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View from inside a revolving door mid-rotation, lobby floor sweeping left, exterior daylight entering right
Revolving Door Installation

The entrance your building
has been rehearsing for.

Frameless glass cylinders. Concealed drives. Tolerances measured in tenths of a millimeter.

Spec Your Entrance →
Modern hospital lobby with large revolving glass door entrance, bright interior lighting
01
Hospital Expansion · Columbus, OH

A vestibule that stopped hemorrhaging $38,000 a year.

The Problem

Mercy Regional's main entrance — four swing doors in an undersized airlock — was bleeding conditioned air into a northern Ohio winter. The facilities director had the utility bills. He needed the math to justify a capital project.

The Engineering

We specified a 7-ft diameter, four-wing automatic with a concealed low-energy drive rated to 1,200 cycles per day. Wind-load analysis at the site's corner exposure dictated a 12 mm tempered glass pack, not the standard 10 mm. The vestibule geometry was redesigned to eliminate the swing-door bypass lane entirely.

The Result

$38,400 annual HVAC savings. 14-month payback. The entrance has run 847 days without a service call.

$38,400 / yr saved

Verified HVAC delta, first full heating season

See the full spec sheet
Sleek modern office tower lobby with frameless glass revolving door, polished stone floor
02
Office Tower Retrofit · Chicago, IL

A 1974 tower's lobby, rebuilt for the next fifty years.

The Problem

400 Civic Plaza's property manager was losing Class-A tenants to newer buildings with frameless glass lobbies. The existing entrance — a 1974 revolving door with a brushed-bronze housing the size of a refrigerator — read as institutional. The constraint: the terrazzo floor was protected. Nothing could be cored.

The Engineering

We engineered a surface-mounted, frameless three-wing manual on a concealed ceiling track. Zero floor penetration. The center column diameter was reduced from 14 inches to 6 inches by moving the drive mechanism into the soffit. Balance was tuned to 0.4 lbs of push force at the leading edge — the standard for accessible manual doors.

The Result

Tenant retention improved measurably in the following lease cycle. The lobby won a Chicago Commercial Interiors commendation six months after installation.

0.4 lbs

Push force at leading edge — accessible without a power assist

See the full spec sheet
Luxury retail flagship store entrance with bespoke frameless glass revolving door, bronze accents
03
Flagship Retail · New York, NY

The entrance the architect drew. Exactly.

The Problem

Harlow's architect had drawn a 9-ft diameter, two-wing frameless cylinder with an acid-etched glass band at eye height and a custom-milled bronze threshold. Three fabricators told her it couldn't be done to her tolerances. One told her to reduce the diameter.

The Engineering

We sourced a German-made curved glass pack ground to ±0.5 mm tolerance, fabricated a bespoke center column in solid bronze bar stock, and coordinated the threshold detail with the marble contractor so both trades finished flush on the same day. The drive is a variable-speed low-energy unit programmable for morning rush, afternoon, and after-hours modes.

The Result

The entrance opened with the store. The architect specified us on two subsequent projects without going back out to bid.

±0.5 mm

Glass tolerance achieved — half what the competition quoted as minimum

See the full spec sheet
Spec Your Entrance
Is Your Building Ready?

Three signals that a building is ready for a revolving door.

01

Your energy model has a vestibule line item.

If your mechanical engineer has already flagged the main entrance as an infiltration source — or your utility bills show a winter spike that correlates with lobby traffic — the ROI calculation is straightforward. We'll run the numbers with you in the first call.

02

The architect's drawing has a cylinder, not a rectangle.

A revolving door is a different structural and finish trade than a swing door. If the spec already calls for one — or the rendering assumes one — bring us in before the GC bids. Diameter, wing count, drive type, and threshold detail all affect adjacent trades.

03

The existing entrance is the building's weakest first impression.

Tenant retention, leasing velocity, and brand perception are harder to quantify than HVAC savings, but they're real. If the entrance reads as older or cheaper than the rest of the building, that gap has a cost. A new entrance system is one of the few renovations visible from the street and felt on entry.

If any of those three signals are present, the conversation is worth having. We don't sell doors — we spec entrances. The first call is an engineering conversation, not a sales pitch.

Spec Your Entrance