Technical Information

Here you will find a summary of all technical subjects comprising all product ranges.  You will learn interesting facts far beyond the general catalogue data which will assist you with your daily work and will help you select the right hinge for your application.





  • Testing
  • Hinge Reference Line (HRL)
  • Load capacities
  • Options
  • Finishes & Hinge Knuckles

CE mark

After comprehensive tests based on above standards "single-axis hinges on doors and windows" the ift Rosenheim has issued the EU conformity certificate for all relevant SIMONSWERK hinge types.


Tests to DIN EN 1935 are generally conducted with one supporting hinge only. SIMONSWERK hinges are generally tested acc. to the standard with the largest possible number of closing operations - 200,000 cycles. Furthermore many hinges were tested with a load value significantly higher than prescribed according to the rules. The consistent product quality is now guaranteed by an inhouse production control system and by the annual audit done by ift Rosenheim.

All CE-certified products have a classification key. This 8-digit code contains all essential information about properties, load capacity and application field of the hinge.

In practice it is expected that tenders will mainly refer to the first digit of this code, the so-called application class. Almost all SIMONSWERK hinges have been tested and certified to the highest application class - very heavy usage. With the CE mark SIMONSWERK has a further quality label, now valid throughout Europe, which underlines once more the high quality of SIMONSWERK products.

On 01/07/13, the new Construction Products' Regulation came into effect. In addition to the product identification, the provision of so-called Declarations of Performance is a key requirement. SIMONSWERK provides these Declarations of Performance - divided into six different groups.

International testing

Safety of use, even under extreme conditions, is our concern. In order to achieve this we have our products tested not only in Germany but also worldwide by International institutes. Thoroughness, elaborateness and experience of institutes such as Underwriters Laboratories having made decisive contributions to improvements regarding fire protection in the USA since 1894, and Exova Warringtonfire, the largest and most modern independent fire test laboratory located in Europe, Asia and Australia, comply with the test criteria related to SIMONSWERK door hinges.


Any product that leaves SIMONSWERK and is certified by any of these institutes, can unhesitatingly be used in international building projects in accordance with the respective regulations. Such compatibility convinces architects and planners as well as door manufacturers.

Our longtime experience, combined with the expertise of these well-reputed testing institutes, creates optimally designed functional elements. We look forward to receiving your call in order to specify the ideal hinge for your individual application.

Classification code


Classification of hinges to DIN EN 1935

The European standard EN 1935 determines the test methods and requirements of single axis screw-on hinges and hinges with fixed pins for entrance doors and windows and classifies them referring to an 8-digit designation system.

Classification key according to DIN EN 1935

Description of hinges according to CUAP 04.05/12
 CUAP 04.05/12 specifies test procedures and requirements for multi-axis hinges and classifies them with an 8-digit coding system.

Classification key according to CUAP 04.05/12

Hinge reference line for standard doors

The hinge reference line (HRL) acc to DIN 18268 is the defined edge of a door hinge positioned within a certain distance to the upper edge of the door rebate or the inner edge of the door frame.


It is the accurate definition of the hinge reference line for the upper and the bottom hinges which facilitates the interaction of door leaf, door hinge and door frame and which allows a separate production of industrial or crafted door elements.

The hinge reference line as indicator of dimensions does not depend on hinge type and hinge manufacturer. As a door leaf is always fixed with at least two door hinges to a frame, there is an upper hinge reference line (1st hinge reference line) and a lower hinge reference line (2nd hinge reference line).

The distance of the 1st hinge reference line is always 241 mm below the frame rebate or 237 mm till the upper edge of the door rebate. The distance between the 1st and 2nd hinge reference line depends on the height of the door leaf (see table).

The hinge reference line can be unitary within a product group (example VARIANT VX, the hinge reference line generally being in the hinge centre), however, can also vary within a product group (example VARIANT VN, hinge reference line either being in the hinge centre or deviating from the centre).

The position of the third hinge can vary, howerever, in practice a distance of 350 mm (please note: new measurement) below the first HRL has proved itself.

As the positioning of the 3rd hinge has not been fixed in the standards yet, a precise coordination between door and frame manufacturer is highly recommended.


The load specifications for SIMONSWERK hinges referto a maximum door weight under consideration of the mentionedfactors that influence the load of the hinges.



All indications are based on following references:

Door leaf dimensions

1000 x 2000 mm

Use of

2 hinges

Hinge distance

1435 mm

Load Capacities

Criteria which are to be considered additionally when selecting the right hinge.


