A personnel door is one of the most frequently used components in many commercial metal buildings. Employees, contractors, maintenance crews, and visitors may use the same entrance hundreds of times throughout the life of the building.
For these applications, the door needs to provide more than basic access. It needs to withstand regular use, remain secure, resist weather, and integrate properly with the surrounding wall system.
The Butler Series 500 Steel Walk Door is designed as a commercial-grade personnel door that balances durability and cost. It features an 18-gauge galvanized steel door with a polyurethane core, a 16-gauge galvanized frame, commercial-grade locking hardware, ball-bearing hinges, and a full aluminum threshold and weather-sealing system. The door is factory assembled and designed to integrate with Butler wall systems.
Key Takeaways
- The Series 500 is a commercial-grade steel walk door for Butler metal buildings.
- It uses 18-gauge galvanized A40 steel with a polyurethane core.
- The door is designed to meet commercial Steel Door Institute standards.
- The frame uses 16-gauge galvanized A40 steel.
- The standard lock is a Falcon Grade 2 keyed-entry lever lock.
- Ball-bearing hinges feature security non-removable pins.
- A 5¾-inch aluminum threshold and weatherstripping help protect the entrance against exterior conditions.
- The door is prehung and factory assembled for easier installation.
- Grade 1 locks, mortise locks, exit devices, and automatic closers are available as options.
- The Series 500 is covered by a six-year warranty on the door leaf and frame.
- Standard and custom sizes are available for applicable applications.
What Is the Butler Series 500 Steel Walk Door?
The Series 500 is a commercial-grade steel personnel door designed for regular pedestrian access in Butler buildings.
It occupies a position between basic utility doors and heavier-duty industrial entrance systems. This makes it appropriate for many standard commercial applications where dependable performance is required without necessarily needing the highest level of industrial hardware.
The Series 500 includes:
- 18-gauge galvanized steel door
- Polyurethane core
- 16-gauge galvanized steel frame
- Falcon Grade 2 lever lock
- Ball-bearing hinges
- Aluminum threshold
- TPE door sweep
- Urethane weatherstrip
- Adjustable subjambs
- Factory-applied primer
The door and frame are designed to integrate with Butler wall systems, helping reduce the need for extensive field modifications during installation.
Why Use a Commercial Steel Walk Door?
A personnel entrance is exposed to repeated mechanical stress.
Every opening and closing cycle places loads on the:
- Hinges
- Door frame
- Lock
- Door closer
- Threshold
- Weatherstripping
In a commercial environment, these components need to withstand substantially more use than a typical residential door.
The Series 500 is designed around commercial door construction standards, making it suitable for offices, warehouses, service buildings, commercial facilities, and other applications where dependable pedestrian access is required.
Series 500 Door Construction
The Series 500 door uses 18-gauge galvanized A40 steel with a polyurethane core and square-edge construction.
The door also features a flush-mounted top channel and is designed to meet commercial Steel Door Institute standards.
Galvanized steel provides corrosion resistance while maintaining the strength needed for everyday commercial use.
The polyurethane core adds insulation to the door assembly and can help reduce heat transfer through the entrance compared with an uninsulated door.
16-Gauge Steel Frame
The frame is an equally important part of the door assembly.
The Series 500 uses a 16-gauge galvanized A40 steel frame with a 5¾-inch frame depth. The frame incorporates a 2-inch × 2-inch header and a 4-inch × 1¾-inch subframe header.
A properly constructed frame helps maintain door alignment and provides the structural support required for the hinges, locking hardware, and door leaf.
This is particularly important in metal buildings where the personnel door frame must interface correctly with the surrounding wall construction.
Series 500 Subjamb System
The Series 500 uses 16-gauge subjambs that replace the need for a conventional framed opening in the applicable installation.
The subjambs extend to approximately 7 feet 2 inches in height and can be modified to accommodate various wall conditions. Twelve-gauge adjustable clips attach the subjamb to the building girt and floor.
This system is important because the door does not operate independently from the building.
The frame, subjamb, wall panels, and structural components all need to work together to create a stable opening.
Series 500 Locking Hardware
The standard Series 500 configuration includes a Falcon Grade 2 W511-626-Dane lever lock.
The lock is through-bolted for strength and includes a free-wheeling vandal-resistant lever. The listed hardware carries a ten-year warranty.
For standard commercial applications, Grade 2 hardware can provide a practical balance between security, durability, and cost.
Facilities with higher traffic or security requirements can specify upgraded hardware.
