Aircraft hangar roofs present unique commercial roofing challenges because hangars often combine very large roof areas, long structural spans, large door openings, and significant exposure to wind. In Florida and other hurricane-prone regions, hangar design must account for wind uplift and severe weather while also providing a durable, maintainable roofing system.
The roof is not simply a covering over the building. Its structural system, roof deck, insulation, membrane or metal panels, connections, and perimeter details must work together to transfer loads safely to the building structure.
Long-Span Structural Design
Aircraft hangars need large unobstructed interior spaces so aircraft can be stored, serviced, and moved efficiently. This requirement often results in long-span structural systems using steel trusses, rigid frames, space frames, or other engineered structures.
The roofing assembly must accommodate the movement and loading characteristics of these large structural systems. Structural engineers consider dead loads, live loads, wind loads, drainage loads, equipment loads, and applicable code requirements when designing the roof.
Long-span roofs can also experience greater structural movement than smaller commercial buildings. Roofing materials and attachment systems must therefore accommodate expected expansion, contraction, deflection, and other movement without compromising waterproofing.
Wind Uplift Is a Major Consideration
Aircraft hangars can be particularly vulnerable to wind because of their large roof surfaces and large exterior doors. Wind creates pressure differences across the building that can produce significant uplift forces on the roof.
In Florida, hurricane wind resistance is especially important. The roof system should be designed according to the applicable building code and project-specific wind requirements.
Wind resistance involves more than selecting a strong membrane. The complete load path—from the roof covering and attachment system through the deck and structural framing to the building foundation—must be considered.
Roof Edge and Perimeter Detailing
Roof edges are particularly important because wind forces can be concentrated around perimeter zones and corners. Edge securement, coping, flashing, gutters, and other perimeter components should be engineered and installed to withstand the project’s wind demands.
Improperly detailed edges can become weak points even when the main roof field is adequately attached.
Large Hangar Doors and Wind Pressure
Hangar doors create another design challenge. Very large openings can influence internal building pressures during high-wind events.
The hangar’s structural and door systems must be designed together so that the building can resist the expected combination of external and internal pressures. Roof design should account for these conditions rather than treating the roof as an isolated component.
Metal and Membrane Roofing Options
Depending on the hangar’s design, climate, structural system, and operating requirements, metal roof panels or commercial membrane systems may be used.
Standing-seam metal roofing can provide durability and accommodate large roof areas when properly engineered. Commercial membrane systems may also be suitable where the roof deck and structural configuration support them.
The choice should consider wind uplift resistance, thermal movement, corrosion exposure, maintenance requirements, drainage, and expected service life.
Drainage and Ponding Water
Large hangar roofs also require carefully planned drainage. Roof geometry, slopes, drains, gutters, scuppers, and overflow provisions should be designed to handle expected rainfall.
In Florida, intense rainfall can quickly overwhelm poorly maintained or inadequately designed drainage systems. Standing water can add load to the roof and accelerate deterioration of roofing components.
Drainage systems should be kept clear of leaves, palm fronds, and other debris as part of routine maintenance.
Equipment and Roof Penetrations
Aircraft hangars may contain HVAC systems, ventilation equipment, lighting systems, exhaust systems, and other rooftop components. Each penetration must be properly integrated into the roofing system.
Unnecessary penetrations should be minimized where practical, and equipment supports should be designed so maintenance activities do not compromise the roof.
Corrosion and Industrial Exposure
Hangars can expose roofs to aviation fuels, hydraulic fluids, cleaning chemicals, exhaust, and other contaminants depending on how the facility is used.
Roofing materials, coatings, metal components, fasteners, and sealants should be evaluated for compatibility with the facility’s operating environment. Corrosion-resistant materials and protective finishes may be appropriate in certain applications.
Inspection and Maintenance
Because hangar roofs are large and exposed to significant wind forces, regular professional inspections are important. Inspections should examine membrane or panel condition, seams, fasteners, flashings, roof edges, drainage systems, penetrations, and signs of wind damage.
After a hurricane or severe storm, the roof should be inspected for displaced panels, damaged flashing, punctures, loose components, and drainage problems.
Conclusion
Aircraft hangar roofs are designed around the combination of long structural spans, large unobstructed spaces, wind uplift, internal pressure, large doors, drainage, equipment loads, and environmental exposure.
For Florida aircraft hangars, proper engineering of the entire roof assembly and structural load path is essential. A commercial roofing professional working with the project’s structural and design teams can help ensure that the selected roofing system, attachment method, perimeter details, and maintenance program are appropriate for the hangar’s specific wind and operational requirements.
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