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Home / Floor Springs / Heavy-Duty Recessed Floor Box for KFC-Style Doors – Available in Small, Medium, and Large Sizes for Commercial McDonald's Door Hinge Bearings and Accessories

Attributes

Brand -
Category Basic Building Materials / Floor Springs
Origin -
Material Heavy-Duty Stainless Steel
Finish Brushed Nickel
Available Sizes Small, Medium, Large
Door Compatibility Commercial Pivot Doors (KFC/McDonald's Style)
Load Capacity Up to 300 lbs per door
Installation Type Recessed Floor Mount
Adjustability 3-Way Speed and Latching Adjustment
Fire Rating Suitable for Fire-Rated Door Assemblies
Warranty 5-Year Limited Manufacturer Warranty
Package Includes Floor Box, Cover Plate, Mounting Hardware, Installation Template

6 reviews

A

Anonymous

Mar 28, 2026

Rating: 4/5

Solid unit, instructions could be clearer

The floor box itself is incredibly sturdy and looks great once installed. I deducted one star because the installation template was a bit faint, making the concrete cutting phase slightly tricky.

A

Anonymous

Mar 25, 2026

Rating: 4/5

Great value for heavy-duty use

Compared to other brands, this offers better adjustability at a competitive price. The stainless steel finish resists scuffs from foot traffic very well.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Perfect for high-traffic entrances

We installed the large size on our main entrance, and it handles the constant flow of customers effortlessly. The build quality is exceptional, and the adjustment features made calibration simple.

A

Anonymous

Mar 16, 2026

Rating: 5/5

Reliable for commercial projects

We have used these in three different restaurant builds this year. They are durable, easy to source in different sizes, and hold up well against heavy daily use.

A

Anonymous

Mar 10, 2026

Rating: 5/5

Exactly what we needed for our franchise

Ordered the medium size for a side exit door. It matches the specifications for our existing hinge bearings perfectly. Very smooth operation and quiet closing action.

A

Anonymous

Mar 10, 2026

Rating: 5/5

Smooth operation immediately after install

No break-in period needed. The door swung smoothly right after we finished tightening the screws. Highly recommend for anyone upgrading old floor springs.

5 FAQ

Q: Is the cover plate sold separately?

A: No, the cover plate matching your selected finish is included in the package with every floor box unit.

Q: Does this work with aluminum door frames?

A: Absolutely. This floor box is compatible with aluminum, steel, and wood door frames as long as the pivot hardware is correctly aligned.

Q: Does the large size fit standard 4-foot commercial doors?

A: Yes, the Large size is specifically designed to support standard 4-foot wide commercial pivot doors commonly found in fast-food franchises.

Q: Can this be installed on an existing concrete floor without removing the whole slab?

A: Yes, installation requires core drilling or chiseling a recess into the existing concrete to house the box flush with the floor surface.

Q: What is the difference between the Small, Medium, and Large models?

A: The primary differences are the load capacity and the physical dimensions of the housing. Small is for lighter interior doors, while Medium and Large are rated for heavier exterior traffic doors.

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