The following criteria shall stringently be considered when selecting a hinge in order to prevent consequential damage:

◾Installation site (residential building, public building, school, administration, barracks, kindergarten etc.)
◾Type of material of the element
◾Frequency of operation
◾Door dimensions (e.g. excess widths)
◾Positioning of hinges
◾Assembly of hinges
◾Outward opening doors (porch)
◾Door stop
◾Door closer
◾Wall soffits
◾Swing-door operator
◾Closing sequence control systems, etc.

Even under consideration of these different criteria an additional reserve should always be calculated when selecting the hinge. Especially in public buildings where special loads occur due to not always alculable closing frequencies and usage (kindergarten, barracks etc.), sufficiently dimensioned hinges should be used even if this would be unnecessary based purely on the door weight.

Third hinge

In addition to the factors mentioned above the use of a third hinge can have an significant impact on the load capacity.


In practice often a third hinge is located in the middle of the door in order to meet the optical demands and to minimise warping in the centre of the door. Under certain circumstances however it may be useful or even necessary to additionally support the upper hinge which takes most of the major tractive forces - this could be true, for instance, in the case of extra-wide doors (>1000 mm), where additional forces occur due to the lever action. For these applications the third hinge has to be located in the upper third since only then the load capacity of the hinge is positively influenced. The door regulations stipulate the use of a third 350-mm hinge (please note: new measurement) below the upper one (with reference to the upper HRL). In the case of unregulated units (e.g. exterior doors), SIMONSWERK recommends reducing this size to as far as 250 mm, depending on the knuckle length.

Wall openings, door stoppers

Factors such as door stoppers, projecting wall openings or similar cannot be measured or estimated and need to be considered individually, due to the lever action and forces that may occur if the door is opened too far resp. beyond a defined level. As a result of the doors' masses/weights, this can quickly lead to damage to the fastening, the hinges or similar. If it is necessary to use a door stopper, this should either be mounted on the wall or, instead, on the floor placed at 75% of the door's width away from the hinge axis in the direction of the lock.

Door drives

When a swing-door operator is used, SIMONSWERK recommends using a total of four hinges, placed in two pairs at the top and the bottom. The internal distance between a pair of hinges should not exceed 350 mm (please note: new measurement).




Door closers

When door closers are used, SIMONSWERK recommends the use of a third hinge in the upper third of the door. The correct adjustment of the closer is a fundamental requirement for a long-lasting, problem-free functioning.


Closing sequence control systems

When closing sequence control systems are used with double-leaf doors, it is important to ensure that a cushioned locking device is used for the active leaf, so that the forces are not transmitted to the hinges 1:1. In this case, SIMONSWERK recommends using a third hinge in the upper third of the door.


The points given here are simply guidelines. In practice, it may very well make sense, depending on the door's composition, usage levels, location, etc., to take the above factors into account even for door widths <= 1000 mm. This needs to be decided on a case-by-case basis. In any case, care must be taken to ensure that the hinges are of a sufficient size to be able to cover the extraneous factors.




Doors with excess widths

SIMONSWERK heavy-duty hinges have generally been designed for the indicated load capacities. Please take into account that for doors wider than 100 cm and the hinge spacing remaining constant the load capacities are reduced in percentages by the same ratio as the standard door width of 100 cm is exceeded (e.g. door width 125 cm = load capacity ./. 25 %). An accurate, professional fitting in accordance with the SIMONSWERK installation instructions is always a prerequisite.




Frame Fixing

To achieve a max load capacity of a door hinge a proper and appropriate assembly of all components is compulsory. Special emphasis shall be given to the fixing of the door element to the wall.


Especially closed frames, whether made of steel, aluminium or derived timber boards, often show a higher instability, therefore it is necessary to pay attention to a secure fixing to the brickwork or framework. Foaming alone in this area is not recommended for door weights >60 kg. Here, a force-fitted connection must be created via a screw or plug connection through the receiver, or max. 100 mm from the outer edge of the hinges.

Plaster proof receivers

The plaster proof receivers are designed in a way that penetration of mortar is prevented. When using thin fluid backfill material, an additional insulation, e.g. with self-adhesive tape, is highly recommended.

Non removable pin (MSTS)

For the use on outward opening doors all SIMONSWERK hinges with continuous hinge pin are available with non removable pin. Depending on the hinge range, different techniques are applied to either secure the hinge pin or the pin screws against knocking-out or unscrewing (see image).

