Frame and installation system
Masonry Metal Door Frames
Heavy-duty commercial frames for masonry, concrete and block-wall openings with project-specific jamb depths and anchor systems.
Technical product guide
Masonry Frame Construction, Anchors and Specification Details
Review corner construction, throat dimensions, anchor selection and fire-rating documentation for masonry openings.
Universal Door Leaf Compatibility
Our masonry frames are precision-engineered to accommodate both steel and wood fire door leaves, providing versatile options for diverse architectural specifications.
Pair with Steel Door Leaves
Perfect for maximum security, heavy industrial settings, fire stairwells, and exterior openings. Offers seamless integration with heavy-duty steel hinge preparations and reinforces overall structural impact resistance.
Pair with Wood Door Leaves
Ideal for upscale commercial offices, hotel room entrances, healthcare facilities, and educational interiors. Delivers an elegant aesthetic finish while strictly maintaining mandatory 20, 45, 60, or 90-minute fire barrier integrity.
Frame Construction & Options
We offer two distinct corner configurations to optimize your project logistics and field assembly requirements.
Knocked-Down (KD) Corner Frames
Features precision die-cut tabs and slots for rapid, accurate field assembly. Designed to minimize ocean freight volume and maximize container loading capacity. Ideal for distribution and high-volume stocking.
Continuously Welded Corner Frames
Full-height face welding with all exposed joints ground smooth and factory-primed. Meets strict architectural specifications for heavy commercial abuse (SDI Level 3 & 4), ensuring zero joint separation.
Technical Specifications Matrix
| Technical Parameters | North American Standard Options | Engineering Details |
|---|---|---|
| Fire Codes Compliance | UL 10C / UL 10B / CAN/ULC-S104 | Certified for both US and Canadian national building codes and field fire inspections. |
| Material Quality | ASTM A653 / A653M Certified Steel | Standard A60 Galvannealed. G90 Hot-Dipped Galvanized available for high-humidity coastal zones. |
| Jamb Depth | 4-3/4", 5-3/4", 6-3/4", 7-3/4", 8-3/4" | Overall outer depth of the profile. Standard U.S. commercial wall systems matching. |
| Throat Opening | Formula: Throat Size = Jamb Depth - 1" | The net inner clearance between returns to accommodate the actual overall wall thickness. Tolerances managed within ±1/16" (1.6mm) per NAAMM/HMMA 801. |
| Frame Face | Standard 2" (50.8mm) Alternative: 4" (101.6mm) Header | Visible face profile parallel to the wall. 4" headers available for coarse masonry alignment and extra structural reinforcement. |
| Rabbet Size | Active Rabbet: 1-15/16" (49.2mm) Inactive Rabbet: 1-9/16" (39.7mm) | Precision-profiled according to SDI 111. The active rabbet perfectly fits standard 1-3/4" (44.4mm) North American fire door leaves. |
| Stop Height | Standard 5/8" (15.9mm) Height | The projecting center section acting as a positive door stop and gasket seat. Interlocks tightly under positive pressure tests. |
| Hinge Reinforcements | 7 Gauge (4.5mm) Thick Steel Plates | Pre-punched and tapped for 12-24 machine screws. High-frequency welded. |
| Strike Reinforcements | 12 Gauge Steel with Dust Cover Box | Pre-punched for ANSI A115.1 universal 4-7/8" strike. |
| Clearances | Stiles/Header: 1/8" (3.2mm) Bottom/Sill: 3/4" (19.1mm) max | Strictly adheres to NFPA 80 standard requirements for fire door assembly clearance limits. |
| Silencers Prep | Pre-punched 9/32" (7.1mm) holes 3 per strike jamb / 2 per header | Factory-punched to receive standard pneumatic rubber silencers for impact dampening. |
Specialized Masonry Anchoring Systems
To maintain strict structural and fire ratings, we provide three distinct anchoring configurations designed for North American masonry installations.
Wire Anchor (Pour-In)
0.187" (4.7mm) diameter heavy-duty steel wire loop. Placed directly into the mortar joints between concrete blocks or bricks as the wall is being built.
T-Anchor (Heavy-Duty)
Stamped galvanized steel T-shape flange. Specifically engineered to slot firmly inside Concrete Masonry Units (CMU), anchoring the frame deeply into the core.
Existing Opening Anchor
Features a factory-punched countersunk hole on the frame face with an inner pipe spacer welded inside. Designed for secure expansion bolt fastening into pre-constructed openings.
Buyer Frequently Asked Questions
Q: Do your frames comply with both US and Canadian fire regulations?
A: Yes, absolutely. Our steel frames are fully certified under UL 10C (positive pressure) and UL 10B (neutral pressure) for the US market, and CAN/ULC-S104 for the Canadian market. They are shipped with official labels accepted by local Fire Marshals and inspectors across North America.
Q: Are your throat openings and jamb depths manufactured to industry standard tolerances?
A: Yes. Our CNC manufacturing lines strictly follow the NAAMM/HMMA 801 and SDI 111 architectural specifications. Fabrication tolerances for throat openings and rabbets are tightly maintained within ±1/16" (1.6mm), ensuring perfect field fitment and lintel load distribution.
Q: Can your masonry frames be paired with wood fire doors from other local brands?
A: Yes. Our frames are manufactured strictly to standard ANSI/SDI templates. As long as the wood doors are pre-machined according to standard North American hardware templates (Hinge/Strike locations), they will pair perfectly with our steel frames without any alignment issues.
Confirm masonry opening and jamb conditions
Send opening sizes, wall construction, rating requirements and the hardware schedule for technical review.
Project RFQ Support
Submit your door schedule and project drawings
Send the opening schedule, wall conditions, rating requirements and hardware notes. Bastion Door can review the scope and prepare a practical factory-direct quotation route.
- Door and hardware schedule review for commercial projects.
- Frame type, fire rating, lockset and closer preparation checks.
- Export packing, quantity grouping and project delivery support.