Double Metal Door Sizes & Configurations Guide

What Is a Double Metal Door?

A double metal door is a pair of steel or metal doors mounted side by side within a single frame, designed to create a wider opening than a single door allows. Each leaf operates independently, though both are typically secured by a shared latching mechanism at the center meeting point. Standard configurations commonly use two 36-inch leaves, producing a rough opening of about 72 inches, though the actual clear width depends on frame design and swing direction.

The anatomy is straightforward: two door slabs, a coordinating frame, hinges, hardware, and optional glazing or lite kits. The slabs are usually constructed from galvanized steel sheets formed around a core—commonly honeycomb paper, polyurethane foam, or polystyrene—which adds rigidity and some insulation value. The frame is typically a formed steel channel that anchors to the wall rough opening. What separates a true double-door system from two independent single doors is the astragal, a vertical seal or interlocking strip at the meeting stile that ensures proper closure, weather sealing, and security.

Double Metal Door Sizes: Standard Dimensions and Configurations

For B2B buyers, the most practical way to approach sizing is through the leaf width and height. Here are the standard dimensions you will encounter in the North American market:

The “30 x 80 steel door” size is the most common single-leaf dimension for residential and light commercial interior applications. The “36 inch metal door” is the standard for commercial exterior entrances because it comfortably accommodates wheelchair clearance (32 inches of clear opening) and allows furniture or equipment to pass through. When you need wider access, doubling these leaves is the standard approach.

Height varies more than width. The 80-inch (6’8″) height is the default for most applications. The 84-inch (7’0″) and 96-inch (8’0″) heights are common for industrial settings, warehouse loading areas, and custom architectural entrances where ceiling height permits. If you are specifying for a facility with vehicles or large machinery, plan for at least 96-inch height to clear forklift masts and pallet loads.

One critical dimension that buyers overlook is the clear opening width—the actual space you get when the doors are fully open. A 36-inch leaf provides roughly 34 to 35 inches of clear passage because the door swings into the opening and the frame and hardware reduce the usable space. Do not assume a 36-inch door gives you 36 inches of clearance. For ADA compliance, the required clear width is typically 32 inches, which means a 36-inch leaf is the minimum you should specify.

Single vs. Double Metal Doors: Which Do You Need?

The decision between a single and double metal door comes down to three factors: required clear width, traffic pattern, and available wall space.

A single door is appropriate when the opening width is 36 to 42 inches. It is simpler, cheaper, and easier to maintain. However, once you need more than about 42 inches of clear width, a single door becomes impractical—the leaf gets too heavy for standard hinges, the hardware costs rise, and the swing radius becomes a safety concern.

Double doors make sense in these scenarios:

• Equipment and furniture movement — hospitals, schools, hotels, and industrial facilities regularly move large items through doorways.
• High pedestrian traffic — a double door allows one leaf to remain locked while the other is used for daily traffic, reducing HVAC loss and improving security control.
• Egress requirements — buildings with high occupant loads may require wider exit paths. Check your local code for the required total egress width based on occupancy.
• Architectural statement — main entrances to commercial buildings, places of worship, and upscale residential projects often use double doors for visual proportion.

The trade-off is cost and complexity. A double door system costs roughly 1.8 to 2.2 times a comparable single door, not double, because the frame, header, and installation labor do not scale linearly. You also add an astragal, which is a wear point that requires periodic adjustment.

Glass and Window Options for Metal Doors

Double metal doors can absolutely include glass panels or windows. This is one of the most common customizations in commercial applications. The options generally fall into three categories:

Full lite — a large glass panel occupying most of the door surface, typically used for storefronts, office entrances, and retail spaces. The glass is set into a metal frame within the door slab. For double doors, each leaf can have its own full lite, creating a nearly uninterrupted glass expanse when closed.

Partial lite — a vision panel, usually 12 to 24 inches wide, positioned at eye level or above. These are common in institutional buildings (schools, hospitals) where visibility into a room is desirable for safety, but privacy and security are still needed. A typical configuration is an 8″ x 42″ or 12″ x 36″ lite per leaf.

Sidelites — while not technically part of the door, sidelites are fixed glass panels flanking the door frame. They are frequently specified alongside double doors to create a grander entrance without increasing the door width beyond standard sizes.

