Steel Door Frame Direct From Factory
Precision-fabricated steel door frames — dimensioned against the same master template as our door leaves, so the fit is right before it leaves our floor.
Cold-rolled SPCC construction, welded or knock-down configurations, standard and custom rough opening sizes. Sourcing frames from the same factory as your door leaf eliminates the tolerance mismatch that causes field fit problems and installer callbacks.
The Frame-to-Leaf Fit Problem —
and Why It Starts at the Factory
Most field installation problems with steel doors aren't door problems. They're frame problems — specifically, the gap inconsistency that happens when the frame and the door leaf were manufactured to different dimensional references. Installers compensate with shims, filler, and extra labor. The door looks poor. The contractor calls you. You call the supplier. Nobody wins.
We've been manufacturing steel door frames alongside our door leaves since 2008, and the single most consistent feedback we get from buyers who switch to sourcing both from us is that the installation callbacks stop. The reason is straightforward: our CNC laser cutting holds ±0.5mm dimensional tolerance on both frame and leaf components, and both are cut against the same master template. When the frame arrives on site, the leaf drops in with consistent gap geometry on all four sides — typically 3mm perimeter clearance, which is the standard commercial installation spec. There's no shimming required for a properly prepared rough opening.
This matters commercially beyond the installation quality. Contractors who source frames and leaves from different suppliers absorb the mismatch cost in labor. When you supply both as a matched set, you're selling a lower total installed cost, not just a lower unit price — and that's a differentiation argument your downstream buyers can actually use when they're comparing bids.
Get a quote for matched door and frame setsThe Mismatch Cost Chain
Frame and leaf manufactured to different dimensional references — gap inconsistency on all four sides.
Installers compensate with shims, filler, and extra labor — absorbed cost that doesn't show up in the unit price.
Poor visual result triggers contractor callbacks — your reputation, not the installer's.
Dispute chain: contractor → you → supplier. Nobody wins; everyone loses margin.
The Matched-Set Solution
Both frame and leaf CNC laser cut to ±0.5mm against the same master template.
Consistent 3mm perimeter clearance on all four sides — standard commercial installation spec, no shimming required.
You sell a lower total installed cost, not just a lower unit price — a differentiation argument your buyers can use in bid comparisons.
Steel Door Frame Specifications
Standard values for EUWOO steel door frames. Actual specifications may vary by configuration — contact us for detailed product data sheets and custom sizing.
Full Specification Table
| Parameter | Standard Value | Notes |
|---|---|---|
| Frame material | SPCC cold-rolled steel | Q235 grade, approved mill sources |
| Frame gauge | 1.5mm standard; 2.0mm heavy duty | 2.0mm for industrial and high-security applications |
| Frame profile depth | 100mm, 120mm, 140mm, 160mm | Matched to wall thickness; custom depths available |
| Frame profile width (rebate) | 40mm standard | Adjustable for door leaf thickness 40–60mm |
| Standard door sizes covered | W600–1200mm × H1800–2400mm | Custom sizes outside this range available |
| Corner construction | Welded or KD (site-assembled) | KD uses mechanical corner connectors |
| Surface finish | Powder coat, 60–80μm | 500-hour salt spray rated; 60+ RAL colors |
| Hardware prep | Hinge weld-in plates, strike box cutout, closer reinforcement | Pre-fabricated at factory to your hardware spec |
| Anchor options | Welded anchor tabs, wrap-around, slip-on | Masonry / wood stud / drywall — specified at order stage |
| Dimensional tolerance | ±0.5mm on all cut components | CNC laser cutting |
| MOQ | 50 units (standard); 100 units (custom) | Custom sizes/profiles require 100-unit MOQ |
| Lead time | 25–35 days from deposit | Custom profiles quoted individually |
Specifications shown are standard values for this product. Actual specifications may vary by configuration. Contact us for detailed product data sheets and custom sizing.
Need a custom frame specification?
Custom profile depths, non-standard rough opening sizes, OEM programs, and project-volume pricing are all available. Send us your wall thickness, door leaf spec, and target market — we'll configure the right frame.
KD vs. Welded Frame: Which Configuration Ships Better for Your Market
This is the decision most buyers need to make before placing an order. The answer depends on your distribution channel and end-use application — not on which configuration is "better."