Grade 1 Lock Options
The Series 500 can be upgraded to a Falcon Grade 1 T-511-626-Dane lever lock.
The Grade 1 option uses a heavy-duty construction and a free-wheeling vandal-resistant lever. It is also through-bolted for additional strength.
This type of upgrade may be appropriate for entrances that experience substantially more traffic or require higher-grade commercial hardware.
Mortise Lock Option
For applications requiring a different locking configuration, a heavy-duty Grade 1 mortise lever lockset is available.
The mortise configuration includes a ¾-inch latch throw and a 1-inch deadbolt throw.
Mortise hardware can be useful when the security and operating requirements of the building justify a more robust lock configuration.
Ball-Bearing Hinges
The Series 500 uses ball-bearing hinges with security non-removable pins.
The hinges support the weight of the door while allowing smooth operation.
The non-removable pins also provide additional security on exterior doors because the hinge pins cannot simply be removed from the outside when the door is closed.
Hinge condition is particularly important on heavy commercial doors. Worn hinges can eventually cause the door to sag, rub against the frame, or fail to latch correctly.
Weather Sealing
Exterior personnel doors are part of the building envelope.
Gaps around the door can allow:
- Air infiltration
- Rain
- Dust
- Outside temperatures
- Moisture
The Series 500 includes a 5¾-inch aluminum threshold, dual-finger TPE sweep, and urethane weatherstrip for a kerfless application.
These components help create a more controlled seal around the door.
However, proper installation and adjustment remain essential to achieving the intended performance.
Aluminum Threshold
The full aluminum threshold provides a transition between the door and the finished floor.
A properly installed threshold helps manage the opening at the bottom of the door while working with the door sweep and weatherstrip.
The threshold also needs to be coordinated with the surrounding floor surface.
If the floor is uneven or the threshold is improperly installed, the door may not close correctly or may develop gaps beneath the door.
Series 500 Paint Finish
The Series 500 door and frame receive a baked-on primer paint finish designed to meet ANSI A250 standards.
The finish is tested for properties including salt spray, humidity, abrasion, and adhesion.
This factory-applied finish provides the initial protective coating for the galvanized steel components.
Additional finish requirements should be evaluated based on the building’s environment and appearance requirements.
Series 500 Door Sizes
The Series 500 is available in standard configurations including:
- 3′-0″ × 7′-0″
- 4′-0″ × 7′-0″
- 6′-0″ × 7′-0″
Custom sizes are also available for applicable applications.
The correct door size should be determined from the actual building opening rather than relying solely on the nominal size of an existing door.
This is particularly important when replacing an older Butler door.
Single and Double Door Applications
The Series 500 can be used for different entrance configurations depending on the requirements of the building.
A single personnel door is generally sufficient for routine employee and visitor access.
A wider or paired entrance may be appropriate where the building requires additional clearance.
Double-door applications can be useful for:
- Equipment movement
- High-traffic areas
- Larger office entrances
- Warehouse access
- Maintenance operations
The required configuration should be established before ordering so the frame, hardware, and opening can be coordinated correctly.
Series 500 for Commercial Buildings
Commercial buildings often need personnel entrances that balance appearance, durability, and cost.
The Series 500 provides a straightforward steel entrance that can integrate into a Butler metal building without requiring an overly heavy industrial door system.
It can be appropriate for:
- Commercial warehouses
- Offices
- Service centers
- Contractor facilities
- Distribution buildings
- Manufacturing support areas
- Agricultural commercial facilities
The exact door configuration should depend on the building’s occupancy, traffic, security, and accessibility requirements.
Series 500 for Warehouses
Warehouses may have multiple entrances serving different purposes.
An employee entrance may be separate from the loading dock, allowing workers to enter without moving through vehicle and forklift traffic.
The Series 500 can serve as a dedicated personnel entrance in these situations.
Its commercial-grade construction is suited to regular daily operation while its insulated core and weather-sealing components provide additional protection at exterior openings.
Series 500 for Office Areas
A metal building can include a fully finished office section alongside warehouse or production space.
A steel personnel door can separate these areas while providing secure access between different parts of the building.
For an office entrance, considerations include:
- Door swing
- Lock type
- Hardware finish
- Accessibility
- Traffic level
- Security
- Visibility
- Proximity to other doors
For a customer-facing entrance where appearance is a higher priority, a storefront system may be more appropriate.
Series 500 vs. Series 700
Butler offers both Series 500 and Series 700 steel personnel doors.
