The strongest, longest-lasting, lowest-maintenance hydraulic door you can put on a building — engineered to your exact opening.
One moving panel. Two hydraulic rams. Zero compromises. Built by the manufacturer the U.S. military, marinas, and farms have trusted for 40 years.
✓ Custom-engineered · ✓ 50-state certified · ✓ Drawings back in one business day
Max door size
Building doors
Single-panel
Certified
Trusted on America’s most critical projects
For four decades, Well Bilt has engineered and fabricated hydraulic hangar doors for the toughest customers on earth — every branch of the U.S. military, coastal marinas, and working farms. When the door absolutely has to open, they call us.
Every door is custom-built to your opening with stamped, wind-rated drawings — no field modifications.
One rigid panel on two rams means less to break and one of the longest service intervals on the market.
Send us your opening and facility type — detailed numbers and pricing come back in one business day.
Miami-Dade Approved, certified in all 50 states, installed on federal and military facilities nationwide.
A hydraulic hangar door is a single-piece door that swings outward and up on two hydraulic rams, hinged at the top of the opening. Because the whole door is one rigid panel, it opens with very few moving parts, seals tightly against the weather, and clears the full height of the opening with no loss of headroom. Well Bilt builds them to order — up to 135′ wide and 40′ tall — for aircraft hangars, marine facilities, agricultural buildings, and heavy industrial spaces.
A hydraulic door is the right call when the opening is large, the weather is rough, and uptime matters more than anything.
Full-height clearance for tails and wings, fast cycles, and weather-tight sealing.
Trusted on Air Force, Navy, Marine Corps, and Coast Guard installations.
Big, durable openings for machine sheds and equipment barns.
Corrosion-aware builds and tight seals for coastal facilities.
The most common question buyers ask. Here’s the honest trade-off — then go deeper in our comparison guides.
| Factor | Hydraulic | Bifold | Rolling / Sliding |
|---|---|---|---|
| How it opens | Swings out & up, one piece | Folds in half, vertically | Slides horizontally on track |
| Headroom / clear opening | Full height, no loss | Slight loss at fold | Full height |
| Space needed in front | Needs clearance to swing out | Minimal — park close | None in front (needs side wall) |
| Moving parts / maintenance | Fewest — lowest upkeep | More (cables, straps, hinges) | Tracks & rollers to maintain |
| Weather seal / insulation | Best — one-piece seal | Good with modern seals | Good |
| Upfront cost | Higher | More budget-friendly | Varies with size |
| Best when… | Uptime, weather & clearance matter most | Space is tight or budget is key | No room to swing or fold |
A quick, practical comparison of the two most popular hangar doors.
Which is right for your hangar? Trade-offs by use case.
The real difference between the two systems.
With only a few moving parts, one of the simplest large doors to operate.
One of the longest service intervals of any large door. Rebuildable cylinders.
Knuckle splice joints, pin points, and keyed lock-out on every operator.
EPDM style-40 seals resist ozone, steam, solvents, and temperature extremes.
Built to your exact opening with wind-load calcs and stamped drawings.
Miami-Dade Approved with certificates for all 50 states and the Caribbean.
Real Well Bilt single-panel hydraulic installations — military, marine, agricultural, and industrial.
Every Hydra-Eze door is driven by a Well Bilt Hercul-Eze® hydraulic operator — delivered filled, purged, and ready for bolt-in installation. The operator holds the door at any position of travel, conforms to national electric codes, and uses a keyed lock-out.
Optional auto open/close, multiple voltage configurations, and pressure/limit switches match the operator to your facility and door size.
All the detail you expect — organized and scannable. Available as a stamped submittal on request.
Pre-hung frame in ASTM A500 Grade B welded square/rectangular steel tubing, 11-gauge to 3/8″ wall, min. yield 46,000 psi. Exterior corners mitered at 45°; all joints welded. Framing true to within 1/8″ in 20′.
Two industrial double-acting hydraulic cylinders rated 3,000 psi minimum; rebuildable. Operators 2–5 HP+ TEFC, mounted center-above for balance. Standard 230V single-phase; three-phase optional.
¼″–3/8″ ID flexible braided line with SAE fittings, 3,000 psi rated. Valves 5 GPM min; 50-50 mechanical flow dividers and in-line regulator for adjustable speed. Return-line filter with replaceable element.
Heavy-duty welded hinges with 3/4″ pins tested to 15,000 lb tension loading; top hinges ~every 10′, pre-lubed for life. 1″ floor lock pins engage sleeved slab holes, min. 3 per door.
EPDM style-40 seals (12″ top / 10″ bottom). Every door factory-tested and video-recorded. Florida PE wind-load certification available. Miami-Dade Approved Manufacturer.
Shipped one-piece whenever dimensions allow, per DOT standards. When too tall to ship in one piece, a fold-over design adds center hinges so the door folds for transport and unfolds on site.
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Two double-acting hydraulic cylinders push the single-piece door outward and upward, pivoting on heavy-duty top hinges. The operator can hold the door at any point in its travel and seals it tight when closed.
Well Bilt builds single-panel hydraulic doors up to 135′ wide and 40′ tall. Doors too tall to ship in one piece use a fold-over design with added center hinges for transport.
Hydraulic doors win on headroom, weather sealing, and low maintenance; bifolds win on tight front clearance and upfront cost. If uptime and weather resistance matter most, choose hydraulic.
Very little. With only a few moving parts and rebuildable cylinders, Hydra-Eze doors have one of the longest service intervals of any large door — typically periodic seal and fluid checks.
Because the door swings outward, you need clear space in front of the opening equal to roughly the door’s projection at full open. Our drawings specify the exact swing path for your size.
Hydra-Eze hydraulic doors carry a limited warranty against defects in materials and workmanship, with extended coverage available. Each door ships with an owner’s manual specific to your custom build.
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