Installation Guideline
Mass-Spring Systems
Point Bearings
1. Transport and Storage
The Getzner products (Getzner Point Bearings) for massspring systems (MSS) must always be transported in original
packaging. The plastic wrapping protects the Getzner MSS
Point Bearings from environmental impacts.
Attention has to be paid during transportation to avoiddamages. Damaged packaging shall be immediately
repaired (using for example plastic foil and adhesive tape).
Getzner MSS Point Bearings are delivered stacked onpallets.
For optimal preservation, it is advisable to store the item inits original packaging within a moisture-free environment.
Additionally, to maintain its condition, shielding it fromdirect sunlight is recommended.
The elastic mats should not be stored at temperatures
below -20 °C and above +50 °C.

2. General Description
Getzner MSS - regardless of the variant - are high-tech
polyurethane materials that can withstand extreme staticand dynamic loads. They exhibit excellent resistanceagainst all chemical substances used in railway operations.
Getzner MSS passed all serviceability tests in accordancewith DIN 45673-7:2010.
Although MSS from Getzner are tough and hard-wearing,some guidance for simple and efficient handling shallbe taken into account in order to enable a hassle-freeinstallation and the highest possible performance.
Attention: Please note that in case of bonding the bearings
with Diisocyanate containing bonding agents, staff
needs to be trained and certified conform EU legislation
2020/1149. More information you can find via link https://
safeusediisocyanates.eu/.

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Installation Guideline
Mass-Spring Systems
Point Bearings
3. Installation of Getzner Point Bearings
3.1 Preparation of the first stage concrete
The substructure has to be clean and dry, frost-free as well
as free of depressions and sharp-edged elevations. Loose
objects, e. g. stones, have to be removed with appropriatetools.
The surface of the first stage concrete has to be smooth toenable easy movement of point bearings during positioning.

3.2 Marking of distance spacers and manholes
Carefully follow the design plans and mark the positionsof manholes and distance spacers on first stage concrete.

3.3 Selection and preparation of shuttering elements
Prepare the shuttering elements according to theshuttering plan and materials' list.
— Wooden elements for shuttering manholes— Distance spacer e. g. metal, wooden or rubber plates (seefollowing chapter)— De-bonding foils to ensure de-bonding between firstconcrete and concrete slab after curing process

3.4 Placing of distance spacers for bearings
To create pockets on the bottom side and to enable thecorrect spacing for bearings within the concrete slab,
distance spacers have to be placed and glued onto firststage concrete. The distance spacers create a hollow
space that allows insertion of the point bearings andensures the right positioning of the bearings. Additional
blind holes reduce the lift height of the jacks when the slab
is lifted and therefore avoid too high bending moments on
the slab when lifted up.
Recommended dimensions for distance spacers:— Thickness: 7.5 - 40 mm— Contour: outer contour of spacers ~ 50 - 100 mm bigger
than the contour of MSS point bearings
The exact dimensions are to be defined according toinstallation plans and design drawings.

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Installation Guideline
Mass-Spring Systems
Point Bearings

3.5 Attaching of the de-bonding layer
An appropriate PE-based de-bonding layer (specs canbe sent upon request) has to be laid onto the first stage
concrete. This layer acts as a separation layer to ensure
the concrete slab can be lifted up after curing with the
purpose to integrate the point bearings afterward.

3.6 Installation of the shuttering elements for themanholes
On the before clearly marked positions for manholes thewooden shuttering elements have to be placed.
Pockets for the hydraulic jacks are important for the later
lifting process and are also mandatory to shutter.

3.7 Installation of the reinforcement formwork andrails
The reinforcement bars have to be installed according to
the reinforcement plans on top of the de-bonding layer. All
areas around distance spacers and the manholes have to
be worked out properly and according to reinforcementdrawings. If required and in design foreseen, rail track andfastening systems have to be fixed.
During the entire working step of reinforcement and rail
track fixation, the general track contractor is clearlyadvised for careful handling to avoid any damages anddisplacements of the de-bonding foil.

3.8 Concreting the slab
Pouring the liquid concrete, compacting and levelling are
the next steps to produce a continuous slab with arecommended length of 60 m - 80 m. The exact length is tobe defined according to the final design drawings.

