Insights on Big Door Systems

As you know, post-frame building systems are ideal for constructing large buildings — and with big buildings come the need for big overhead doors. These large openings are essential for moving machinery, livestock, or equipment in and out with ease. Of course, building codes vary depending on location and environmental conditions, and these codes must be met. For instance, in hurricane-prone states like Florida, wind load-certified doors are often required. Fortunately, manufacturers such as Schweiss Doors, I-Beam Sliding Doors, Trac-Rite, and ASTA America/Janus International offer a wide range of code-compliant products.

Selecting the right door for a project can feel overwhelming given the many options available today. Let’s take a step back and explore the fundamentals and available choices to help you make informed decisions.

Matching the Door to the Application

Different applications call for different door types. Identifying the purpose of the door is the first step. For example, a light-duty commercial sheet door is often sufficient for a backyard shed. Conversely, a heavy-duty rolling steel door is better suited for securing a large, high-value equipment shed.

As building sizes increase to support commercial or industrial operations, heavier and more robust doors are required. This means using stronger frames and hardware. Using non-engineered, non-wind-rated doors puts both your business and your client’s property at risk.

Trac-Rite Enon Baptist Church — Sheet doors are ideal for applications with limited headroom. Photo courtesy of Trac-Rite Door.

Environmental Considerations

With storm systems growing in intensity, environmental resilience is a growing concern. According to the National Centers for Environmental Information, severe weather events in the U.S. have increased by about 40% since the 1980s. Additionally, a report from the Insure Our Future network notes that climate-related insurance losses have climbed from 31% to 38% over the last decade. Since the door is the only moving part of the building’s envelope and is used daily, it must be both durable and reliable.

High-quality doors and components are essential to ensuring daily performance and long-term durability — especially under extreme weather conditions.

Door System Options for Post-Frame Structures

Sliding Doors

Sliding doors, such as those offered by I-Beam Sliding Doors, are engineered for performance and durability. All their doors meet ASTM E330 wind test certifications. The company uses high-capacity, 6,000-pound trolleys that maintain their alignment and resist binding or failure over time. I-Beam doors come with a lifetime warranty — if the building stands, so does the door.

For perspective, a 16×16 commercial-grade sectional door rated for 115 mph wind typically uses 18 rollers, each weighing 350 pounds — that’s 6,300 pounds of active hardware. However, sectional door rollers are only under load about 8% of the time, while sliding door rollers carry load 100% of the time. Underbuilt trolleys can easily fail under wind pressure or wear over time.

Another benefit: sliding doors mount outside the building. When wind presses against them, they seal tighter. Adding perimeter seals enhances protection from wind, dust, and debris.

Sheet Doors

Sheet doors are made from corrugated steel and roll into a coil above the opening. Their compact design makes them ideal for applications with limited headroom, such as storage units, sheds, barns, garages, and warehouses.

There are two primary types: dead-axle and live-axle assemblies. Dead-axle doors have a stationary axle housed inside a barrel, which protects the springs and prevents the shifting issues common with live-axle doors. This results in smoother, more consistent operation.

Dead-axle assemblies are factory-greased, offering rust and corrosion resistance while reducing friction between spring coils. This design extends the door’s life and minimizes the need for ongoing maintenance.

Sheet doors also come in light-, medium-, and heavy-duty models, differentiated by the gauge and depth of the guides. While heavy-duty models offer more durability, selecting the right duty level for your specific application ensures cost-efficiency without compromising performance.

Rolling Steel Doors

Though similar in operation to sheet doors, rolling steel doors are built with interlocking slats rather than a single sheet. This slatted design provides greater strength and allows the doors to be manufactured in much larger sizes — some models are available up to 40 feet wide and 30 feet high.

A key feature of rolling steel doors is service cut-outs, which allow damaged slats to be replaced without replacing the entire curtain. This significantly lowers maintenance and repair costs.

These doors are available in a wide range of models: standard service doors, insulated versions, wind-rated and fire-rated models, counter shutters, and rolling grilles. Their space-saving design also helps optimize lighting, HVAC, and fire suppression systems.

One-Piece Hydraulic Doors

One-piece hydraulic doors are an ideal option for post-frame buildings, new or retrofitted. Hydraulic doors open to the outside of post-frame buildings, so they do not reduce headroom on the inside. Hydraulic doors are quiet, safe and open quickly via remote control. They can be constructed with a variety of insulation materials to help maintain energy efficiency in temperature-controlled post-frame buildings. Another benefit of hydraulic doors includes the ability to custom finish doors to match the building’s exterior and interior. They can also be engineered to meet mandated windload requirements.

Bifold Doors

Using bifold doors on a post-frame building allows for the design for large doors, up to 80 or 100 feet wide. Bifold doors open to the outside of the building, so they do not reduce headroom. They are available with strong and durable liftstraps to ensure safety and a door that opens quickly. Bifold doors are ideal where it snows because they lift up and out of the snow.

Sectional Doors

Sectional doors, common in residential garages, either retract vertically or arc into the interior space. While they offer good insulation (high R-values and low U-factors), they may not be ideal for industrial or commercial use due to their complex mechanics and high maintenance needs.

They also occupy a significant amount of wall and ceiling space, which can interfere with lighting, HVAC systems, and fire sprinklers. Moreover, they are constantly exposed to environmental elements, which can shorten their service life.

When selecting doors, be aware of regional building codes. For example, wind-load certified doors are often required in hurricane zones. For specifics, refer to the International Building Code published by the International Code Council.

Door Tracks: The Unsung Hero

Choosing the correct door track system is vital to ensuring smooth operation and longevity. The framing material matters — for instance, wood can warp in humid climates, which affects track alignment.

Round and square tracks each have their pros and cons. Square tracks offer a traditional aesthetic but typically have a lower weight capacity and collect debris. Round tracks, on the other hand, provide superior load distribution, self-cleaning action, and longer service life. Nylon wheels on round tracks also ensure quieter operation.

Proper installation is key. Doors must fit snugly against the building and secure on all sides to prevent wind damage. Heavy-duty hardware can make all the difference in high-wind areas.

Flat track is another option but may not suit all environments. Its open design exposes the system to elements unless it’s sheltered by a roofline or overhang.

Final Thoughts

If your approach has been to build the structure and leave the opening for someone else to close, that’s your prerogative. But remember: your name is still on the building. Even if you didn’t install the door, if it fails or looks out of place, it reflects on you.

Taking the time to specify and install a high-quality door system enhances not only the building’s functionality but also your reputation as a builder who delivers complete, well-finished projects.