Knock-Down (KD) Frames
New Construction StandardShips as three separate sections — two jambs and a head — with mechanical corner connectors for site assembly. The commercial case for KD is container efficiency: a 40HQ container holds significantly more KD frame sets than pre-assembled welded frames because the sections stack flat.
- Optimal for distributors supplying contractors in new construction where the rough opening is accessible from multiple sides
- Assembly takes an experienced installer 10–15 minutes per frame
- Every KD set includes a hardware bag: corner connectors, anchor bolts, and installation template — no separate hardware order needed
- Maximum container density — lower landed cost per unit for high-volume commercial construction supply
Welded Frames
Factory-Assembled & SquareArrives as a single rigid unit, factory-assembled and square. The case for welded is installation speed and dimensional certainty — the frame goes in as one piece, and the squareness is guaranteed by our assembly jig rather than by the installer's skill on site.
- Right specification for renovation and retrofit projects where the rough opening is already finished
- Squareness guaranteed by factory assembly jig — not dependent on installer skill
- Required specification for high-security applications where frame rigidity is part of the security rating
- Loads at roughly 60–70% of KD container density for standard single-door sizes — affects landed cost calculation for large-volume orders
Container Loading Trade-Off
Welded frames load at roughly 60–70% of the container density of KD frames for standard single-door sizes. For buyers doing large-volume commercial construction supply, that loading difference affects your landed cost calculation meaningfully. We can provide exact loading data for both configurations with your quote.
Frame Profiles and Wall Depth Matching
Getting the frame profile depth wrong is the second most common sourcing mistake we see — after the tolerance mismatch issue. A frame specified for a 100mm wall installed in a 140mm wall leaves a visible gap at the frame edge. It's a finish problem that requires additional trim work, which adds cost and looks like a product defect to the end user.
We manufacture frames in four standard profile depths covering the most common commercial wall constructions. For projects outside these standard depths, we fabricate custom profiles — the roll-forming tooling on our hydraulic frame line accommodates profile depth adjustments without a full tooling change, so custom depths don't carry the same lead time penalty as custom door leaf tooling.
Rebate Depth and Door Leaf Thickness
The frame profile also needs to match the door leaf thickness. Our standard rebate depth is 40mm, which accommodates door leaves from 40–50mm thickness.
For 55–60mm door leaves (common on insulated residential and acoustic doors), we adjust the rebate depth at the order stage — no additional tooling required.
Worth knowing if you're supplying a project with non-standard wall construction: ask us about the custom profile lead time before assuming it's a problem. Custom profile depths are a routine adjustment on our hydraulic frame line.
Standard Profile Depths
Four depths covering common commercial wall constructions
Hardware Pre-Fabrication: What We Build Into the Frame Before It Ships
A steel door frame is not just a steel perimeter. Hardware integration points — hinge locations, strike box, closer reinforcement, viewer prep — need to be built into the frame at the factory, not cut on site. Field-cut hardware preps in steel frames are a quality and security problem: the cuts are rarely clean, the edges aren't treated, and the structural reinforcement isn't there.
Hinge Prep
Weld-in hinge plates at specified locations — standard 3-hinge layout for commercial doors; 2-hinge for light-duty interior applications. The hinge plate is welded flush into the frame profile, not surface-mounted.
The weld-in configuration is what gives the hinge joint its load capacity. We specify the hinge plate gauge to match the door leaf gauge and the expected cycle count.
Strike Box
Mortise strike box cutout and reinforcement plate, pre-positioned to align with the door leaf lock prep. We cut and reinforce the strike location at the factory using the same dimensional reference as the lock prep on the door leaf.
This means the latch engages correctly without field adjustment — a common failure point when frames and leaves are sourced separately.
Door Closer Reinforcement
Closer mounting plates welded into the frame head and/or jamb at the specified closer location. The reinforcement plate distributes the closer load across the frame profile rather than concentrating it at the fastener points.
This is directly relevant for high-cycle commercial applications where closer fatigue is a real failure mode — not a theoretical one.
Anchor System
Frame anchor tabs or wrap-around anchors welded at specified intervals — typically 600mm centers for masonry applications. The anchor type is specified at order stage based on the wall construction.
Wall construction options: masonry, wood stud, or drywall. Each requires a different anchor configuration, and we fabricate to the spec you provide at order stage.
Ordering With Matched Hardware Preps
If you're ordering frames to match our door leaves, we pre-fabricate the hardware preps to align with the door leaf hardware prep locations as a standard practice — no additional specification required.
