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Aesthetic & Road Safety: the concept of Steel Backed
Timber guardrails
www.tertu.com www.passco.pl Eric ROUSSEAU Area Sales Manager [email protected] + 33626134188 February 2015
1. Introduction
2. A little of history until now 3. Why using wood material in road infrastructures ? 4. The mixed wood and steel guardrails worldwide
IINDEX
IINTRODUCTION
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Which kind of constructions do we want in Poland?
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Which kind of constructions do we want in Poland?
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In certain situations, the traditional steel crash barrier appears as a negative factor, damaging
the beauty of the landscape
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Different solutions have been experienced since the 1930’s, initially in the U.S.A , then in Europe : among them, crash barriers in Corten steel and
more frequently Wooden Guardrails
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CCorten Steel guardrail
A little of history
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The very first wooden barriers (“rustic rails”) have been installed in the U.S.A. around the Thirties in some
National and States Parks
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Austria 2014
Finland 2015
After World War II, crashworthy systems meeting the requirements of new standards NCHRP 230 and later
350 have been designed and tested
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The original concept of wooden round log crash barrier was born in France in 1984 (Eynard patent).
Entirely in wood, it has been tested at 80 km/h with a 1200 kg vehicle
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How the modern Mixed Wood & Steel Guardrails work?
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• Energy absorption properties of wood
• Reinforcement with
galvanised steel • Aesthetic
Mixed Wood & Steel Guardrails in accordance with CE marking or American
Norms
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• In 1996, the first Mixed Wood & Steel system has been crash tested according to the European Standard, EN1317 at containment level N2 (110 km/h, 1500 kg, 20°)
• In 1999, a mixed wood and steel crash barrier designed by French company Tertu has been tested in California at 100 km/h with a 2000 kg pick up truck (NCHRP 350 TL-3)
• � Performances with other guardrails can be compared
• Norms are required in the global markets
Why introduce the wood material in Road
Safety?
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1. In modern times, wood has always been considered as a noble and aesthetic material,
symbol of nature, beauty and health
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2 - Wood is a renewable material - The wood must come from sustainable managed forests
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FForest Stewardship Council
Program for the Endorsement of Forest Certification
3- The ecological balance of a wooden guardrail (CO2 stocking) stands for an environmental friendly system
Eco-friendly guardrails
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Energy required to manufacture the materials below:
Materials Energy required to manufacture 1 Ton
in Joules x 109
Equivalent Tons of oil
Steel 60 1,5
Concrete 4 0,1
Wood 1 0,025
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4- Wood is durable when pressure-treated
5 - Elasticity and flexibility of the wood have been evaluated through static and dynamic testing
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MMixed Wood & Steel
Guardrails
worldwide
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T22 Lithuania
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T18 Netherlands
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New-Caledonia, Pacific Ocean
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Sant-Barths
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T40 BP Italy
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T40 Norway
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T40 BP Estonia (Sulu Bridge)
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T40 Border Belgium - France
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T40 BP Italy
