DeutschesInstitutfürBautechnik

National technical approval / General construction technique permit
Approval No.:

Z-16.8-467
Applicant:Getzner Werkstoffe GmbHValidity:
From: December 1st, 2021
Until: December 1st, 2026

Controlled item:
Getzner Sylomer®

The aforementioned item is herewith granted a general construction technique permit.
This Notice consists of eight pages.
The subject was first granted a national technical approval on November 17th, 2016.

Translation of the original German version, not verified by the Deutsches Institut für Bautechnik

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Page 2 of 8IGENERAL PROVISIONS

1This Notice is evidence of the usability/applicability of the controlled item according to the federal building
codes.

2This Notice does not replace the statutory permits, approvals and certificates that are required whencarrying out building projects.

3This Notice is issued without prejudice to the rights of third parties, in particular private property rights.

4Notwithstanding the further regulations set out under "Particular Provisions", copies of this Notice are tobe made available to the installer/user of the controlled item. The installer/user of the controlled item ishereby also advised that a copy of this Notice must be provided at the item's place of use or installation.
If requested, copies must be provided to the relevant authorities.

5This Notice may only be reproduced in its entirety. The publication of excerpts requires the agreement of
the Deutsches Institut für Bautechnik (DIBt). Text and drawings in promotional material must notcontradict this Notice. Translations of this document must include the disclaimer, "Vom Deutschen Institutfür Bautechnik nicht geprüfte Übersetzung der deutschen Originalfassung" (translation of the originalGerman version, not verified by the DIBt).

6This Notice is valid until revoked. Its provisions may be complemented or amended retrospectively,
especially in the light of new technical developments.

7

This Notice is based on the statements and documents submitted by the applicant. Any changes to theseunderlying assumptions are not covered by this Notice and must be notified to the Deutsches Institut fürBautechnik without delay.

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PARTICULAR PROVISIONS

1

Controlled item and area of use/application

1.1

Approved item
"Getzner Sylomer", the approved item, is a compact, unreinforced elastomer bearing made ofpolyurethane (PU). It is used for the absorption of forces and deformation perpendicular to the plane ofthe bearing.
The bearings must be rectangular, point, strip or square in shape.
Various coloured markings are used to distinguish one type of bearing from another.

1.2

Subject of permit
This approval concerns the planning, design, and implementation of elastomer bearings for building
structures. The components adjoining the bearing must be made of steel, concrete or wood. The use offoils above or below the bearing is not permitted. The elastomer bearings can be used at temperaturesof between -25°C and 50°C. For brief, recurring periods of less than 8 hours, the bearings may be
exposed to temperatures of up to +70°C.
Although elastomer bearings can absorb shear deformation, they must not be used for the systematic
removal of permanent external shear forces.
The bearing is supplied without any holes.
An assessment of its vibration isolation properties is not covered by this approval.

2Provisions for construction products2.1

Properties and composition

2.1.1

Dimensions
Point and strip bearings employed in multi-layer configurations must be bonded together. Bonding is notnecessary in the case of multi-layer surface bearings. Only bearings of the same type may be layered on
top of each other.
The following conditions with regard to the bearing dimensions must be met:
Thickness of a bearing in a single-layer configuration/thickness of an elastomer layer:t = 12.5 mm to 25 mm
In the case of bearings:
amax = 1500 mm
In the case of point bearings:t ≤ a/5
For bearings whose shorter side is less than a ≤ 500 mm:
t ≥ a/30
In the case of rectangular bearings:a ≥ 70 mm, b ≥ 70 mm
where:tthickness of the unloaded bearing

ashorter bearing sideblonger bearing side

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With regard to the tolerances to be observed:
Length Class L3 as per DIN ISO 3302-1:2016
WidthClass L3 as per DIN ISO 3302-1:2016

Thickness
2.1.2

Class EC3 as per DIN ISO 3302-1:2016

Materials
The physical characteristics, chemical composition and material properties of the bearing and adhesive
are held by the Deutsches Institut für Bautechnik.
Evidence of the properties of the original materials and adhesive used is to be provided by means of aninspection document 3.1 as per DIN EN 10204:2005-01.

2.2

Production, transport and labelling

2.2.1

Production, transport
The bearings are to be produced by a foaming process in the form of mats or rolls and then cut to size.
Detailed information regarding the production process is held by the Deutsches Institut für Bautechnik.
The manufacturer's instructions regarding the transport and installation of the bearings must be observed.
Should any bonding have to be done on site, this must be carried out in accordance with thedocumentation held by the Deutsches Institut für Bautechnik. The bonding procedure is to bedocumented.

2.2.2

Labelling
The manufacturer is to label the construction product or its delivery note with the mark of conformity (“Üsign”) according to the applicable mark of conformity regulations. Labelling may only take place if therequirements set out in section 2.3 have been satisfied. The label must be applied to the mats or rolls
produced according to section 2.2.1 permanently and continuously, with any necessary changes("mutatis mutandis").