The glass itself matters as much as the configuration. For commercial doors, tempered glass is the minimum safety requirement. For fire-rated assemblies, the glass must be fire-rated (typically ceramic or wired glass) and listed for use with the specific door and frame combination. Insulated glass units (IGUs) with two or three panes are standard for exterior applications where thermal performance matters.

The metal door with windows configuration requires deeper frames and sturdier hinges because the glass adds weight. A full-lite steel door leaf weighs more than a solid leaf of the same dimensions, and the hardware must be rated accordingly.

Where Double Metal Doors Are Used

Double metal doors are the default choice for any opening wider than 48 inches that requires durability, security, or fire resistance. The common use cases:

Commercial and institutional — office building entrances, school corridors, hospital patient rooms (especially in behavioral health where impact resistance matters), retail storefronts, and restaurant service entrances. The metal surface withstands constant use, cart traffic, and cleaning chemicals better than wood.

Industrial and warehouse — loading docks, equipment rooms, maintenance bays, and interior partitions where forklift traffic or large machinery moves through. In these settings, you will often see double doors with 84 or 96-inch heights and reinforced bottom panels to resist impact damage.

Residential — primarily for luxury homes, where double steel entry doors provide a grand entrance with better security than double wood doors. They are also used for patio and garden entrances in high-end projects, though aluminum or vinyl systems are more common for exterior residential use due to thermal performance.

Utility and mechanical rooms — double doors allow large HVAC equipment, boilers, or electrical panels to be installed and removed. A common spec is double 36-inch doors with a removable mullion (center post) so the opening can be fully cleared when needed.

Related Considerations: Arched Steel Doors, Frames, and More

Arched steel doors are a specialty configuration where the top of the door leaf follows a curved arc instead of a straight line. They are used in historical renovations, churches, and architectural projects where the opening itself is arched. An arched steel door requires a custom frame that matches the curve, and the door slab must be fabricated with the same radius. This is not a field-adjustable option—it must be manufactured to precise measurements. Expect longer lead times and higher costs than rectangular doors of similar size.

Door and frame packages — when you order a “36 steel door and frame,” you are typically getting a pre-hung unit: the door slab, hinges, and frame assembled as one unit ready to install into a rough opening. This is almost always the right way to buy for new construction. Field-assembling a door into a separately sourced frame is error-prone because frame dimensions must match the door slab within tight tolerances. A pre-hung unit from a single manufacturer eliminates the fitment risk.

Material thickness — door skin gauge matters. Commercial doors typically use 18-gauge (about 0.0478 inches) or 20-gauge steel. Heavy-duty industrial doors may use 16-gauge. Thicker steel resists denting and racking but adds weight and cost. For most commercial interiors, 20-gauge is adequate; for exterior entrances and high-abuse areas, specify 18-gauge.

Frame anchoring — the frame must be anchored to the wall structure, not just the drywall or masonry surface. For masonry walls, anchor clips or through-bolts are used. For steel stud walls, the frame is typically welded or screwed to the studs. The anchoring method affects how well the door performs under repeated use and wind loading.

Terms buyers should know

How to Choose a Reliable Metal Door Manufacturer

When you have settled on the size and configuration, the next step is finding a supplier who can deliver to specification. Here is how the industry works, and how we meet those standards.

A reliable manufacturer should be able to produce doors to the exact dimensions you need, not just stock sizes. This matters for double doors because the total width must match your rough opening precisely. A manufacturer with real production capability will confirm your measurements, advise on frame and hardware compatibility, and provide documentation for customs and shipping if you are importing.

As a factory-based manufacturer, our approach at Jusen Door and Windows is to handle the full specification from the ground up. We produce double metal doors in custom sizes, with your choice of steel gauge, glazing configuration, and hardware. Because we are the direct producer, there is no middleman markup, and we can adjust the profile structure and fittings to match the building codes of your target market.

For international buyers, we provide complete pre-shipment inspection reports covering air-tightness, water-tightness, and wind resistance. We also supply the full export documentation—packing lists, proforma invoices, and customs paperwork—and can ship either full container loads or less-than-container loads directly from our factory in China. If you are working on a construction project with bulk requirements, we support OEM and ODM orders, including private labeling.

If you are comparing manufacturers, ask for specifics: what steel gauge they use, whether the glass is tempered and how it is sealed, what the hinge rating is, and whether the frame and door are tested as an assembly. If they cannot answer these questions with numbers, that is a red flag.

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