This page goes beyond photos of welding heavy steel to look at the six stages of building a wide-span bottom-rolling hangar door system: design, engineering, manufacturing & shipping, installation, commissioning & handover, and long-term operation. Each stage involves distinct considerations and decisions, and apply to fabric doors as well.
(All photos are Spec‑Dor projects and representative of industry standards and best practices.)
Design occurs when specifications are still fluid and feature lock-in hasn’t yet occurred. From a hangar door perspective, beginning the design phase as early as possible—in collaboration with the architect, client, and operator—allows consideration of myriad factors, including the building envelope, location, site conditions, climate, aircraft mix, workflow, and budget. Door-centric analysis routinely uncovers overlooked needs, and many factors interrelate. For example, aircraft type influences the number of door panels, which affects operational efficiency, as well as heating and cooling loads.
Modern hangar door systems require custom manufacturing facilities for quality control. Specialized machinery, expert teams, and established subcontractor networks (e.g. galvanizing) maintain precision that on-site construction can’t practically match. Cost-effective shipping of ready-to-assemble doors over long distances relies on modular design and logistics experience.
Installation is as critical as design, engineering and manufacture. Errors at this stage can compromise a structurally impeccable hangar door. Contractors typically involved, depending on metal or fabric door type, include general, structural, concrete, plumbing, electrical, and others. Scheduling requires well-choreographid timing and sequencing. Unpredictables like weather and minor snafus and delays have to be worked around without introducing errors. Critical procedures like track installation and door alignment require expert oversight.
A victory lap of sorts: testing every function and feature, making sure the client is operationally up to speed, then handing over the keys. In this stage, fine-tuning adjustments can be made to things like the control systems. Operator training is provided, including door capabilities, controls, and scheduled maintenance. A complete owner’s documentation package includes manuals, certifications and warranties, emergency procedures, and a critical-contacts list.
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