2.3

Certificate of compliance2.3.1

GeneralA certificate of compliance by the manufacturer on the basis of factory-internal production checks and acertificate of compliance issued by a recognised certification body, together with a regular third-party
inspection, including an initial test of the bearing by a recognised inspection body in accordance with theprovisions set out below, must be provided by every production plant to confirm that the bearing complies
with the provisions of this national technical approval.
For the purposes of issuing the certificate of compliance and carrying out the third-party inspection,including the necessary product tests, the manufacturer of the bearings must employ the services of arecognised certification body and a recognised inspection body.
The manufacturer is to make the declaration of compliance by labelling the construction products withthe mark of conformity (“Ü-sign”) and indicating their intended use. If this should not be possible in any
particular instance, the package slip accompanying the bearing must be marked with the mark ofconformity (“Ü-sign”) according to the mark of conformity regulations.
For information purposes, the certification body is to provide the Deutsches Institut für Bautechnik with acopy of the certificate of compliance it issued.
The Deutsches Institut für Bautechnik must also be given a copy of the initial test report.

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Factory-internal production checks
Every production plant is to establish and carry out internal production checks. By factory-internal
production checks are meant the continuous monitoring by the manufacturer of the production process.
This monitoring process is designed to ensure that the construction products produced by themanufacturer comply with the provisions of this national technical approval.
The factory-internal production checks must take place according to the testing plan held by theDeutsches Institut für Bautechnik.
The results of the factory-internal production checks are to be recorded and evaluated. As a minimum
requirement, the records must contain the following information:–

Designation of the construction product and/or its original material and constituent parts,–

Type of check or inspection,–

Date of manufacture and testing of the construction product and/or its original material or constituent
parts,–Results of the checks and tests and, where applicable, comparison with the requirements,–

Signature of the individual responsible for the factory-internal production checks.

The records are to be retained for at least five years and submitted to the inspection body responsible
for the third-party inspection. They are to be submitted on request to the Deutsches Institut für Bautechnik
and the appropriate highest building authority.
If the inspection result is unsatisfactory, the manufacturer is to implement the necessary corrective
actions without delay. Construction products that do not meet the requirements are to be dealt with insuch a way that any possibility of mistaking them for approved products is excluded. Assuming it istechnically possible and required as evidence that the deficiency has been remedied, the relevant test is
to be repeated as soon as the corrective actions have been implemented.
2.3.3

Third-party inspection
The factory-internal production checks carried out in every production plant and the plant itself are to beaudited regularly, and at least twice a year, by a third-party inspection body. The results of the testscarried out by the manufacturer in accordance with section 2.3.2 are to be statistically evaluated.
The third-party inspection is to include an initial test of the bearing as specified in the testing plan. Thesampling and testing procedures are the responsibility of the respective inspection body. The scope andfrequency of the third-party inspection are to be found in the testing plan held by the Deutsches Institut
für Bautechnik.
The results of the certification and third-party inspection are to be retained for at least five years. The
certification body and/or inspection body shall, on request, submit the results to the Deutsches Institut fürBautechnik and the appropriate highest building authority.

3Provisions for planning, design and implementation

3.1

Planning
The planning is governed by the technical building regulations, unless stated otherwise below. Bearings
can be installed in a single-layer or multi-layer configuration. The dimension constraints specified in
section 2.1.1 must be observed. The bearing dimensions are to be found in the specifications provided
by the structural engineer and in the installation plans.
A static calculation is to be carried out in every case to verify the structural safety of the bearings at loadbearing capacity limits for all critical dimensioning situations and load cases.
The verification concept set out in DIN EN 1990:2010-12 in conjunction with the National Annex applies.
The bearings may only be used for static or quasi-static loaded components.
The type, dimensions and arrangement of the bearings are derived from the proof of stability. Once thebearings have been selected, and insofar as required by the installation situation, an installation plan is
to be drawn up showing the exact position of the bearings within the structural layout.
Installation is to take place in accordance with the manufacturer's instructions.

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3.2

DesignThe design is governed by the technical building regulations, unless stated otherwise below.
The possible load-case combinations are to be found in DIN EN 1990:2010-12.
The design values of the effect of the actions (stresses) Ed are to be determined from the characteristic
values of the actions, taking into account the partial safety factor
out in the technical building regulations.

and the combination values ᴪ as set

The following calculations must be provided at load-bearing capacity limits:

𝐸⊥𝑑≤1𝑅⊥𝑑where:𝐸⊥𝑑load on bearing perpendicular to the plane of the bearing [N/mm²]𝑅⊥𝑑design value of associated load-bearing capacity of bearing [N/mm2] perpendicular to the planeof the bearing as a function of shape factor S at a linear compression of 𝜀 = 40% as per Table
1 (40% linear compression is a failure criterion)