If you're ordering frames to match a different door leaf source, send us the door leaf hardware layout and we'll match it. The dimensional reference we use for the frame prep is derived directly from the layout you provide.
Send Your Hardware Layout
Market Segments Where Steel Door Frames Drive Repeatable Orders
Steel door frames are a repeat-order product in the right channels. These are the segments where we see consistent volume and where our fabrication capability — custom sizing, matched hardware preps, KD configuration — directly addresses the sourcing problem.
Commercial Construction Supply
50–300 sets per projectGeneral contractors and building material distributors supplying office, retail, and institutional construction projects. Frame orders typically follow door leaf orders — if you're already supplying steel doors to this segment, adding frames from the same source consolidates the order and eliminates the fit problem for your contractor customers.
Order patterns in this segment run 50–300 sets per project, with repeat orders as the contractor wins new projects.
Renovation and Retrofit Contractors
Non-standard sizes availableReplacement frame projects in existing buildings — schools, government facilities, commercial offices undergoing renovation. Welded frame configuration is the standard spec here.
This segment often requires non-standard sizes to match existing rough openings. We've had buyers in this segment send us field measurements from existing openings and we fabricate to match — a service most frame suppliers can't offer at reasonable MOQ.
Overseas Manufacturers and OEM Programs
Southeast Asia · AfricaDoor manufacturers in markets without local steel frame production capacity who source frames to pair with their own door leaves. This is a growing segment — particularly in Southeast Asia and Africa where steel door assembly operations are expanding but frame roll-forming infrastructure is limited.
We supply frames dimensioned to your door leaf spec, with your brand labeling on the packaging.
Distributor Stocking Programs
KD configuration · efficient storageDistributors who stock standard frame sizes for contractor pull-through. The KD configuration is the standard stocking spec — it stores efficiently, ships without damage, and covers the majority of standard commercial rough openings.
We recommend stocking the 100mm and 120mm profile depths as the two highest-volume sizes in most markets, with the 140mm as a secondary SKU.
Not sure which configuration fits your segment?
Tell us your market, rough opening sizes, and door leaf source. We'll confirm the right frame configuration, profile depth, and hardware prep spec for your application.
Finish, Coating, and Corrosion Performance
The frame takes the same zinc phosphate pre-treatment and automated powder coating process as our door leaves — 60–80μm film thickness, 500-hour salt spray rated.
The category page covers the full coating process in detail; the frame-specific point worth noting is edge coverage.
Frame profiles have more exposed edges than door leaves — the profile geometry creates inside corners and return edges where powder coat coverage is thinner if the application isn't controlled. We run edge coverage as a specific inspection checkpoint on frames: film thickness is measured at profile edges and inside corners, not just on flat surfaces. Frames that show thin edge coverage at these points go back to the coating line before assembly.
For coastal and high-humidity markets, the 500-hour salt spray rating covers most commercial applications. For marine or chemical exposure environments, we can supply frames in 304 stainless steel — the same material as our Stainless Steel Door — which eliminates the corrosion question entirely. Stainless frames are a niche specification but worth knowing about if you're supplying food processing or coastal hospitality projects.
Zinc Phosphate Pre-Treatment
Full pre-treatment before powder coat application — same process as door leaves, ensuring adhesion and corrosion resistance from the substrate up.
60–80μm Film Thickness
Automated powder coat line holds 60–80μm across flat surfaces. Edge coverage is measured separately at profile edges and inside corners — not just flat faces.
500-Hour Salt Spray Rating
Covers most commercial applications including coastal and high-humidity markets. Marine or chemical exposure environments can be specified in 304 stainless steel.
Color Matching Between Frame and Door Leaf
Color matching between frame and door leaf is standard when both are ordered together — they run through the same powder coat batch. If you're ordering frames to match a previously supplied door leaf batch, send us the RAL color reference and we'll match it within the standard powder coat tolerance.
Custom Frame Fabrication: Sizes, Profiles, and OEM Programs
Standard catalog frames cover W600–1200mm × H1800–2400mm in the four standard profile depths. Outside these parameters, we fabricate to your specification.
Same Line, Close Lead Times
Custom fabrication is handled on the same hydraulic roll-forming line as standard production — the line accommodates profile adjustments without full tooling changes for most custom depth and width variations.
This keeps custom frame lead times close to standard: typically 30–40 days for custom sizes versus 25–35 days for catalog sizes, depending on the complexity of the profile change and current line loading.
