Technical information

The use of high-quality, certified materials and precise, innovative technologies are the foundation of all SIMONSWERK hinge systems.

Hinge positioning

Hinge positioning

Hinge distribution on timber entrance doors

Hinge distribution on timber entrance doors is not regulated by standards. SIMONSWERK recommends the distribution according to the illustration, as it has proven effective in practice. The hinge in the middle of the door prevents the door leaf from warping and maintains the sealing pressure in this area. SIMONSWERK recommends placing a hinge in the upper third for heavier loads. (see “Third hinge”)

Hinge positioning

Hinge distribution on PVCu entrance doors

Hinge distribution on PVCu entrance doors is not regulated by standards. SIMONSWERK recommends the distribution according to the figure, as it has proven effective in practice. The hinge in the middle of the door prevents the door leaf from warping and maintains the sealing pressure in this area. SIMONSWERK recommends placing a hinge in the upper third for heavier loads. (see “Third hinge”)

Hinge positioning

Hinge distribution on aluminium doors

Hinge distribution on aluminium doors is not regulated by standards. SIMONSWERK recommends the distribution according to the figure, as it has proven effective in practice. SIMONSWERK recommends placing a hinge in the upper third for heavier loads. (see “Third hinge”)

Hinge positioning

Hinge distribution on interior doors

Hinge reference line according to DIN 18268 for standardised doors as per DIN 18101

The hinge reference line (HRL) according to DIN 18268 is the defined line of a hinge which is at a certain distance from the top edge of the door rebate or the reference edge of the frame rebate. Only a precise definition of the hinge reference line for the top and bottom door hinge enables interaction between the door leaf, hinge and door frame. It is defined in DIN 18101 and allows industrially manufactured doors and frames to be produced separately. The hinge reference line as a dimension specification is independent of the hinge type and hinge manufacturer. Since a door leaf is always fixed to a frame with at least two hinges, there is a top hinge reference line (1st hinge reference line) and a bottom hinge reference line (2nd hinge reference line). The distance of the 1st hinge reference line is always 241 mm from the frame rebate and 237 mm to the top edge of the door rebate. The distance between the first and second hinge reference lines depends on the door leaf height (see table). The hinge reference line can be uniform within a product group, but it can also vary within a product group. The position of the hinge reference line for a third hinge is specified in DIN 18101 as 350 mm below the first hinge reference line.

Reference dimensions

Door leaf outer dimensions for rebated doors

Door leaf outer dimensions for flush-closing and rebate dimensions for rebated doors

Height in the frame rebate/lower edge of the top panel

Hinge spacings between the hinge reference lines for the top and bottom hinge

(Type dimensions for rebated doors)

(Type dimensions for flush-closing doors)

(top reference edge)


Hinge spacings also apply to deviating heights G according to the following limit value grid

Height B

Height D

Height G

Dimension X
± 0.5

Height G





1546 - 1670





1671 - 1795





1796 - 1920





1921 - 2045





2046 - 2170





2171 - 2295





2296 - 2420





2421 - 2545





2546 - 2670





2671 - 2795

Source: DIN 18101:2014

Load capacities

Basic information

When selecting or specifying a hinge, it is often the case that the load alone is assumed to be the door weight. However, the load on the hinge can often be many times greater than the door weight due to various factors.

Even considering these different criteria, an additional reserve should be always accounted for when selecting the hinge. Sufficiently dimensioned hinges should be used, especially in public buildings, where doors must be able to withstand special loads due to the frequency with which they are opened and strain that cannot always be accounted for (preschools, hospitals, etc.), even if this would not be necessary in terms of pure door weight. In  accordance with the SIMONSWERK installation instructions, a dimensionally accurate and correct stop is always required.

The following criteria must be taken into account when selecting a hinge in order to avoid damage:

  • place of use (residential building, public building, school, administrative, barracks, preschools, etc.)
  • element material type
  • opening frequency
  • door dimensions (e.g. extra wide)
  • arrangement of the hinges
  • installation of the hinges
  • outwards opening doors (vestibule)
  • door stops
  • door closers
  • rotary wing drive
  • closing sequence control
  • wall reveals
Load capacities

Extra wide doors

SIMONSWERK heavy-duty hinges are generally intended for the specified load capacities. Please note that the load capacities decrease from the reference dimension while the hinge spacing remains the same.

Load capacities

Third hinge

In addition to the above-mentioned factors, the use of a third hinge can also significantly influence the load capacity. In practice, a third hinge is often placed in the middle between the outer hinges to meet the visual requirements and ensure the sealing pressure in the middle of the door.

However, under certain circumstances, it may be useful or necessary to provide additional support for the upper hinge where the main tensile forces occur. For example, this could be the case with extra-wide doors where additional forces are present due to the leveraging effect. In such cases, the third hinge should be placed in the upper third, as this is the only way to positively influence the load capacity. The standard for interior doors (DIN 18101) require a third 350 mm hinge to be used below the upper (based on the upper hinge reference line). SIMONSWERK recommends reducing this dimension (to a minimum of 250 mm) for non-standardised elements (e.g. front doors) depending on the knuckle length.

