Together with W20 profiles, Ottostumm W40 is the only one on the market to use the original hot-rolling production technique, introduced at the end of the 19th Century.

Ottostumm W40 comes in a complete range of thick steel profiles, guaranteeing utmost strength. The system makes it possible to create large windows with minimalistic frames, in all types of opening: side-hung, bottom-hung and top hung, tilt and turn, pivoting, sliding and folding.

Cold-formed steel profiles—available in both galvanized and bright finishes—feature a smooth, consistent surface that is ideal for a variety of finishing options. Instead of traditional paint, designers can choose light brushing or blackening techniques to achieve a more customized aesthetic.

As with hot-rolled systems, the corners of cold-rolled steel windows and doors are always welded. Depending on the visual preference, welds may be left visible, ground flush for a cleaner look, or accentuated through brushing or patina treatments.

The Ottostumm W50 TB series, including lift & slide configurations, are produced through precision cold-forming technology—ensuring exceptional accuracy, performance, and refined appearance in every window and door.

Ottostumm Steel & Bronze Systems

At PINKYS, we proudly design and craft our steel and architectural bronze windows and doors using Ottostumm systems—globally recognized for their precision engineering, design versatility, and timeless aesthetic.  Ottostumm steel profiles are available in a range of configurations to meet virtually any architectural requirement, from modern minimalist structures to heritage restorations and urban redevelopment projects. Their hot-rolled steel systems reinterpret the classic steel window and door designs of the early 20th century, preserving their clean, elegant lines while enhancing performance for contemporary use.  With a choice of finishes—from Ottostumm’s signature “natural steel” surface, ideal for achieving an industrial or raw aesthetic, to custom RAL and bespoke color coatings—PINKYS offers complete design flexibility. These systems allow us to create custom steel doors, windows, sliding and folding systems, and expansive glazed façades, adaptable to both residential and commercial applications of any scale.

Precision Engineering & Collaboration  

From the initial concept and feasibility review to detailed cost estimation and technical coordination, our team works closely with architects, designers, developers, and builders to ensure seamless integration into each project. Every system is engineered with a focus on precision, performance, and enduring design integrity, reflecting our commitment to craftsmanship and innovation.  At PINKYS, we understand that modern architecture demands a new generation of steel and bronze fenestration systems—ones that combine the timeless character of classic ironwork with today’s expectations for comfort, energy efficiency, and durability. That’s why we partner with Ottostumm, whose ongoing research and development in materials and fabrication technologies enables us to deliver steel systems with outstanding strength, security, and thermal and acoustic performance.

Certified Quality & Performance

Every Ottostumm system used in PINKYS products undergoes rigorous testing and certification at internationally accredited institutes. This ensures our steel windows and doors meet the highest standards for air, water, and wind resistance, as well as security, burglary protection, and long-term durability.  For projects with unique design requirements or specific environmental conditions, PINKYS relies on these certified systems to provide tailored, high-performance solutions that meet both aesthetic and technical demands.

Craftsmanship & Innovation

Our in-house workshop serves as a hub of design innovation, where we continuously test, refine, and develop new steel and bronze products to push the boundaries of architectural fenestration. We produce custom samples and full-scale mock-ups for each project, ensuring exacting precision and design intent.  Whether restoring a historic landmark or creating a bold contemporary statement, PINKYS preserves the authentic beauty and character of traditional steel architecture while upgrading each element to meet modern standards of safety, performance, and efficiency. Every window and door is meticulously crafted to order, blending engineering excellence with architectural artistry to bring your vision to life.

Hot-Rolled Steel

For over a hundred years, hot-rolled steel has been a preferred material in the fabrication of windows and doors. The hot-rolling process imparts a distinctive texture that highlights steel’s authentic, industrial character. Subtle rolling marks and natural surface variations—often referred to by architects and designers as “beauty marks”—give this material its unmistakable charm, making it highly sought after for slender, elegant profiles.

In hot-rolled steel windows and doors, the corners are always welded. Depending on the aesthetic goal, welds may be left exposed, ground smooth, or artistically enhanced—sometimes brushed to achieve a silver sheen or treated with patinas for a darker finish. The Ottostumm W20 and W40 collections revive the traditional hot-rolling techniques of the 1930s, refined today with advanced modern manufacturing technologies.

