The hinge system for high frequency and heavy-duty doors

The functionality of a door opening is a crucial life/safety requirement for commercial buildings, especially fire doors. If a door cannot be opened or closed, an entire section or area of a building may be closed off. For this reason, annual fire inspections were introduced by the National Fire Protection Association (NFPA). NFPA 80, as the de facto standard for the installation and maintenance of fire-rated door assemblies, defines the requirements. 

Common door problems, e.g. door sagging, foundation wall settling, or warpage, require door assembly adjustments to maintain door functionality and meet life/safety requirements. Standard hinges, such as butt hinges or continuous hinges, generally do not offer a three-dimensional adjustment feature. Without an adjustment feature on the hinge, the repair options are limited to resetting and/or shimming a hinge, modifying an existing hinge, re-machining a door and/or un- and reinstalling the frame. Often, an existing wall must be refinished when a frame is reinstalled. Modifications to a hinge can compromise the integrity of the entire hinge assembly. These repair options are all time consuming and disruptive – not to mention, expensive.


Three-way adjustable hinge systems have been used successfully in Europe for many years in high frequency institutional, commercial and industrial applications such as office buildings, schools, hospitals and airports. This proven concept of door adjustability has been tailored specifically to fit the needs of the North American marketplace. Typically, continuous hinges are used in applications requiring robust hinges in North America. However, the VARIANT VX hinge series offers a similar durability with an additional three-way adjustability Feature. 



VARIANT - Simonswerk GmbH



The VARIANT series has been developed for wide, heavy duty doors that require a robust and stable hinge. High load values up to 300 kg (661 lbs.) distinguish this hinge system, as well as the maintenance-free slide bearing technology. The hinge features corrosion resistant 304 stainless steel and is suitable for use with functional doors in the field of fire and smoke protection (UL listed up to 3 hours for fire doors).


VARIANT hinge systems offer a simple three-way adjustability feature allowing the installer to meet precise installation and maintenance requirements with only a wrench. The door can be adjusted horizontally, vertically and in/out, giving the user the ability to compensate for any needed door adjustments. These adjustments can be performed at any time by maintenance staff.



VARIANT - Simonswerk GmbH

Model versions

The universal hinge system for heavy-duty doors

Product Features

  • Easily adjustable in 3D
  • For new hollow metal frame installations with wood
  • Load capacities of up to 300 kg (661 lbs)
  • UL Listed for 180 minute fire door

Hinge system with 3D adjustment in the door

Product Features

  • Fits North American templates, making it ideal as a retrofit hinge for renovations
  • Door Leaf with integrated three-way adjustment mounted in the edge of the door Panel
  • Load capacities of up to 120 kg (264 lbs.)
  • UL listed for 90 minute fire door

VARIANT VX installation video


Detailed demonstration of VARIANT VX installation – take a look!








Hinge details at a glance

Find all necessary product information with just a few clicks!

• Quick access to important hinge details
• Technical information readily accessible
• Product information available for download
• Intelligent and intuitive user-friendly system


Solutions for special requirements


The hinge system for commercial flush doors with swing-clear requirements in health care facilities.

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The compact hinge system with innovative 3D adjustment.

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Selected references

Hudson Tower, New York, USA

Swissotel, Chicago, U.S.A.

Business Centrum Moscow, Moscow, Russia

Airport Satellit, Munich, Germany

Elbphilharmonie, Hamburg, Germany

520 West 28th Street, New York, USA

Next Level, Ankara, Turkey

Museum of the Bavarian kings, Hohenschwangau, Germany

Museum of Modern Art, New York, USA

Product brochure VARIANT

You can download the current product brochures here.