Reinforced Security
Door Frames
1.5–2.0mm cold-rolled steel, adjustable 90–160mm depth, anchor configurations for masonry and steel stud. Sold as a matched set with our door leaves or as a standalone component for buyers fitting existing openings.
Factory-direct from Luoyang, China · 100% pre-shipment inspection · MOQ 50 units
Why the Frame Is the Failure Point
Most Buyers Overlook
A 1.5mm door body in a 1.0mm frame is security theater. Under forced entry, the frame fails before the door leaf does.
Under forced entry, the frame fails before the door leaf does — the anchor points pull out of the wall, the jamb deforms, and the door swings open regardless of how good the lock is. We see the evidence in replacement orders: buyers who sourced doors from one supplier and frames from another, or who accepted whatever frame came bundled with a low-cost door package, and ended up with field failures that cost more to remediate than the original sourcing savings.
The frame is a structural component, not a trim piece. It carries the full load of the door leaf, transfers hinge forces into the wall, and provides the strike plate backing that the lock bolt bears against under attack.
Every one of those functions depends on gauge, weld quality, and anchor configuration — not on how the frame looks in a product photo.
We manufacture our security door frames in-house on the same production floor as our door leaves, from the same SPCC cold-rolled steel coil stock. When you source a matched door-and-frame set from us, the fit is tested before packing — every door is assembled against its frame at final inspection. That's not a marketing claim; it's a production step that eliminates the most common installation problem: frames and leaves from different manufacturing runs that don't fit cleanly together.
From the field: The frame-fit problem is more common than buyers expect. We've had distributors come to us specifically because they were tired of fielding installer complaints about doors that required shimming or adjustment on every opening — the root cause was always dimensional inconsistency between the door and frame source.
Full weight transferred through hinge points into the jamb
Dynamic loads during forced entry concentrate at hinge anchors
Lock bolt resistance depends entirely on frame gauge behind the strike
Frame Construction: What the Spec Actually Means
Gauge, profile tolerance, anchor pattern, and depth adjustment — each spec has a direct consequence for installation outcome and security performance.
Steel Gauge and Profile
Our standard security door frames run 1.5mm cold-rolled SPCC steel on the jamb and head sections. For heavy-duty and institutional applications — government buildings, correctional facilities, high-security commercial — we supply 2.0mm gauge frames.
The gauge difference matters structurally: a 2.0mm frame has roughly 33% more cross-sectional resistance to deformation under lateral load than a 1.5mm frame, which is the load direction that matters during a forced-entry attempt.
The frame profile is roll-formed on our hydraulic door frame roll-forming line, which gives consistent cross-section geometry across the full length of each jamb. Inconsistent profile geometry — a common defect on frames made with worn tooling — causes the door leaf to bind or gap unevenly around the perimeter.
Our roll-forming tooling is maintained to ±0.3mm profile tolerance — tighter than the ±0.5mm we hold on door panels. Frames are harder to shim in the field than door leaves are to adjust, so we hold the tighter spec on the component that's harder to fix.
Anchor Configuration
Three anchor points per jamb is our standard — six total for a single-leaf door. For heavy-duty configurations and doors over 2100mm height, we go to four per jamb. The anchor bolt pattern is designed for masonry installation: 12mm through-bolt holes at specified centers, with a steel anchor plate welded to the back of the jamb to distribute the load across the wall face rather than concentrating it at the bolt hole.
For steel stud framing — common in North American commercial construction — we supply clip-angle kits that attach to the stud flanges. The clip angles are pre-drilled and supplied with the frame; your installer doesn't need to field-fabricate any attachment hardware.
We've shipped enough frames to North American contractors to know that the clip-angle detail is what separates a clean installation from a half-day of improvisation on site.
- 12mm through-bolt holes
- Welded anchor plate backing
- Load distributed across wall face
- 3 points/jamb standard
- Pre-drilled clip-angle kits
- Attaches to stud flanges
- Supplied with frame
- No field fabrication needed
Depth Adjustment
Frame depth is adjustable from 90mm to 160mm to accommodate different wall thicknesses. The adjustment is built into the frame profile — the jamb section telescopes and locks at the required depth before installation, rather than requiring field cutting or shimming.