Beyond its visual appeal, hot-rolled steel represents a fusion of strength, longevity, and artisanal precision. Each profile is formed from solid steel, ensuring exceptional rigidity and the ability to accommodate expansive glass panes with minimal sightlines. This combination of structural integrity and slender geometry allows architects to create façades that appear effortlessly light while maintaining the robust performance required for demanding architectural applications.

The natural density of hot-rolled steel also contributes to superior durability and resistance to deformation over time, making it a preferred choice for projects where endurance and timeless aesthetics are equally important. When paired with high-performance glazing and modern thermal break technologies, these systems deliver outstanding energy efficiency without compromising the material’s authentic character.

Every Ottostumm hot-rolled system reflects a commitment to craftsmanship—merging traditional fabrication methods such as precise welding and hand finishing with today’s advanced production standards. The result is a collection that not only honors the legacy of early steel fenestration but elevates it for the architectural needs of the present day.

Cold-Rolled Steel

Cold-formed steel profiles—available in both galvanized and bright finishes—offer a smooth, uniform surface ideal for a wide range of finishing options. Rather than traditional paint, designers can opt for light brushing or blackening techniques to achieve a more distinctive and customized aesthetic. As with hot-rolled systems, all corners of cold-formed steel windows and doors are fully welded. Depending on design intent, welds may be left visible, ground flush for a cleaner appearance, or highlighted through brushing or patina treatments.

The Ottostumm W50 TB series, including lift & slide configurations, is manufactured using precision cold-forming technology, ensuring outstanding dimensional accuracy, performance, and a refined architectural appearance in every window and door.

Beyond their refined appearance, cold-formed steel systems offer measurable performance advantages that make them an exceptional choice for contemporary architecture. The precision manufacturing process delivers consistent dimensional stability, ensuring tight tolerances and reliable alignment across even the most complex assemblies. Combined with advanced thermal break technology, these systems provide excellent energy efficiency without compromising on the slender sightlines that define modern steel fenestration.

Durability is another hallmark of cold-formed steel. The protective galvanized or bright finish resists corrosion, while the inherent strength of the material allows for large-format glazing and minimal frame profiles. This balance of structural integrity and visual lightness enables architects to realize designs that are both technically robust and aesthetically refined.

Each Ottostumm system embodies a commitment to craftsmanship and innovation, merging time-honored steelworking techniques with state-of-the-art production methods. The result is a product line that not only performs to the highest standards but also expresses the material’s timeless architectural character.

Steel Window Fittings

PINKYS offers black window handles from SWF (Steel Window Fittings) — the traditional choice for authentic steel windows. These handles are available in several configurations, including:

• 4-hole backplate handles for standard steel window applications
• Duplex handles featuring two locking points operated by a single handle
• Triplex handles featuring three locking points operated by a single handle

To complement these options, connecting rods are available for duplex and triplex brass handle systems, ensuring smooth and secure operation.

For added functionality and classic appeal, our traditional window stays allow you to hold the sash open at any desired position. With a range of sizes, styles, and finishes, you can easily create a distinctive and cohesive steel window system that meets both aesthetic and performance requirements.

Rocky Mountain Hardware

At PINKYS, we are proud to offer Rocky Mountain Hardware, a collection that exemplifies American craftsmanshipand timeless design. Each piece is handcrafted from premium-quality bronze, a material chosen for its natural warmth, depth, and enduring character. The result is hardware that feels as inviting as it looks—rich in texture, substance, and authenticity.

Every element of Rocky Mountain Hardware is individually sculpted, cast, and finished by hand. From the creation of each mold to the final patina, skilled artisans shape every detail with care and precision—ensuring that no two pieces are ever exactly alike. This meticulous process is what gives the hardware its distinctive artisanal quality and lasting beauty.

Unlike mass-produced alternatives, Rocky Mountain Hardware reflects a dedication to craftsmanship over quantity. Each handle, pull, and accessory embodies the perfect balance of form and function, combining tactile comfort with architectural sophistication. The hand-applied finishes age gracefully over time, developing a patina that enhances both the look and feel of every installation.

At PINKYS, we believe that exceptional design deserves equally exceptional details. That’s why we integrate Rocky Mountain Hardware into our custom steel doors and windows, offering our clients a level of quality and artistry that complements the precision and integrity of every PINKYS product.