Timber construction work at wildlife overpass completed


Over the course of several nights, carpenters assembled the 17.5-meter-long, 1.24-meter-high and 8-ton wooden girders. In the future, deer, foxes, deer and small mammals will walk across the new wildlife bridge near Neuenkirch. This pleases the environment in various ways. Because the wildlife bridge is a real CO₂ reservoir.

Timber construction work at wildlife overpass completed

In Neuenkirch, the Federal Roads Office (FEDRO) is building the second wildlife bridge with a wooden wildlife bridge with a wooden cover. This makes sense, because: "Building with wood corresponds to the spirit of the times," says Franz Koch, project manager of ASTRA (Zofingen branch) in an interview in an interview with the Neue Luzerner Zeitung. "This way, several tons of CO₂ stored can be stored."

The wildlife overpass in the canton of Lucerne has a width of 50 meters and a length of around 36 meters. The clear height is 4.80 meters. Around 2500 cubic meters, mostly spruce wood from the Entlebuch region, will be used for it. The fact that the wood was felled in the surrounding forests and processed in regional companies is a benefit for the local economy. The environment is also pleased. After all, from an ecological point of view, local wood is clearly more advantageous than wood from abroad.

Assembly work in Neuenkirch

Dispensing with steel and concrete in building and infrastructure construction is an important contribution to climate protection. After all, one cubic meter of reinforced concrete causes almost 500 kg of CO₂ emissions during its production, transport and disposal. Wood, on the other hand, stores around one ton of the greenhouse gas per cubic meter thanks to photosynthesis.

Of course, the production, transport and disposal of glulam also generate CO₂ emissions: One cubic meter of glulam for exterior use, made from Swiss wood, emits 190 kg of CO₂. If the wood comes from Hungary and is processed in Austria, emissions of 442 kg CO₂ can be expected. However, the cross-laminated timber solution is better than reinforced concrete - regardless of the origin of the wood. The bottom line is that 810 kg or 558 kg of the greenhouse gas are stored net per cubic meter of glulam used - reinforced concrete emits 434 kg of CO₂. The emission difference between reinforced concrete and glulam from Switzerland is 1244 CO₂ per cubic meter.

Graphic CO2 emissions

In the 2500 cubic meters after deduction of the emissions for transport and disposal, more than disposal, more than 2,000 tons of CO₂ are stored net. If the roof over the had been concreted over the highway, its manufacture would have polluted the environment with several hundreds of tons of the greenhouse gas.

In Langnau near Reiden a similarly large wildlife overpass is being built of concrete. This will allow a comparison in terms of maintenance and durability of the materials. will be possible.


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