Build Your Private-Label Door Program
For OEM and private-label programs, we supply frames with your brand labeling on the packaging and, where required, with your part numbers stamped or labeled on the frame components.
MOQ for custom frame designs is 100 units — the same threshold as custom door leaf designs, since the powder line changeover and any profile tooling adjustment needs that volume to be cost-effective for both sides.
OEM/ODM Capabilities
If you're building a private-label door program and need frames that match your door leaf spec precisely, the development process is the same as for door leaves.
Learn more about our OEM/ODM capabilitiesCustom Frame Quote
Send us your frame spec — size, profile depth, configuration, and finish requirements — and we'll return a detailed quote with lead time.
Send us your frame specContainer Loading and Export Logistics for Steel Door Frames
Loading density, matched-set packing, and documentation that clears customs in every active market — the numbers your freight team needs before the order is placed.
KD Frame Loading Density
40HQ ContainerStandard single-door size (W900×H2100mm, 120mm profile). The three-section flat-pack format is what makes this density possible — jambs and head sections stack in reinforced cartons with corner protection on the profile ends.
Density varies by profile depth and gauge. Exact loading data provided with every quote.
Welded Frame Loading Density
40HQ ContainerSame W900×H2100mm size. Assembled frame geometry doesn't stack as efficiently — the rigid three-dimensional profile leaves unavoidable void space in the container.
For large-volume commercial construction supply, the KD vs. welded decision has a direct impact on your freight cost per unit.
Matched-Set Packing: One Carton Per Opening
When frames are ordered with door leaves, we pack them as matched sets — frame sections and door leaf in the same carton, labeled with the same batch reference.
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Frame sections and door leaf in the same carton
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Labeled with the same batch reference for traceability
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Simplifies receiving and inventory management at warehouse or job site
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One carton per opening — everything needed for installation in one package
Export Documentation Package
Complete for all active markets. Clears customs in every destination we ship to without supplementary paperwork.
Active Shipping Destinations
We've shipped frames to these markets — the documentation package clears customs in all of them without supplementary paperwork.
Landed Cost Calculation Support
We provide exact loading data with every quote so your freight team can run the landed cost calculation accurately. The KD vs. welded loading differential — roughly 300–400 vs. 180–240 sets per 40HQ — is a real number that changes your per-unit freight cost at volume. Request a quote and we'll include the container loading sheet for your specific frame configuration.
Certifications and Compliance
Third-party verified quality management, CE marking for European structural components, and market-specific standard alignment — documentation available for your import compliance files.
Quality Management System
Frames manufactured under our ISO 9001:2015 quality management system. SGS third-party audit reports are available on request for buyers who need third-party documentation for their own import compliance files.
European Market Compliance
CE marking covering structural steel door components for the European market. Applicable to buyers supplying EU construction projects where CE-marked structural components are required.
US Market Standard Alignment
For buyers supplying the US market, ANSI/SDI A250.8 covers steel door frame construction requirements. Our standard frame specifications are designed to align with these requirements.
Market-Specific Standard Documentation
If your project or import compliance requires specific test documentation, contact us and we'll confirm what's available for the frame configuration you're ordering.
Frequently Asked Questions
Specification and procurement questions answered directly — gauge selection, frame configuration, and what to specify for your application.
What is the standard steel gauge for a commercial steel door frame?
1.5mm SPCC cold-rolled steel is the standard gauge for commercial steel door frames — it provides the rigidity needed for hardware load transfer (hinges, closers, strike) without excessive weight. For high-security applications, server rooms, or industrial environments with impact risk, specify 2.0mm gauge. The 1.5mm spec handles standard commercial traffic loads and is the gauge most building codes reference when they specify "standard duty" hollow metal frames. Going below 1.5mm on a commercial frame is a false economy — the hinge and strike areas will show deformation under normal use within a few years.
KD (knock-down) vs. welded steel door frame: which should I specify?
KD frames are the right specification for new construction where the rough opening is accessible and the installer can assemble the frame in place — they ship at higher container density (lower freight cost) and are easier to handle on a busy construction site. Welded frames are the right specification for renovation and retrofit projects where the opening is already finished and you need the frame to be dimensionally guaranteed before it goes in.
The other factor is security: for high-security applications, a welded frame provides better forced-entry resistance than a KD frame because there are no mechanical joints that can be attacked. For standard commercial construction supply, KD is the volume specification.
