© Michel Denancé

La Troche Footbridge

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City, Country Saclay, France
Year 2018–2022
Client Établissement public d'aménagement Paris-Saclay
Architect Bassinet Turquin Paysage
Services Structural engineering
Facts Length: 21.6 m

The development project consists of creating a direct and practicable path through the E. Chanlon forest park, close to the former sandstone quarry which has become a climbing site. From Corbeville street to the country road n°60 of Corbeville, the walker is accompanied in his crossing by a continuous steel handrail, in the manner of an "Ariadne's thread".

The footbridge is 21.6m long and 2m wide. The finished level of the deck is 149.30 NGF. The lowest level of the valley is approximately 144.80 NGF. The maximum height under the deck is therefore 4.50m. It is made up of steel posts that support the prefabricated concrete deck and also serve as a guardrail post. The guardrail consists of a steel tube handrail fixed to the posts and a stainless steel mesh. The foundations under the posts consist of a concrete footing on micropiles.

The staircase is 13.80m long and 2m wide. The low level is at 149.55 NGF and the high level at 155.80 NGF.

Structural Engineering
© B+G
© B+G
© Michel Denancé