Standard wall thicknesses in our main export markets run 100–120mm (masonry) and 90–140mm (steel stud with drywall), so the 90–160mm range covers the full spread without custom fabrication.
Non-standard wall thickness?
If your project has a wall thickness outside the 90–160mm range — thick masonry, double-wythe brick, or insulated cavity walls — we can fabricate custom-depth frames. Minimum order for custom depth is 50 units. Send us the wall section drawing and we'll confirm the frame profile.
Technical Specifications
Standard values for this product. Actual specifications may vary by configuration. Contact us for detailed product data sheets and custom requirements.
| Parameter | Standard | Heavy-Duty |
|---|---|---|
| Frame Material | Cold-rolled SPCC steel | Cold-rolled SPCC steel |
| Jamb Gauge | 1.5mm | 2.0mm |
| Head Gauge | 1.5mm | 2.0mm |
| Frame Depth (adjustable) | 90–160mm | 90–160mm |
| Standard Door Sizes Fitted | 800×2000, 900×2000, 960×2100, 1000×2100mm | Same + custom |
| Anchor Points per Jamb | 3 (standard) | 4 (doors >2100mm) |
| Anchor Bolt Diameter | 12mm | 12mm |
| Surface Treatment | Zinc phosphate pre-treatment + electrostatic powder coat | Same |
| Powder Coat Thickness | 60–80μm | 60–80μm |
| Salt Spray Rating | 500 hours | 500 hours |
| Color Options | 60+ standard RAL colors | Same |
| Installation Type | Masonry (anchor bolt) / Steel stud (clip-angle kit) | Same |
| Certifications | ISO 9001:2015 CE SGS | ISO 9001:2015 CE SGS |
| MOQ (standard) | 50 units | 50 units |
| MOQ (custom depth/size) | 50 units | 50 units |
Specifications shown are standard values for this product. Actual specifications may vary by configuration. Contact us for detailed product data sheets and custom requirements.
Matched Set vs. Standalone Frame: Which Sourcing Model Fits Your Business
Matched Door-and-Frame Set
Most of our frame volume ships as part of a matched door-and-frame set. The commercial logic is straightforward: the fit is guaranteed, the finish is consistent batch to batch, and your installer gets a single package with everything needed for the opening.
For distributors building a catalog, a matched set simplifies your SKU structure — one line item per opening instead of two.
- Guaranteed fit — frame rebate and door leaf matched at production
- Consistent finish batch to batch
- Single package per opening — simplified installer logistics
- Cleaner SKU structure for distributors — one line item per opening
Standalone Frame Supply
The standalone frame option exists for buyers in two situations. We can supply frames to a specified door leaf dimension — send us the door leaf size and we'll confirm the frame spec.
Situation 1
Contractors or distributors with existing door leaf inventory — their own brand, a previous supplier's product, or doors already on a project site — who need frames that fit a specific rough opening.
Situation 2
Renovation and replacement projects where the existing door leaf is serviceable but the original frame has failed or corroded. Frame-only replacement is a real market segment, particularly in coastal and high-humidity regions where frame corrosion is the first failure mode.
Confirming Fit for Standalone Frame Orders
For standalone frame orders, we recommend sending us a sample of the door leaf or at minimum the exact door leaf dimensions — width, height, and leaf thickness — so we can confirm the frame rebate depth and stop profile match.
A frame that's 2mm too tight on the rebate causes the same installation problem as a frame that's 2mm too loose, and it's easier to confirm the fit before production than to sort it out on a job site.
Where Reinforced Security Door Frames Move: Market Segments and Order Patterns
Understanding which segment drives your volume determines which frame spec to stock, what documentation to prepare, and how to structure your inventory for predictable reorder cycles.
Residential Construction
Developers sourcing for apartment blocks typically standardize on one or two door configurations per project — 900×2000mm or 960×2100mm are the most common in our export markets — and order in quantities of 200–500 sets per phase.
