The ALT BF73 bi-folding door system from ALUTECH is a premium aluminum glazing solution built for both residential and commercial use. It delivers wide panoramic openings, strong thermal performance (U-values as low as 1.2 W/m2K), and PAS24-certified burglar resistance — all in a 73mm frame profile.
At Glass Inc, we install ALT BF73 systems across metro Atlanta for homeowners looking to open up their living spaces and businesses that need flexible, high-performance door solutions. Below you will find the full technical specifications, configuration options, finish choices, and what to expect from installation.
Technical Specifications
The ALT BF73 bi-folding door system boasts impressive technical specifications that ensure optimal performance, durability, and energy efficiency. Let’s take a closer look at the key technical aspects of this system:
Maximum Dimensions and Panel Specifications
| Specification | Value |
|---|---|
| Maximum Sash Width | 6500 mm (16800 mm using inline connectors) |
| Maximum Sash Height | 3000 mm |
| Maximum Number of Panels to One Side | 7 |
| Maximum Panel Width | 1200 mm |
| Maximum Panel Height | 3000 mm |
| Maximum Panel Weight | 120 kg |
| Meeting Stile Width | 120 mm |
The ALT BF73 system allows for expansive bi-folding door configurations, with the ability to accommodate up to 7 panels folding to one side and a maximum sash width of 6500 mm. By using inline connectors, the maximum sash width can be extended to an impressive 16800 mm, offering unparalleled design flexibility for large openings.
Glazing and Thermal Performance
| Specification | Value |
|---|---|
| Maximum Glazing Thickness | 44 mm |
| Accepts Double and Triple Glazed Units | 28-44 mm thickness |
| Thermal Insulation (U-value) | 1.2 - 1.6 W/(m²K), depending on sash dimensions and glazing |
The ALT BF73 system can accommodate double and triple glazed units with thicknesses ranging from 28 to 44 mm, providing excellent thermal insulation. With U-values between 1.2 and 1.6 W/(m²K), depending on the sash dimensions and glazing configuration, this system ensures optimal energy efficiency and comfort in various climatic conditions.
Air, Water, and Acoustic Performance
| Specification | Value |
|---|---|
| Air Permeability | Class 4 |
| Water Tightness | 600 Pa |
| Acoustic Performance | 36 dB |
The ALT BF73 bi-folding doors offer exceptional performance in terms of air permeability, water tightness, and acoustic insulation. With a Class 4 rating for air permeability, 600 Pa for water tightness, and an acoustic performance of 36 dB, this system ensures a comfortable and peaceful indoor environment, even in challenging weather conditions or noisy surroundings.
Security Ratings and Profile Dimensions
| Specification | Value |
|---|---|
| Burglar Resistance | PAS24 certified, ENV 1627 RC2 |
| Frame Depth | 73 mm |
| Sash Depth | 73 mm |
Security is a top priority with the ALT BF73 system. These bi-folding doors are certified to PAS24 and ENV 1627 RC2 standards, providing excellent burglar resistance to keep your home or business safe and secure. The system features robust aluminum profiles with a frame and sash depth of 73 mm, ensuring structural stability and durability.
Opening Configurations and Fabrication Benefits
The ALT BF73 bi-folding door system offers a wide range of opening configurations and fabrication benefits, allowing for maximum design flexibility and ease of installation.
Opening Types and Maximum Number of Panels
The ALT BF73 system is available in both outward and inward opening configurations, accommodating various architectural requirements and personal preferences. The system allows for a maximum of 14 panels in total, with up to 7 panels folding in each direction. However, based on user operation, it is recommended to limit the number of panels to a maximum of 7 to one side for optimal functionality and ease of use. Additionally, the ALT BF73 system offers the option to use one door as the main leaf, allowing for convenient access without involving the other bi-folding panels.
Fabrication Benefits
The ALT BF73 system is designed with fabricators and installers in mind, offering numerous benefits that streamline the manufacturing and installation process:
| Benefit | Description |
|---|---|
| Reliability | Premium quality aluminum profiles and accessories ensure durable and comfortable system operation |
| Burglar Resistance | Equipped with burglar-resistant elements and hardware, certified to PAS24 (class D) |
| Design Flexibility | Different opening types and configurations for various applications |
| Adjustable Profiles | Allows for on-site adjustments to compensate for manufacturing errors |
| Ease of Assembly | Use of fixing elements, connectors, and plugs reduces time and simplifies the assembly process |
The system’s adjustable profiles allow for on-site adjustments, compensating for any manufacturing errors and ensuring a perfect fit. The use of fixing elements, connectors, and plugs streamlines the assembly process, reducing installation time and complexity.
Color Options and Customization
The ALT BF73 bi-folding door system offers a wide range of color options and customization possibilities, allowing you to create a unique and personalized look that complements your architectural style and interior design.