- New construction with accessible rough openings
- Higher container density — lower freight cost
- Easier site handling on active construction sites
- Volume specification for standard commercial supply
- Renovation and retrofit — finished openings
- Dimensionally guaranteed before installation
- Better forced-entry resistance — no mechanical joints
- Correct specification for high-security applications
How do I match a steel door frame to a non-standard rough opening size?
Send us the field measurements — width, height, and wall thickness — and we fabricate to match. We need the rough opening dimensions (not the door leaf dimensions), the wall construction type (masonry, stud, drywall), and the door leaf thickness.
Our engineering team will confirm the frame profile depth and anchor configuration, and return a quote with a dimensional drawing for your approval before production.
Custom Size Parameters
Standard range: W600–1200mm × H1800–2400mm
Custom sizes outside standard range: 100-unit MOQ
Lead time for custom sizes: 30–40 days
Dimensional drawing provided for approval before production
What causes steel door frames to rack or go out of square after installation?
Three causes, in order of frequency: inadequate anchoring, incorrect wall preparation, and frame gauge too light for the application.
1. Inadequate Anchoring (most common)
Frames need to be anchored at specified intervals — typically 600mm centers for masonry — and the anchor type must match the wall construction. A masonry anchor tab in a drywall partition will pull out under door slam loads.
2. Incorrect Wall Preparation
Matters most for welded frames specifically. The rough opening needs to be plumb and square before the frame goes in, because a welded frame cannot be adjusted on site.
3. Frame Gauge Too Light
1.2mm frames in commercial applications will deflect under hinge load over time, causing the door to bind. Specify 1.5mm minimum for any commercial application.
Can I order steel door frames without ordering door leaves from EUWOO?
Yes. We supply frames as standalone products to buyers who manufacture their own door leaves or source leaves from other suppliers. If you're ordering frames to match a non-EUWOO door leaf, send us the door leaf dimensions and hardware layout — we'll fabricate the frame to match your leaf spec, including hardware prep locations.
The dimensional tolerance on our frames (±0.5mm) is tight enough to work with most door leaf sources. That said, the cleanest installation result comes from sourcing both from the same production run — the frame and leaf are dimensioned against the same master template, which is what eliminates the gap inconsistency that causes field fit problems.
What is the MOQ for steel door frames, and what does a typical order look like?
Standard catalog frames
50 units MOQ
Custom sizes and profiles
100 units MOQ
Mixed orders
Multiple frame sizes in a single container — as long as the total order meets the MOQ threshold for each SKU.
A typical first order from a new distributor is 100–200 sets of standard KD frames in one or two profile depths, often paired with a matching door leaf order. Repeat orders tend to be larger as the buyer builds their stocking program.
Related Steel Door Products
If you're building a complete door supply program, these products pair directly with our steel door frames.
Steel Door
The core catalog door leaf. Flush SPCC body, 1.0–1.2mm gauge, single and double leaf. The standard pairing with our commercial steel door frames.
View Product
Industrial Steel Door
1.5mm body, heavy-duty hinge spec, for high-cycle industrial applications. Pair with our 2.0mm gauge frame for the full heavy-duty assembly.
View Product
Interior Steel Door
Lighter-duty interior partition door. Pairs with our 100mm or 120mm profile frame for standard interior wall construction.
View Product
Residential Steel Door
Insulated core, weatherstrip, residential proportions. Frame spec for residential applications uses the 100mm profile with wrap-around anchors for wood stud construction.
View ProductGet a Quote for Steel Door Frames
Send us your rough opening dimensions, wall construction type, and target volume — our engineering team will confirm the frame configuration, provide a dimensional drawing, and return a detailed quote.
Most new buyers in this category start with a sample order of 2–4 frame sets to test the fit with their own door leaf source before committing to a full stocking order. We can ship samples within the standard lead time.
What to Include in Your Inquiry
- Rough opening dimensions (width × height)
- Wall construction type (masonry, steel stud, wood stud, concrete)
- Target order volume (sample, trial, or full stocking order)
- Frame configuration preference (KD or welded, if known)
- Finish requirement (primer, powder coat, color spec)
- Destination port and Incoterms preference
Engineering Response Includes
EUWOO — Luoyang Huahui Door Industry Co., Ltd. | Luoyang Industrial Park, Henan, China