Commercial Office & Retail Fit-Out
Drives demand for frames with access control prep — conduit runs, junction boxes for electric strike or magnetic lock mounting. Projects typically run 50–200 openings. The frame is often the component that determines whether the access control system installs cleanly or requires field modification.
Institutional & Government Construction
Schools, hospitals, government offices, correctional facilities. Procurement cycles are longer and often require third-party certification documentation, but order sizes are large (200–1,000 openings per project) and the spec is locked once approved.
Renovation & Replacement
Easy to underestimate. Frames fail before door leaves in most environments — corrosion at the base of the jamb, anchor pull-out from repeated slamming, or deformation from a forced-entry attempt. A distributor who can supply replacement frames to fit common door leaf sizes has a recurring revenue stream that doesn't depend on new construction activity.
Institutional Segment: Middle East & Southeast Asia
The institutional and government segment has grown for us in the Middle East and Southeast Asia over the past three years. If you serve those markets, having the heavy-duty 2.0mm frame in your catalog is a prerequisite for bidding government contractor and institutional procurement projects. Worth building inventory depth if those regions are part of your distribution footprint.
Frame Finish and Corrosion Resistance: What the Process Delivers
The finish on a security door frame takes more abuse than the door leaf finish does. The base of the jamb sits at floor level, exposed to cleaning chemicals, moisture, and physical impact. The anchor area behind the wall face is in a damp cavity. The stop face gets contact every time the door closes.
The Finish Process, Step by Step
Zinc Phosphate Pre-Treatment
The same process used on door leaves. Switched from iron phosphate in 2020. Zinc phosphate gives better corrosion resistance at the substrate level, particularly at weld seams and cut edges where bare steel is exposed — the highest-risk points on any fabricated frame.
Automated Electrostatic Powder Coating
Same automated line as door leaves. 60–80μm film thickness, convection cure. Consistent application across the full frame profile including internal corners and anchor zones.
500-Hour Salt Spray Rating
The threshold most buyers need to avoid finish warranty claims from downstream customers. Verified through standard salt spray testing. The zinc phosphate pre-treatment is what makes this rating achievable and sustainable in field conditions.
A frame with only iron phosphate pre-treatment typically shows corrosion at the base within 18–24 months in coastal and high-humidity conditions. Zinc phosphate pre-treatment is what separates a 3-year field-proven finish from one that generates warranty claims in year two. Ask your current supplier which pre-treatment process they use.
Coastal & High-Humidity Markets
Southeast Asia, the Gulf coast, parts of Africa. The 500-hour salt spray rating is the threshold most buyers in these markets need. Distributors in Singapore and Dubai have run our frames for three-plus years in those environments without finish failures.
Color Matching: Matched Set Orders
When frames and leaves are ordered as a matched set, we batch them through coating together to eliminate any batch-to-batch color variation. This is the only reliable way to guarantee a consistent finish across the full opening.
Standalone Frame Color Orders
If ordering frames separately from door leaves, specify the RAL color and we'll match to the same powder formulation. Batch-to-batch variation is possible when orders are separated across production runs — specify RAL precisely to minimize risk.
The Pre-Treatment Question to Ask Any Frame Supplier
Iron phosphate pre-treatment is cheaper and faster. It's also why frames from lower-cost suppliers show base corrosion within 18–24 months in humid environments. If your downstream customers are in coastal or high-humidity markets, the pre-treatment process — not the powder coat color or thickness — is the specification that determines whether you get warranty claims in year two. Confirm zinc phosphate pre-treatment before you commit to a supplier.
Installation Requirements and What to Specify Before You Order
Getting the frame spec right before production is faster and cheaper than field modification. Here's what we need from you, and what you need to know before the frame goes in the wall.
Rough Opening Dimensions
Masonry installation requires frame width + 20–30mm on each side for anchor bolt clearance and leveling. Steel stud requires frame width + 10–15mm — tighter tolerance because stud spacing is fixed. Installation templates are supplied with every frame order.
Wall Construction Type
Masonry (concrete block, brick, poured concrete) or steel stud with drywall — the anchor configuration differs for each. If you're unsure, send a photo of the rough opening. We can confirm the right anchor spec from a photo.