Powder Coating
| Option | Description |
|---|---|
| RAL Colors | Any RAL color (Qualicoat certified) |
| Exclusive Collections | Futura, Precis, Anodic |
| Surface Types | Glossy, matte, textured |
| Innovative Coating | Antimicrobial BIO-coating option |
The ALT BF73 system can be powder coated in any RAL color, with Qualicoat certification ensuring a high-quality, durable finish. ALUTECH also offers exclusive color collections, such as Futura, Precis, and Anodic, providing a range of trendy and sophisticated options. Various surface types, including glossy, matte, and textured finishes, allow for further customization. Additionally, the innovative antimicrobial BIO-coating option provides an extra layer of protection, ensuring a hygienic and easy-to-clean surface.
Anodizing
| Option | Description |
|---|---|
| Standard | Conformance to Qualanod standard |
| Colors | 9 standard colors |
| Surface Treatments | Chemical etching, bead blasting, brushing |
For a more natural and luxurious look, the ALT BF73 system can be anodized in accordance with the Qualanod standard. ALUTECH offers 9 standard anodized colors, with the option for different surface treatments such as chemical etching, bead blasting, and brushing, creating unique textures and visual effects.
Wood-grain Effect
| Option | Description |
|---|---|
| Standard | Conformance to Qualicoat standard |
| Options | 5 woodgrain options |
To achieve a warm and natural appearance without the maintenance requirements of real wood, the ALT BF73 system offers wood-grain effect finishes. Conforming to the Qualicoat standard, these finishes are available in 5 different wood-grain options, allowing you to create a stunning and inviting atmosphere in your living or working space.
Professional Consultation and Installation
At Glass Inc, we are proud to offer the ALT BF73 bi-folding door system as part of our comprehensive range of high-quality glazing solutions. Our team of experts is dedicated to providing professional consultation and installation services, ensuring that your project is executed flawlessly from start to finish.
Our services include:
- In-depth consultation to understand your specific requirements and preferences
- Detailed project planning and design assistance
- Precise measurements and custom fabrication
- Expert installation by our skilled and experienced technicians
- Post-installation support and maintenance services
We work closely with you throughout the entire process, providing guidance and support to help you make informed decisions and achieve the best possible results. Our commitment to quality, professionalism, and customer satisfaction ensures that your ALT BF73 bi-folding door system will exceed your expectations and transform your space in ways you never thought possible.
The ALT BF73 bi-folding door system is a cutting-edge glazing solution that combines modern aesthetics, exceptional performance, and versatile functionality. With its impressive technical specifications, diverse opening configurations, and extensive customization options, this system is the perfect choice for homeowners and businesses in Atlanta, GA, looking to enhance their living or working spaces.
At Glass Inc, we are committed to providing the highest quality products and services to our clients. Our team of experts is ready to guide you through the process of selecting, customizing, and installing the ALT BF73 bi-folding door system, ensuring a seamless and stress-free experience from concept to completion.
Why the ALT BF73 Works Well in Atlanta
Atlanta’s climate brings hot, humid summers (regular 90-degree days from June through September), mild winters, and occasional severe storms. The ALT BF73 system handles these conditions well:
- Thermal break technology keeps conditioned air inside during summer, reducing AC load
- 600 Pa water tightness rating handles heavy Georgia thunderstorms without leaking
- PAS24 burglar resistance provides security for ground-floor installations in urban neighborhoods like Midtown, Grant Park, and Virginia-Highland
- Aluminum construction resists the corrosion and warping that Atlanta’s humidity causes in wood and iron frames
For homes in Buckhead, Decatur, Roswell, and across the metro area, the BF73 offers a balance of performance and aesthetics that suits both modern builds and renovations.
FAQs About the ALT BF73 Bi-Folding Door System
What is the maximum opening width for the ALT BF73? Up to 6,500mm (about 21 feet) with standard installation, or up to 16,800mm (about 55 feet) using inline connectors for multi-bay configurations.
Does the ALT BF73 come in custom colors? Yes. The system can be powder-coated in any RAL color, anodized in 9 standard colors, or finished with wood-grain effects. Dual-color options (different inside and outside) are also available.
How energy-efficient is the ALT BF73? With U-values between 1.2 and 1.6 W/m2K depending on glazing and size, it performs well for Atlanta’s climate. Double and triple glazing options (28-44mm thickness) provide excellent insulation.
Can the ALT BF73 be used for both inward and outward opening? Yes. Both configurations are available, and the system supports up to 7 panels folding to one side or 14 panels total (7 per direction).
Does Glass Inc handle the full installation? We handle everything from consultation and measurements to custom ordering, installation, and post-installation support. Call (404) 873-6991 or request a consultation to get started.
Related Resources
- Benefits of bi-folding doors
- Energy efficiency of bi-folding doors
- Bi-folding doors for outdoor use
- Smart technology in bi-folding doors
Contact Glass Inc today to schedule a consultation and see how the ALT BF73 can transform your Atlanta space. Visit our showroom at 510 Glen Iris Dr NE, Atlanta, GA 30308 to see the system in person.