S

shape factor for rectangular cross sections: 𝑆 =𝑎∙𝑏2∙t(𝑎+𝑏)

where a, b, t as per section 2.1.1
Table 1: Load-bearing capacity of the bearing when subjected to a load perpendicular to the plane of thebearing
SR
11SR
28SR
220SR12000.51)

0.01710.03930.30701.05901.0

0.01730.04080.37101.97101.5

0.01740.04180.40202.40902.0

0.01750.04250.42302.70402.5

0.01750.04280.43402.87303.0

0.01750.04310.44202.97303.5

0.01750.04340.44603.03604.0

0.01750.04370.44903.07604.5

0.01750.04390.45103.10505.0

0.01750.04420.45303.12505.5

0.01750.04430.45303.13906.0

0.01750.04440.45403.1500≥ 6.0

0.01750.04440.45403.1500Design value of load-bearing capacity R⊥d [N/mm2]

Standard type

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Shapefactor

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The interaction with the load-bearing behaviour of the bearing must be considered when designing thecomponents adjacent to the bearing. It should be noted that putting a load on an elastomer bearing
produces a load concentration. The distortion of elastomer bearings causes eccentricity in the loadconcentration, which generates a self-aligning torque.
When determining the effects on the structure as a whole, the linear compression of the bearing is to beconsidered a product-specific value. Should the contact surfaces of the adjacent components not exhibit
plane-parallelism, e.g. as a result of manufacturing and installation tolerances, this must be taken into
account in the design of the bearing. As long as more detailed information is not forthcoming, the rotation
angle of the adjacent components must be calculated by the addition of the following factors:–Oblique angle with 10 ‰–Unevenness with 0.625 mm/a [‰]wherea in [mm]If the adjacent components are made of steel or in-situ concrete, the unevenness figure can be halved.
In the event of distortion across two sides of a bearing that are perpendicular to each other, a component
representing angular distortion must be added proportionally to the respective design values.
Positional stability must be verified.
For the standard point bearings shown in Table 1a, the maximum twist for a rotation parallel to the centre
line of side b is calculated as follows:∝𝑏,𝑚𝑎𝑥 =𝑡
≤ 54‰
6∙a

where

∝𝑏,𝑚𝑎𝑥 maximum torsion angle for a rotation parallel to the centre line of side bt

thickness of the unloaded bearing in mm

ashorter bearing side in mm

The formula is used analogously to calculate the maximum torsion angle parallel to the centre line of sidea. In the structural design, evidence must be provided to show that should maximum linear compression
occur at the same time as maximum torsion, contact with the edges of adjoining components will beavoided.
The following limit condition must be observed if a torsional load is applied on two axes:
2∝Resultierende = √∝𝑎,𝑚𝑎𝑥 2 +∝𝑏,𝑚𝑎𝑥 ≤ 54‰
In the case of point and strip bearings, the tensile force generated in the adjoining components due tothe fact that the non-reinforced elastomer bearing cannot expand is to be calculated and absorbed bymeans of appropriate measures.
The tensile force affecting the adjacent components as a result of the centric load applied to the bearing
is calculated as follows:

𝑍a = 1,5 ∙ 𝐸⊥,𝑑 ∙ 𝑎 ∙ 𝑡𝑍b = 1,5 ∙ 𝐸⊥,𝑑 ∙ 𝑏 ∙ 𝑡where:

𝑍atensile force perpendicular to the shorter side of the bearing a [N]𝑍btensile force perpendicular to the longer side of the bearing b [N]Z-16.8-467

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The extension rate of the bearing depends on its format. It must be taken into account when designing
the supporting framework (edge distances, etc.). Contact the manufacturer in advance and ask them toprovide this figure.
Do not prevent the systematic deformation of the lateral surfaces of the bearing.
3.3

Implementation
The implementation is governed by the technical building regulations, unless stated otherwise below.
The bearings must be stored in a dry place and installed in a dry state. Store rolls of material upright.
Store adhesive according to the manufacturer's instructions. Protect the bearings from direct sunlight.
The subsoil must be smooth and level. To protect the bearing, carefully deburr the supporting surfaces.
Avoid cavities in adjacent concrete surfaces. If necessary, use a bed of mortar to even out any height
differences. The adjoining components must be compatible with the material used in the bearing. Ensurethat the bearing and the adjoining components are not damaged by any chemical or physical effects andare kept free of contamination. The surfaces of adjacent components must be clean and free of any snow,
ice, grease or separating agent. Standing water must be avoided. The manufacturer's installation
instructions must be observed.
The construction company shall confirm in writing according to paras. 16a section 5, 21 section 2 MBO
that the bearing has been installed in accordance with the provisions of the national technical approval
covered by this Notice.

4Provisions for use, maintenance and servicing
The bearings are to be installed such that they require no maintenance.

Andreas SchultHead of DivisionZ-16.8-467

Certified

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