The Series 500 is positioned as a reliable commercial-grade option, while the Series 700 is designed for heavier-duty industrial applications.
| Feature | Series 500 | Series 700 |
|---|---|---|
| Primary application | Commercial | Heavy-duty industrial |
| Door construction | 18-gauge galvanized A40 | 18-gauge galvanized A60 |
| Core | Polyurethane | Polyurethane |
| Standard lock | Falcon Grade 2 | Schlage Grade 2 |
| Frame | 16-gauge galvanized A40 | 16-gauge galvanized A60 |
| Hinges | Ball-bearing, NRP | Ball-bearing, NRP |
| Threshold | Aluminum | Aluminum |
| Higher-grade hardware | Available | Available |
| Best suited for | Standard commercial traffic | High-traffic industrial use |
The appropriate choice depends on how demanding the entrance will be.
A facility with moderate pedestrian traffic may not need the additional hardware and construction associated with the Series 700.
Common Problems With Steel Walk Doors
Door Sagging
A door that begins dragging against the threshold or floor may have worn hinges, frame movement, or alignment problems.
Difficulty Closing
If the door no longer closes smoothly, the frame may have shifted or the hinges and hardware may need adjustment.
Lock Failure
A worn or damaged lock can make the door difficult to secure.
Damaged Weatherstripping
Weatherstrip can deteriorate through age, repeated use, or environmental exposure.
Threshold Damage
Heavy foot traffic, equipment, or impact can damage or loosen the threshold.
Frame Damage
Carts, equipment, forklifts, and other objects can bend the frame and affect door operation.
Hinge Wear
Repeated opening and closing can eventually cause hinge wear.
Corrosion
Galvanized steel provides corrosion resistance, but damaged coatings and prolonged moisture exposure can eventually result in corrosion.
Signs Your Series 500 Door Needs Replacement
A replacement may be appropriate when the door has:
- A severely bent frame
- Extensive corrosion
- Persistent alignment problems
- Damaged locking hardware
- Failed weather sealing
- Broken hinges
- Structural door damage
- A deteriorated threshold
- Significant impact damage
Not every issue requires complete replacement.
Hardware, weatherstrip, locks, closers, and other components can sometimes be replaced independently.
However, when the door and frame are both substantially damaged, replacing the complete assembly may be the more practical solution.
Replacing an Existing Butler Series 500 Door
Replacing a personnel door should begin with documenting the existing installation.
Record:
- Door width
- Door height
- Rough opening
- Frame depth
- Door swing
- Hinge location
- Lock type
- Threshold
- Door closer
- Wall panel type
- Subjamb configuration
Take photographs from both sides of the door.
Close-up photographs of the hinges, lock, threshold, frame, and wall connection can also help identify the existing configuration.
Measuring a Replacement Door
One of the most common mistakes during replacement is measuring only the door leaf.
The rough opening and frame conditions are equally important.
Measure the opening at multiple points:
- Top
- Middle
- Bottom
- Left side
- Right side
Also verify the frame depth and surrounding wall construction.
If the opening is out of square, that information should be communicated before ordering.
Accurate measurements reduce the possibility of receiving a door that requires unexpected field modifications.
Series 500 Compatibility With Butler Wall Systems
The Series 500 is designed to integrate with Butler wall systems.
This compatibility is particularly valuable when replacing an existing Butler component.
A properly matched OEM door can help preserve the intended relationship between:
- Door frame
- Subjamb
- Girts
- Wall panels
- Trim
- Threshold
Instead of adapting a generic door to an existing building, an OEM replacement can be specified around the building’s original design.
Accessibility Considerations
The Series 500 door components are designed to meet applicable commercial and ADA requirements according to the product information.
However, accessibility is not determined by the door alone.
The complete entrance should be evaluated, including:
- Clear opening width
- Threshold
- Door hardware
- Operating force
- Door closer
- Approach clearance
- Adjacent floor conditions
Project-specific accessibility requirements should always be verified against the applicable codes and standards.
Automatic Closer Option
The Series 500 can be equipped with a heavy-duty Grade 1 surface-applied automatic closer.
The listed closer includes backcheck and sweep and latch-speed adjustment valves.
Automatic closers can be useful for entrances where the door needs to return to the closed position after use.
This can be particularly helpful for:
- Exterior entrances
- Security-controlled areas
- Employee entrances
- High-traffic commercial buildings
The closer should be adjusted correctly so the door closes securely without creating excessive operating force.
Exit Device Option
A heavy-duty Grade 1 rim exit device is also available for applicable Series 500 configurations.