S-dowel (S)

SIMONSWERK hinges are suitable for the use on burglar resistant doors. On several occasions respective evidence was provided on various door elements. Especially for applications according to DIN EN 1627 ff resistance class 3 and higher the use of hinges with S-dowels is recommended. Unlike reinforcing dowels, these dowels are welded to the hinge and care for a stabilization of the hinge and are capable to aborbe forces evolving from lever tools.

Custom-made designs

If you have special designs and none of the hinges featured on this website is suitable,

Reinforcing dowel (TZ)

Depending on the application area, design and door usage, the use of reinforcing dowels may be recommended to stabilise the hinge leaves.


Reinforcing dowels relieve the load on the fastening screws and stabilise the hinge leaves in the door leaf hole.Hinges with a height of 160 mm or 120 mm can be fitted with an additional reinforcing dowel in the centre screw hole. The reinforcing dowel is to be ordered separately.

With a material thickness of 3.0 mm or 3.5 mm, the reinforcing dowel will need to be 12 x 50 mm (M 5 screw). With a material thickness of 4.0 mm, use a reinforcing dowelof 12 x 60 mm (M 6 screw).



Overlap seal

For soundproof doors SIMONSWERK hinges are available as FD version (acoustic seal). These hinges are equipped with a groove for the continuous acoustic seal which does not need to be notched in the area of the hinge.

Plaster proof receivers

The plaster proof receivers are designed in a way that penetration of mortar is prevented. When using thin fluid backfill material, an additional insulation, e.g. with self-adhesive tape, is highly recommended.


The countersunk screw holes on SIMONSWERK heavy-duty hinges are designed for current German wood and chipboard screws (e.g. Spax). For use in practice we recommend screws according to DIN 7997 with a diameter of 4.5–5.0 mm. The countersunk holes of hinges made of 4 mm thick material are designed for a 6 mm screw diameter. The outer fastening screws for the covers of the VARIANT VX series should be at least 6 x 40 mm.


In general we recommend that screw holes are predrilled to ensure an optimum hold and thereby guarantee the stated load capacities.

When SIMONSWERK hinges are used on acetylated, acidic or otherwise modified timbers, care must be taken to select the corresponding fixing tools / fastening screws.

Hinge knuckle

VARIANT heavy-duty hinges are available in standard sizes of 160, 120 and 100 mm. The hinge knuckles of 100 and 120 mm hinges have a diameter of 20 mm. The hinge knuckles of 160 mm hinges are available with diameters 22.5 mm and 18 mm. They are complemented by 4 versions of the VARIANT Planum series with a diameter of 15 mm as slim, diameter-reduced alternative to design oriented door elements.

Finials for heavy-duty hinges VARIANT VX and VARIANT VN

SIMONSWERK designer door hinges are showpieces for sophisticated door appearance. Highly successful on interior and exterior doors, they also “wave the flag” in the heavyduty sector. With basic, soft and ZK finials, VARIANT VX and VN heavy-duty hinges in 100 mm and 160 mm sizes are also available in three outstanding designs in high-quality finishes.

Corrosion protection

When selecting a suitable finish or material, corrosion protection often plays a decisive role alongside the inclusive visual image of the door and hardware. In practice it is important to have both components working in harmony, to maintain a lasting, overall impression.


The essential materials and finishes of SIMONSWERK have been tested to DIN EN 1670:2007 and are classified as follows:

stainless steel Class 5
powder-coated Class 5
stainless steel look (aluminium) Class 4
top zinc Class 4
galvanised Class 3
satin chromed/F 1 Class 3
satin nickelled/F 2 Class 3

Salt spray test

Class 1 24 hours
Class 2 48 hours
Class 3 96 hours
Class 4 240 hours
Class 5 480 hours

All other finishes not listed here satisfy only optical requirements.

In damp rooms and on components exposed to the weather we suggest to use stainless steel hinges only, as this is the only material proved to be corrosion resistant over the long term.

When acetylated, acidic and other modified wood is used please pay attention to the corrosion resistance of the hinges. For this application SIMONSWERK recommends the use of stainless steel only.

In case of extremely high demands (such as coastal areas, indoor swimming pools, rooms with aggressive air etc.) even stainless steel can reach its limits. Continuous care prevents first signs of debris and flash rust. Cleaning intervals depend on usage and degree of soiling.

Specific material usage can improve the corrosion resistance of stainless steel. Please do not hesitate to contact us for further advice.

Finishes for heavy-duty hinges VARIANT VX and VARIANT VN

A wide range of finishes gives planners the ability to match the various hardware components such as handles and hinges. All heavy-duty hinges are available in the „galvanised“ version. Stainless steel hinges are also available with PVD coating. Other finishes, in RAL colours for example, are available on request.