Aircraft hangar doors

Spec-Dor — building door systems architects,
contractors, and hangar operators can count on.

Spec-Dor is a leading manufacturer of high-performance custom-engineered aircraft hangar doors, specialized in wide-span openings—like 300′-600′ (91-183m) span MRO door systems for massive wide-body airliners.

Founded in 1972 by Walter Timoschuk, an experienced aviation industry engineer driven by the idea of creating a perfect hangar door, Spec-Dor is currently headed by Alexander Timoschuk, President, CEO, and chief engineer. Our company has over 50 years of engineering experience with customized bottom rolling hangar door systems.

Our doors are designed for precision control, advanced security, and rock-solid reliability—custom engineered per project to meet the most rigorous structural requirements for any door dimensions. Spec-Dor provides end-to-end service: initial design, in-house fabrication, meticulous installation, and ongoing client support.

Built to handle extreme operational conditions, our hangar doors earn the trust of civilian and military aviation clients worldwide, such as Bombardier, Gulfstream, Transport Canada, and the US Air National Guard.

Spec-Dor: deeply rooted in an engineering tradition

Our focus is on the mechanical reality of aircraft hangar doors. As a company founded and led by engineers, we make doors that consistently perform without fail under peak operating conditions.

Our experience building heavy-duty large-span hangar doors is applied to every project, delivering absolute structural rigidity, overperforming components (not just adequate), near-airtight sealing, and user-friendly controls. Every component is built to meet our high performance standards, consistently exceeding building code minimums.

Each Spec-Door door is designed to meet the unique and varied requirements of the specific project:

ST Engineering (global technology, defence & engineering group): In Pensacola, Florida, a massive 600’x50′ (183m x 15m) door system for a wide-body MRO complex, comprised of six independently operable panels on three tracks for maximum versatility.
St. Barth Commuter (regional carrier): On the tropical storm-prone Caribbean island of St. Barthélemy, a hurricane-destroyed bi-fold door upgraded to a bottom rolling door system, with simultaneous improvements to the damaged but structurally sound building envelope, resulting in a hugely improved “new” hangar.
US Dept. of Defense Utah Test and Training Range: An unconventional adaptation of bottom rolling door strengths to a vertical opening, resulting in a raised metal door with sliding sections, for a rail-mounted mobile hangar.

To learn more from an engineering perspective, the Spec-Dor Buyer’s Checklist provides a point by point overview of critical, often underexamined door details. Our free downloadable Hangar Door Buyer’s Guide goes more in-depth in a quick, illustrated read.

Competitive Advantages: What Sets Spec-Dor Apart

At Spec-Dor, our signature is an unwavering focus on detail at every step — from design and manufacturing to installation and long-term operation — wherever the project is located.

Collaborative, cost-saving hangar door design — we work with architects, builders, and operators to deliver seamless door integration.
Coordination with contractors — proactive coordination ensures projects stay on schedule and within budget.
In-house precision manufacturing — reduces component costs and lead times while maintaining strict quality.
Tailored engineering for extreme conditions — hangar doors individually customized to withstand harsh climates and demanding operational environments.
Advanced sealing systems — fully-integrated, near air-tight door seals provide superior protection from weather, dust, debris, and pests.
Electronic controls built for ease of use — ergonomic systems optimized for fast, precise response, friendly interfaces, and enhanced safety.
Available worldwide — Spec-Dor delivers end-to-end service, from design through installation, anywhere in the world.

How Our Experience Translates to Outstanding Results

By collaborating closely with architects, contractors, and operators, Spec-Dor applies insights and best practices drawn from decades of hangar door experience. Our input helps identify and address common design and installation issues before problems arise. The result: time and cost savings both during construction and across long-term operation.

Diverse Project Portfolio
Airlines, airports, helicopter facilities, aerospace manufacturers, FBO and MRO centers, military airbases—our hangar doors are in service across virtually every aviation environment. This breadth enables us to adapt smoothly to a wide range of specifications and compliance requirements.
Proven Planning Method: i-Cubed (Innovative Interface Integration)
i-Cubed is our documented, time-proven approach to making sure that each hangar door is properly matched and integrated with the building envelope.

Global Reach, Local Expertise
We have successfully executed projects on five continents and maintain regional representatives in North America, Latin America, Europe, the Middle East and Africa. Combining global experience with local expertise ensures that each project benefits from best practices tailored to its region.