Exit hardware can be important where emergency egress requirements apply.
The appropriate device depends on the occupancy and applicable building and fire codes.
It should not be selected solely based on traffic volume.
Series 500 Door Maintenance
Routine inspection can extend the useful life of a commercial walk door.
Check the following regularly:
- Hinges
- Lock
- Door closer
- Weatherstrip
- Sweep
- Threshold
- Frame
- Door alignment
- Fasteners
- Finish
A door that starts dragging, binding, or failing to latch should be inspected promptly.
Small alignment problems can become more expensive if the door continues operating under abnormal loads.
Things to Know
- The Series 500 is designed as a commercial-grade steel personnel door.
- The door uses 18-gauge galvanized A40 steel and a polyurethane core.
- The frame uses 16-gauge galvanized A40 steel.
- The standard lock is a Falcon Grade 2 lever lock.
- Grade 1 lever and mortise lock options are available.
- A heavy-duty Grade 1 exit device is available as an option.
- A heavy-duty Grade 1 automatic closer is also available.
- Ball-bearing hinges include security non-removable pins.
- The door includes a 5¾-inch aluminum threshold, TPE sweep, and urethane weatherstrip.
- The door and frame use a factory-applied primer finish.
- The Series 500 is covered by a six-year warranty on the door leaf and frame.
- Accurate measurements are essential when replacing an existing door.
- The surrounding Butler wall system should be identified before ordering a replacement.
Frequently Asked Questions
Q: What is the Butler Series 500 Steel Walk Door?
The Series 500 is a commercial-grade steel personnel door designed for dependable pedestrian access in Butler metal buildings.
It is intended for standard commercial applications where durability, security, weather resistance, and cost are all important considerations.
Q: Is the Series 500 door insulated?
Yes.
The door uses a polyurethane core that provides insulation within the steel door assembly.
Q: What gauge steel is used for the Series 500?
The door uses 18-gauge galvanized A40 steel, while the frame uses 16-gauge galvanized A40 steel.
Q: What lock comes standard with the Series 500?
The standard lock is a Falcon Grade 2 W511-626-Dane lever lock.
Q: Can I upgrade the Series 500 lock?
Yes.
A Grade 1 lever lock and a heavy-duty Grade 1 mortise lever lock are available as options.
Q: Does the Series 500 have weatherstripping?
Yes.
The door includes a TPE sweep and urethane weatherstrip, along with a full aluminum threshold.
Q: Can I add an automatic door closer?
Yes.
A heavy-duty Grade 1 surface-applied automatic closer is available as an option.
Q: Is an exit device available?
Yes.
A heavy-duty Grade 1 rim exit device is available for applicable configurations.
Q: Is the Series 500 compatible with Butler wall systems?
Yes.
The Series 500 is designed to integrate with Butler wall systems, making it suitable for both new construction and applicable replacement projects.
Q: What sizes are available?
The listed standard sizes include 3′-0″ × 7′-0″, 4′-0″ × 7′-0″, and 6′-0″ × 7′-0″, with custom sizes available for applicable applications.
Q: How long is the Series 500 warranty?
The Series 500 carries a six-year warranty on the door leaf and frame.
Certain hardware components have separate, longer warranties according to their individual specifications.
Q: Should I replace the entire door if the lock or weatherstrip is damaged?
Not necessarily.
Individual components such as locks, weatherstripping, hinges, thresholds, and closers may be replaceable. Complete replacement becomes more appropriate when the door or frame has substantial structural damage or deterioration.
The Bottom Line on Butler Series 500 Steel Walk Doors
The Butler Series 500 Steel Walk Door is designed for commercial buildings that need a dependable personnel entrance without necessarily requiring the heavier-duty configuration of the Series 700.
Its 18-gauge galvanized steel construction, polyurethane core, 16-gauge galvanized frame, commercial locking hardware, ball-bearing hinges, aluminum threshold, and weather-sealing components provide the combination of durability and everyday functionality expected from a commercial walk door.
For replacement projects, selecting the right door is about more than matching the nominal size. Door swing, frame dimensions, wall construction, hardware, threshold, and existing opening conditions all need to be considered.
If your Butler building has a damaged or aging personnel entrance, a properly matched Series 500 replacement can restore secure, weather-resistant access while maintaining compatibility with the building’s existing wall system.
Need a replacement Butler Series 500 Steel Walk Door? Request a Quote and provide your door dimensions, swing configuration, hardware details, and photos of the existing installation.