A third hinge does not necessarily lead to an increase in the specified load capacity. It has a supporting effect when there is additional strain, e.g. when a door closer is used or in the event of a high number of users, etc.

Load capacities

Door closers, opening limiters, latching function

When using top door closers and opening limiters, SIMONSWERK recommends installing a third hinge in the upper third of the door (see “Third hinge”). Correctly adjusting the closer is a basic prerequisite for long-term flawless functioning.

A locking device adds an unpredictable additional load on the hinge technology. When using a component with a latching-locking function, it is essential to ensure sufficient safety measures for the hinges are taken into account.

The use of door closing systems fitted laterally in the rebate must be inspected on a case-by-case basis due to the unfavourable angle of rotation and the resulting force effect.

Load capacities

Closing sequence control

When implementing a closing sequence control for double-leaf doors, it is crucial to ensure that a damped locking device is used for the active leaf. This prevents the forces from being transferred 1:1 to the hinges. In this case, SIMONSWERK recommends placing a third hinge in the upper third (see “Third hinge”).

Load capacities

High frequencies

SIMONSWERK recommends pairing the hinges at the top for doors that are used very frequently. In this case, SIMONSWERK recommends placing a hinge in the upper third (see “Third hinge”).

Load capacities

Door drives

When using a side-hung leaf drive, SIMONSWERK recommends installing a total of four hinges in pairs at the top and bottom, respectively. The distance between the hinge pairs should not exceed 350 mm (see “Third hinge”).

Load capacities

Door stops

If a door stop has to be used, it should either be wall-mounted or placed on the floor approx. 75% of the door width away from the hinge axis in the direction of the lock.

Load capacities

Wall reveals

Factors such as protruding wall reveals or the like are generally not to be evaluated due to the leverage effect that can occur as a result of the door overturning. In such cases, the dimensions of the doors can quickly cause to damage to the fastening, hinge or the like.

Load capacities

Floor seal

When using a floor seal, it should be properly adjusted in order to avoid unnecessary additional strain on the bottom hinge. In particular, preventing crushing caused by the ‘trigger’ in the rebate area and disproportionately strong pressure of the seal against the floor is critical.

Load capacities

Frame fastening

In order to maximise the load capacity of a door hinge, it is essential that all components are installed properly and professionally. So particular attention must be paid to the fastening of the door element to the wall. Special care should be taken when attaching the frame to the wall or partition frame, especially when dealing with surrounding frames, which may be made of steel, aluminium or timber, as they are often less stable. Simply foaming this area is not recommended for door weights > 60 kg. Instead, a force-fit connection must be established via a screw or dowel connection through the hinge holder, or max. 100 mm from the outer edge of the hinges.

Load capacities

Floor clearance

Adequate clearance from the floor must be ensured over the entire opening angle of the door. For interior doors, DIN 18101 specifies a distance of 7 mm as the nominal dimension for the floor clearance. In the case of uneven or sloping floors, it may be necessary to adjust the clearance accordingly. A slight sagging of the door over the entire opening angle is to be regarded as normal from a technical point of view, depending on the door width, door weight, etc.


The points laid out here are merely guidelines. In practice, considering factors such as the door’s characteristics, frequency of use, location, etc., it may be beneficial to take into account these aspects even with narrow door widths. Each application must be considered individually. In each case, care should be taken to ensure that the hinges are sufficiently dimensioned to account for the surrounding factors.

Fitting features

Fitting features

Maintenance-free slide bearings

Maintenance-free slide bearings are made of a special bearing material with self-lubricating properties. The wear-resistant bearings ensure outstanding operational performance and optimal absorption of axial and radial forces. Hinges fitted with maintenance-free slide bearings must not be applied with oil or lubricant. This may damage bearings and cause undesirable noise.

Fitting features

Security pin

For use on outwards opening doors, all SIMONSWERK hinges with a continuous hinge pin are also available with a security pin on request. The hinge pins or pin screws are secured against being knocked out or unscrewed (see illustration) using various techniques depending on the product range.

Fitting features

Reinforcing dowels

Depending on the area of application, construction and load on the door, it is recommended to consider using support pins to strengthen the hinge flaps. Reinforcing dowels relieve the fastening screws and strengthen the hinge flap in the door leaf routing.

Hinges with a height of 160 mm or 120 mm can be fitted with an additional support pin in the middle screw hole. The reinforcing dowel must be ordered separately.

A 12 x 50 mm reinforcing dowel (M 5 screw) is required for material thicknesses of 3.0 mm and 3.5 mm. A 12 x 60 mm reinforcing dowel (M 6 screw) is required for a material thickness of 4.0 mm.