Wall Thickness
Frame depth must match wall thickness so the frame face sits flush with the finished wall surface on both sides. Standard adjustable range covers 90–160mm. If your wall falls outside that range, specify before production — not after.
Door Swing Direction
Left-hand or right-hand swing, and whether the door swings in or out relative to the secure side. Hinge cutouts and strike plate position are set at production. This cannot be adjusted in the field without significant rework.
Access Control Prep
If the opening will have an electric strike, magnetic lock, or access control reader, specify this before production. We pre-install conduit runs and junction boxes at the factory.
Important: Field drilling into a finished frame to add conduit runs is messy and risks compromising the frame's structural integrity at the anchor zone. Specify access control prep at order time — not during installation.
Installation Template Included
Every frame order ships with a paper installation template. Your installer tapes it to the rough opening to mark anchor bolt positions before drilling — no measuring from scratch on site.
Specification Checklist
Rough opening width × height (mm)
Include clearance allowance per wall type
Wall construction type
Masonry or steel stud — photo accepted if unsure
Wall thickness (mm)
Standard range 90–160mm; flag if outside
Door swing: LH or RH, in or out
Set at production — not field-adjustable
Access control hardware (if any)
Electric strike, mag lock, reader — specify before production
Customization Options and Limitations
Most project requirements fall within our standard production range. Here's what can be configured, what requires engineering review, and the MOQ thresholds that apply.
What Can Be Customized
Frame depth beyond 90–160mm standard range
Custom fabrication — 50-unit minimum
Non-standard door leaf sizes
Any dimension within roll-forming capability: up to ~1200mm width, 2400mm height
Gauge upgrade to 2.0mm
Available on any configuration, not just heavy-duty
Custom RAL color or catalog color matching
Match to existing product in your catalog
Access control prep
Electric strike cutout, magnetic lock mounting plate, conduit runs, junction boxes
Vision panel cutout in head section
For sidelite configurations
Custom anchor bolt patterns
For non-standard wall construction
Requires Engineering Review
Frame profiles outside roll-forming tooling range
Very wide or very narrow profiles may require new tooling. We'll tell you upfront if this applies — no surprises.
Structural modifications affecting the anchor zone
Any change to anchor zone geometry requires our engineering team to confirm the load path isn't compromised.
Engineering review is not a blocker — it's a confirmation step. Most requests clear review without modification. We flag it upfront so you're not surprised by lead time.
MOQ by Customization Type
| Customization Type | MOQ | Notes |
|---|---|---|
| Color changes, standard size variations | 50 units | Custom RAL, catalog color match |
| Custom profiles, non-standard depths | 100 units | Configurations requiring tooling changes |
| OEM / private-label program | 50–100 units | Your brand on frame label and carton; same MOQ as configuration type |
Free Design Consultation and 3D Rendering
For custom configurations, send us your spec. Our engineering team reviews it for manufacturability and returns a rendering and quote — typically within 5–7 working days.
- Manufacturability review at no charge
- 3D rendering included with quote
- Engineering feedback on anchor zone and load path
- Tooling cost disclosed upfront if new tooling is required
Packaging, Container Loading, and Landed Cost
Frames ship in KD (knock-down) format as part of a matched door set, or bundled separately for standalone frame orders. Frame sections — two jambs and one head — are bundled in sets, wrapped in stretch film, and packed in reinforced corrugated cartons with foam corner protection on the profile ends.
The profile ends are the most vulnerable point during port handling. The foam protection was added after edge damage appeared on early export shipments — before it became a recurring claim.
Matched Door-and-Frame Sets (40HQ)
900×2000mm standard configuration
Approximately 200–250 sets per 40HQ
960×2100mm configuration
Approximately 180–220 sets per 40HQ
Heavy-duty 2.0mm frame configurations
Load at the lower end of these ranges due to additional weight per set
Standalone Frame Bundles (40HQ)
Standard 1.5mm frames for 900×2000mm openings
Approximately 350–400 frame sets per 40HQ — frames nest more efficiently than assembled door sets
Landed cost advantage
The higher loading density on standalone frames is a meaningful landed cost advantage for buyers sourcing frames separately from door leaves
Batch Traceability
Every carton carries a barcode linked to our production batch record. If there's a quality question on arrival, you can trace the unit back to its production date, line, and inspection record.
