ARCHITECT: OLSON KUNDIG

THINLINE 2500

MINIMAL FRAME SLIDING DOOR

Architectural Details

MINIMAL FRAME

A state-of-the-art sliding system that explores the structural properties of glass, enabling the execution of large glazed areas with the use of minimal profiles. Unlike traditional sliding systems, glass is the THINLINE series structural component, while the frame guides the motion of the door. This takes away the need for all unwanted elements that compose a traditional sliding system, by embedding the frame in the walls, floor, and ceiling, enabling an expanded and visually unobstructed perspective. Its 3/4" vertical profiles keep a consistent, unifying and almost imperceptible connection between panels.

ARCHITECT: KOVAC DESIGN STUDIO

SERIES OPTIONS

FLUSH

2500 Series — Flush Frame

The Timeless Original That Defined the Minimal Movement

The Flush Frame is the system that started it all—our foundational expression of minimal design and architectural integrity. Built around our classic 2" profiles at the sill, jamb, and header, this configuration delivers clean, uninterrupted lines that feel both familiar and enduring.

Ideal for limited-space applications, the Flush Frame maintains a refined silhouette without compromising functionality. Every profile aligns in a unified plane, providing a smooth, flush transition around the entire perimeter. The effect is subtle yet unmistakable: a frame that recedes into the architecture while still offering the structural clarity and balance designers rely on.

Its simplicity is its strength.
Its proportion is its elegance.
And its longevity is the hallmark of true design.

HIDDEN

2500 Series — Hidden Sill Frame

Where Architecture Meets Effortless Disappearance

The Hidden Sill Frame is the signature choice of designers and homeowners who seek a seamless transition without sacrificing structural purity. This configuration features our refined 3/8" linear guidance slot at the sill—subtle, sophisticated, and nearly invisible—allowing sliding panels to float across the threshold with a quiet, architectural grace.

At the jambs and head, our standard 2" profiles maintain the perfect balance between minimal sightlines and engineered strength. The result is a composition that feels intentional and weightless, yet unwavering in performance.

By visually recessing the sill into the finished flooring, the frame dissolves into the architecture, expanding the sense of openness while maintaining clarity and control in every movement. Spaces feel larger, lighter, and more connected, inviting the exterior in without interruption.

The Hidden Sill Frame is more than a detail—
it's a design signature.

ABSOLUTE

2500 Series — Absolute Frame

Where Architecture Transcends the Frame

The Absolute Frame is the purest expression of minimalism—an architectural gesture so refined it nearly disappears. Engineered around a precision 3/8" linear guidance slot at the sill, jambs, and header, this system removes the visual weight traditionally associated with sliding doors. The result is a completely frameless aesthetic, allowing the architecture, the landscape, and the light itself to become the focal points.

Every panel glides with effortless intention, guided not by bulky hardware but by an elegant sublinear pathway hidden within the structure. What remains is an uninterrupted plane of glass—pure transparency, pure connection, pure design.

With the Absolute Frame, boundaries no longer divide spaces—they dissolve. Interior and exterior blend into one continuous experience, expanding the perception of scale, openness, and possibility.

This is minimalism elevated.

DEFLECTION HEADER

2500 Series — Deflection Header System

Engineering That Honors Architecture at Scale

The Deflection Header System has become an indispensable companion to our sliding assemblies—an innovation born from the need to support architecture at its most ambitious. Designed to absorb up to 1-1/8" of downward movement, this engineered header ensures structural shifts are managed seamlessly above the opening, preserving the purity and performance of the sliding system below.

For expansive spans and monumental glazing, the Deflection Header System serves as the quiet guardian of the design vision. It allows the largest openings to remain true, aligned, and effortlessly operable, even as the structure above responds to load, time, and environment.

Paired with our 2500 Series sliding systems, it elevates what is possible—enabling broader vistas, taller panels, and architecture that breathes with its surroundings without compromise.

Strength behind the minimalism.
Confidence behind the scale.