3.9 Finishing process of concrete slab
After 28 days of concrete curing time of slab, the shuttering
elements have to be removed and manholes can be cleaned
up. Finalized manholes are ready to be accessible for thenext working steps.

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Installation Guideline
Mass-Spring Systems
Point Bearings

3.10 Preparing devices and tools for installation ofpoint bearings— Hydraulic jack with the stroke of approx. 50 mm and20 tons capacity (e. g. Enapac RCH Holl-O-cylinder);Exact specification of hydraulic jacks will be provided
based on the final design and upon request— Hydraulic power unit
— Hydraulic hoses— Levelling shims 100 mm x 1 00 mm with 1, 2, 5 mm
thickness, metal— Vacuum cleaner— Assembling jig (shaped similar to point bearing)— Dial gauges to measure the vertical movement of the slab
— Lamps— Endoscopes equipped with cameras— Installation plan for point bearings— Metal scrapers to remove the distance spacers— Adhesive for distance spacers

3.11 Preparation and placing of hydraulic cylinder
The cylinders of the hydraulic jacks have to be inserted
and connected with hoses to the hydraulic power unit.
Gaps between hydraulic cylinder and concrete slab due
to unevenness of surface have to be filled with levellingshims. This ensures uniform load distribution and proper
force distribution during lifting.
For the convenience of levelling and positioning of rails,
20 - 25 m rigid section (non-padded) on each side of thepoint bearing section should not be casted.

3.12 Lifting up the slab
After starting the hydraulic power unit and opening thevalves of hoses the hydraulic cylinders will lift up the slab
slowly. Make sure the lifting speed is synchronised. As
soon as the final height is reached insert levelling shims
as a safety buffer.

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Mass-Spring Systems
Point Bearings

3.13 Insertion of point bearings
Assembling jig (shaped similar to point bearing) allows
proper positioning of the bearings underneath the liftedslab. Before placing point bearings, the distance spacers
are to be removed with the help of a metal scrapper.
Endoscopes with cameras enable the checking of thecorrect position of the bearings.

3.14 Lowering of the slab
After the position of point bearing is adjusted, the levellingshims as safety buffers can be removed. Release thepressure from the hydraulic system to lower the slab.
Repeat the before described working steps for each
60 m - 80 m slab section.
Each slab with length of 60 - 80 m may have to beconnected to each other using shear connectors (dowels)
depending on the final design requirements.
After lowering the slab final adjustment in height of therail can be made by the track contractor to achieve thedesired rail level.

3.15 Remarks
A) In case final design requires prevention of lateral
movement of a slab on point bearings, the “lateral bearings”
need to be provided as per the specifications and design
given by designer.
B) Utmost care to be taken during the construction andduring the operations that any debris is not falling into thegap between the slab on point bearing and the tunnel
invert. Suitable arrangement of sealing / closing this gap
should be made wherever needed.
C) Information on project specific documents, tools,consumables, construction sequence and materials will be
provided based on final design.

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5Installation Guideline
Mass-Spring Systems
Point Bearings

5. Recycling
Any waste generated during installation can be recycled
in standard waste containers.
At the end of the lifetime of the superstructure theGetzner MSS can be removed from the substructure
mechanically and recycled thermally. All our materials
are non-hazardous to the environment.

This guideline only serves to support the customer or hisauthorised specialist in the installation of Getzner MSS.
Getzner Werkstoffe draws the attention to known design
errors and problems. This guideline was compiled withthe utmost care based on Getzner’s current knowledge.
Getzner Werkstoffe assumes no warranty or liability forthe accuracy, completeness, topicality or quality of thisguideline. The customer is not entitled to any claims
whatsoever arising from the use of this guideline. In
particular, Getzner Werkstoffe is not responsible for theproper installation of Getzner MSS and the resulting
negative effects on the condition / quality of Getzner MSS
or its performance. This guideline is merely intended asa strict recommendation and it is recommended that theinstallation is carried out by a specialist.
All other rights are reserved. In particular, all texts,photos, graphics, etc. are subject to copyright and areintended for business use solely. Additionally, sharing
with unauthorised third parties is expressly prohibited.

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Installation Guideline Point Bearings MSS EN © Copyright Getzner Werkstoffe GmbH | 02-2024

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