered, Wire, Fire-rated ceramic
Louvers
Types: Inverted Y, V-blade, Fusible link
Frame Systems
Complete frame solutions for every wall type
Welded Frame
Factory-welded one-piece frames for maximum strength.
- • Maximum integrity
- • No field assembly
- • Clean corners
Use: New construction, Masonry
Knocked-Down (KD)
Pre-fab components assembled on-site.
- • Easier transport
- • Fits existing openings
- • Field adjustable
Use: Renovation, Retrofit
Drywall Frame
For drywall/gypsum construction.
- • Clean transition
- • Easy installation
- • Cost-effective
Use: Office, Commercial
| Application | Standard | Heavy-Duty |
|---|---|---|
| Interior Commercial | 18 gauge | 16 gauge |
| Exterior | 16 gauge | 14 gauge |
| Fire-Rated | 16 gauge min | 14 gauge |
| High-Security | 14 gauge | 12 gauge |
Anchor Types
- Masonry: T-strap or wire anchors
- Steel Stud: Clip anchors
- Core Board: Expansion anchors
- Wood Stud: Wood screw anchors
Reinforcement
- Hinge: 14 ga / 7 ga heavy
- Strike: 16 ga / 14 ga wrap
- Closer: 14 ga / 12 ga plate
Customization Options
Configure doors to your exact project specifications
Standard Sizes
Custom Sizes
Hardware Preparation
Hinges
- • Standard: 4-1/2" x 4-1/2"
- • Heavy: 4-1/2" heavy weight
- • Continuous geared hinge
- • Qty: 3 std, 4 for tall doors
Locks
- • Cylindrical: 161 prep
- • Mortise: 86 prep
- • Exit devices available
- • Backsets: 2-3/4", 3-3/4", 5"
Access Control
- • Electric strike prep
- • Mag lock mount
- • Card reader prep
- • Electronic lock ready
Vision Lite Options
- • Standard: 6"x27", 8"x27", 10"x10", 22"x36", Full
- • Glass: Clear, Obscure, Wire, Fire-rated, Laminated
- • Fire-rated: UL listed kits required
Accessories
- • Kick plates: 6", 8", 10", 12" heights
- • Push/Pull hardware
- • Door viewers (standard/wide-angle)
- • Signage and room numbers
Applications
Metal doors for every commercial building type
Office Buildings
Professional appearance for office environments.
- • Main entries and vestibules
- • Corridor and stairwell doors
- • Mechanical/electrical rooms
Config: 18 ga, Honeycomb, Powder coat
Healthcare Facilities
Durability, hygiene, and fire safety.
- • Patient corridors
- • Stairwells and exits
- • Utility and storage areas
Config: 18 ga, Fire-rated, Antimicrobial
Educational Institutions
Heavy-duty for student traffic and abuse.
- • Classroom entries
- • Corridors and stairwells
- • Gymnasium service doors
Config: 16 ga, Steel stiffened, High-durability
Industrial Facilities
Rugged doors for manufacturing environments.
- • Production area access
- • Equipment rooms
- • Warehouse corridors
Config: 16-14 ga, Steel stiffened, Industrial
| Area Type | Typical Rating | Core Required | Special Requirements |
|---|---|---|---|
| Storage/Utility | 20 min | Any | Self-closing |
| Corridors | 20-45 min | Any | Self-closing, self-latching |
| Stairwells | 60-90 min | Steel/Mineral | Smoke seal, closer |
| Mechanical Rooms | 60-90 min | Steel/Mineral | Self-closing |
| Exit Enclosures | 90 min - 3 hr | Mineral | Positive latching, smoke seal |
Durability & Performance
Commercial-grade performance for demanding applications
Cycle Performance
Per ANSI/BHMA A156.115
Corrosion Resistance
| Gauge | HMMA Level | Impact Resistance | Application |
|---|---|---|---|
| 20 gauge | Level 1 | Light | Limited traffic areas |
| 18 gauge | Level 2 | Moderate | Standard commercial |
| 16 gauge | Level 3 | High | High-traffic, public |
| 14 gauge | Level 4 | Maximum | Schools, industrial |
Warranty Information
Product Comparison
Compare metal door configurations for your project
Commercial Grade Comparison (SDI/HMMA)
| Feature | Grade 1 | Grade 2 | Grade 3 | Grade 4 |
|---|---|---|---|---|
| Face Gauge | 20 gauge | 18 gauge | 16 gauge | 14 gauge |
| Thickness | 0.90mm | 1.20mm | 1.50mm | 1.90mm |
| Impact Resistance | Light | Moderate | High | Maximum |
| Traffic Level | Limited | Standard | Heavy | Maximum |
| Cost Index | $ | $$ | $$$ | $$$$ |
| Typical Use | Storage | Commercial | Schools/Public | Industrial |
Core Type Comparison
| Feature | Honeycomb | Polystyrene | Polyurethane | Steel | Mineral |
|---|---|---|---|---|---|
| R-Value | R-2 | R-8-10 | R-12-15 | R-1-2 | R-4-6 |
| STC Rating | 27-30 | 30-33 | 33-36 | 35-40 | 40-45 |
| Fire Rating | 20 min | 20 min | 45 min | 3 hr | 3 hr |
| Weight | Light | Light | Medium | Heavy | Heavy |
| Best For | Interior | Thermal | Energy | Fire/Security | Fire/Acoustic |
Hollow Metal vs Alternatives
| Feature | Hollow Metal | Wood | FRP | Aluminum |
|---|---|---|---|---|
| Durability | Excellent | Good | Good | Good |
| Fire Ratings | Up to 3 hr | 90 min max | 90 min max | Limited |
| Security | Excellent | Moderate | Moderate | Moderate |
| Cost | $$ | $$-$$$ | $$$ | $$$ |
Installation Guidelines
Professional installation for optimal performance
Pre-Installation Checklist
- Inspect packaging for damage
- Verify door/frame match schedule
- Check hardware prep
- Confirm rough opening dimensions
- Verify opening is plumb and level
Required Clearances
Installation Steps
Frame Installation
Set frame, plumb hinge jamb, level head, secure anchors
Door Hanging
Mount hinges, position door, insert pins, check operation
Hardware & Adjustment
Install lock, closer, adjust clearances, test all functions
Fire-Rated Installation Requirements
- • Install per NFPA 80 and manufacturer instructions
- • Use only listed hardware
- • Maintain maximum 1/8" clearances at head and jambs
- • Self-closing and self-latching devices required
- • Do not modify labeled door or frame
- • Annual inspection required per NFPA 80
Technical Support
Installation guides included with all orders. Contact our technical team for assistance:
Phone: +86 152 3616 2255
Email: technical@euwoo.com
Frequently Asked Questions
Common questions about hollow metal doors
What gauge steel should I specify for my project?
What fire ratings are available for hollow metal doors?
What is the difference between core types?
Can hollow metal doors be used for exterior applications?
What are HMMA and SDI standards?
How long do hollow metal doors last?
What finish options are available?
What is the lead time for custom doors?
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