Documentation Package
Complete for customs clearance in all active markets: North America, EU, Gulf, Southeast Asia, Africa, Australia.
Lead Times
25–35 days for standard configurations from deposit confirmation. Custom depth or profile configurations are quoted individually based on engineering complexity.
Buyer FAQs: Security Door Frame Sourcing
Direct answers to the specification and sourcing questions that come up most often from importers, distributors, and project buyers.
What gauge steel should I specify for a security door frame?
For standard residential and light commercial applications, 1.5mm cold-rolled SPCC is the right spec — it provides adequate resistance to forced entry and keeps freight cost reasonable. For institutional, government, and high-security commercial applications, specify 2.0mm.
The practical test:
If the door is a primary perimeter barrier (main entrance, perimeter access point), use 2.0mm. If it's an interior application where the door is a secondary barrier, 1.5mm is sufficient. Don't over-spec for interior applications — the weight and freight cost difference adds up across a large project.
Can I source frames to fit door leaves from another manufacturer?
Yes, but send us the exact door leaf dimensions — width, height, and leaf thickness — before we produce. The frame rebate depth and stop profile need to match the door leaf thickness, and the frame width needs to match the door leaf width with the correct clearance gap (typically 3–4mm per side).
We've supplied frames to fit third-party door leaves before; it works cleanly when the dimensions are confirmed upfront. It doesn't work when the buyer assumes standard dimensions and the actual door leaf turns out to be non-standard.
What is the difference between a security door frame and a standard door frame?
Gauge and anchor design. A standard interior door frame is typically 0.8–1.0mm steel or wood, designed to carry the weight of the door leaf and provide a finished appearance.
A security door frame is 1.5–2.0mm steel, designed to resist lateral forced-entry loads, with a minimum of three anchor points per jamb that transfer those loads into the wall structure. The anchor bolt pattern and the gauge are what make it a security frame — the profile may look similar, but the structural performance is fundamentally different.
How do I specify the correct frame depth for my wall thickness?
Measure the wall thickness at the rough opening — from finished surface to finished surface, including any drywall or plaster on both sides. The frame depth should match that measurement so the frame face sits flush on both sides.
Our standard adjustable range covers 90–160mm, which handles most masonry and steel stud wall constructions. If your wall is outside that range, contact us with the wall section drawing and we'll fabricate a custom depth frame.
Do you supply installation hardware and templates with the frame?
Yes. Every frame order ships with anchor bolts (for masonry configurations), clip-angle kits (for steel stud configurations), and a paper installation template that marks anchor bolt positions for the rough opening.
The template eliminates the need for your installer to measure and mark anchor positions from scratch — they tape it to the opening, drill through the marked positions, and the anchor pattern is correct. For access control prep configurations, we also supply the conduit and junction box hardware pre-installed in the frame.
What is the MOQ for security door frames?
50 units for standard configurations (standard gauge, standard depth range, standard RAL colors). 100 units for custom configurations — non-standard depth, custom profiles, or configurations requiring tooling changes. For OEM/private-label programs, the same MOQ applies.
Below 50 units, the production setup cost makes the per-unit price uncompetitive. We'll tell you that directly if your volume is below threshold rather than quote a number that doesn't make sense.
Source Security Door Frames Direct from the Manufacturer
We manufacture security door frames in-house — same facility, same steel, same quality system as our door leaves. If you're evaluating frame suppliers, the fastest way to assess fit is to send us your current sourcing spec.
What to Send Us
Our engineering team will review your spec and come back with a frame spec recommendation, a detailed quote, and a 3D rendering if the configuration is non-standard.
- Door leaf size
- Wall construction type
- Wall thickness
- Target volume
Most buyers in this category start with a sample order of 2–5 sets to verify fit against their door leaf and confirm the finish quality before committing to a container. We can ship samples on standard lead times.