Fitting features


SIMONSWERK hinges are suitable for use on burglar-resistant doors, as proven several times on various door elements. It is recommended to use hinges with S-pins, especially from resistance class 3 and higher of DIN EN 1627 ff. Unlike the pivots welded onto reinforcing dowels, these hinges help to strengthen as well as absorb force when strain is applied by lifting tools.

Fitting features

Overlap seals

SIMONSWERK hinges are also available in an FD version (FD = leaf seal) for sound-insulated doors with an overlap seal in the door leaf. In this version, the hinges have a receiving groove for the continuous overlap seal. This does not have to be disengaged in the belt area.

Fitting features

Plaster-proof receivers

The plaster-proof receivers are designed to prevent plaster from entering. When using low-viscosity backfill materials, it is recommended to use an additional sealing means, e.g. with self-adhesive tape.

Fitting features

Procedure for special designs

If none of hinges from our range are suitable for a particular design, please send us a dimensioned cross-sectional drawing for the design of the component in question, if possible on a scale of 1:1 and ideally in CAD format, e.g. DXF. SIMONSWERK will promptly check whether there is a hinge that can be modified accordingly to meet the requirements.

Explanation of
hinge designations


Because SIMONSWERK’s hinges cover so many possibilities and areas of application, there are also many product descriptions. To make your life easier, you’ll find a list of the most important descriptions and abbreviations along with their explanations.


Abbreviation/suffix Designation/explanation


Scew-on frame part


Material Bronze


convenient adjustment in door leaf


permanent energy transfer feature


stainless steel, matt brushed


acoustic seal


with integratable intumescent kit


lateral adjustment


recessed frame


casing frame


timber aluminium


height adjustment






comes with security pin


dowel offset upwards


dowel offset downwards


includes elegant hinge knuckle (15 mm)


round tip








steel frame


reinforcing dowel


retrofit hinge


retrofit hinge on block frame


retrofit hinge on casing frame


welded hinge knuckle for extremely high load capacities




includes closed frame part windows for burglar resistance


decorative head


Adjustment instructions

Adjustment instructions


All adjustments made to hinges require due care. The specified adjustment paths must be strictly adhered to. If the adjustment is overtightened, the system will generally only function to a limited extent. Please ensure that any noticeable resistance is not overcome by applying additional force.

Adjustment instructions

Zero position

SIMONSWERK hinges are pre-assembled in a zero position at the factory. After installing and making any necessary adjustments, all clamping screws must be firmly tightened.

Adjustment instructions


Adjustments must be made with a proper tool to avoid overtightening the screw inserts, e.g. Allen keys with ball heads are not suitable.

Adjustment instructions

Convenient adjustment

When dealing heavy doors and doors with unfavourable height/side ratios, the adjustment technology must be supported by relieving the load on the door leaf, even with convenient adjustment.

Adjustment instructions


All adjustments must be made free of stress, both within the hinge and in relation to the whole door. This means that adjustments must be made evenly so that the hinges are aligned both individually, and altogether on the door.


When selecting the right finish or material, it’s not just the overall appearance of the door and fitting that matters, as corrosion protection often plays a critical part too. In practice, it’s important to harmonise both components in order to maintain the overall aesthetic over the long term.

SIMONSWERK’s main materials and finishes are tested in accordance with the specifications of DIN EN 1670:2007 and are classified as follows:

Stainless steel

Category 5
Coloured PVCu-coated Category 5
Stainless steel look (aluminium) Category 4
Top zinc Category 4
Galvanised Category 3
Matt-chromed Category 3
Matt-nickel-plated Category 3


Salt spray testing
Category 1 24 hours
Category 2 48 hours
Category 3 96 hours
Category 4 240 hours
Category 5 480 hours


All other finishes not listed are for visual requirements only.
We recommend only using hinges made of stainless steel for use in damp and wet rooms (also as defined in RAL-RG 426 Part 3) and on components that are exposed to the outside weather, as only this material remains corrosion-resistant in the long term.
Stainless steel can reach its limits in normal environmental conditions as well as in extreme conditions (coastal regions, indoor swimming pools, rooms with aggressive air, etc.). Regular maintenance prevents the build-up of deposits and flash rust. The cleaning intervals depend on degree of soiling. Tests have shown that brands such as Cillit, Enablitz, Stahlfix and 3M have good results in terms of cleaning effect, preservation and ease of application.

Under no circumstances should steel wool, steel brushes or the like be used for cleaning, as such aids damage the protective finish and allow extraneous rust to build up due to abrasion.
In the case of acetylated, acidic and other modified woods, care must be taken to ensure that the fittings are sufficiently corrosion-resistant. SIMONSWERK recommends using only stainless steel for this application.The corrosion resistance of stainless steel can be improved through a purposefully selective use of materials. We will be happy to advise you.