Installation Guideline
Under Ballast Matsin Curved Sections

1. General Description
This Installation Guideline is an amendment to the”Guideline for the Installation of Under Ballast Mats,
including Storage” (to be retrieved from the Getznerwebsite).
All points of the main document are also valid here unlessdescribed differently in this document.
In order to achieve the best efficiency of the Under Ballast
Mats (UBM), they must be laid as closely as possible to thecurve contour during installation. As each mat is usually
cut rectangularly, the following method is helpful to enable
an efficient installation.

2. Installation
For a better understanding of the installation of UBM incurves, the illustrations show the differences in the curve
radius resulting in a smaller or bigger deviation from astraight line track.
The upper illustration shows a to-scale drawing of a 100m curve and the difference in curvature. In both drawings,four UBM (3 m x 1.5 m) were positioned in a linear way(without adjusting to the curve). The curvature in the 100 m
curve is five times stronger than in the wide 500 m curve
shown in the lower picture.
For this reason, the mats have to be laid in a way that
follows the curvature of the track. This is described in thefollowing steps in this document.

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Installation Guideline
Under Ballast Matsin Curved Sections

2.1 Installation of UBM
In order to lay and fit the mats the first step is to overlay
two mats (#1 and #2) towards the direction of the curve sothat they are touching at the outside top corner.
In the second step, the overlap of mat #1 is cut off using theedge of mat #2 as guidance. The cut wedge-shaped piece(#1.1) has to be pulled out from underneath, is rotated 180°
and positioned after mat #2 and used to direct the thirdpiece (#3) of mat towards the curve radius.
Depending on the radius further cutting of the next wedge
is necessary either right after it or only after another few
pieces of mat.
The narrower the curve, the more cutting is necessary. Gaps
between the mats that could be penetrated by stones must
be avoided. It is therefore extremely important to cover
the mat joints with the fleece strips provided by Getzner.
The fleece strips can be glued or welded with the Getzner
Weld-Jet device. The appropriate method depends on thegeneral conditions at construction site.

2.2 Alignment of UBM
This illustration shows a typical series of mat fittings in anarrow curve.
As mentioned in the description above this series can varydepending on the curve radius.

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Installation Guideline
Under Ballast Matsin Curved Sections

2.3 Final result
If all of the above mentioned steps are followed, the final
result should look like these two illustrations.

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3. Recycling

4. DisclaimerUnused UBM or pieces thereof can be recycled instandard plastics waste containers.

This guideline only serves to support the customeror his authorised specialist in the installation ofGetzner UBM. Getzner Werkstoffe draws the attention
to known design errors and problems. This guideline
was compiled with the 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 the proper installation of Getzner UBM and theresulting negative effects on the condition / qualityof Getzner UBM or its performance. This guideline ismerely intended as a strict recommendation and it isrecommended that the installation is carried out by aspecialist.
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.

At the end of the lifetime of the superstructure the UBM
can be mechanically removed from the substructure
and thermally recycled. All our materials are nonhazardous to the environment.

4AUSTRIA — Bürs GERMANY — Berlin — Munich — Stuttgart FRANCE — Lyon JORDAN — Amman JAPAN — Tokyo
INDIA — Pune CHINA — Beijing USA — Charlotte AUSTRALIA — Melbourne
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MA UBM in Curved Sections EN © Copyright Getzner Werkstoffe GmbH | 06-2020

Installation Guideline
Under Ballast Matsin Curved Sections