vsl international is a worldwide swiss based construction company that develops post tensioning systems for structural concrete and is owned by the large french construction company bouygues . contents 1 history 2 structure 3 products 4 see also 5 references 6 external links history edit the swiss construction company losinger founded pr contrainte sa in 1954 in french speaking lausanne which made equipment for the prestressing of reinforced concrete . structure edit it is headquartered in german speaking k niz in the canton of bern in switzerland . it publishes its in house magazine vsl news . in 2009 daniel rigout was appointed chairman and chief executive 1 a former deputy chief executive of bouygues b timent international . the company has 34 subsidiaries around the world with around 3 900 employees including around 900 engineers and technicians . 2 it has two technical centres . products edit it has recently provided much cable tensioning equipment of cable stayed bridges across the world . it has provided concrete tensioning for baluarte bridge in mexico the highest cable stayed bridge in the world 3 the dubai mall the world s largest incheon bridge south korea kai tak cruise terminal nh t t n bridge vietnam r ch mi u bridge vietnam stonecutters bridge tarban creek bridge australia wadi leban bridge saudi arabia it provided heavy lifting with hydraulic jacks for fifteen segments of the cms detector of the large hadron collider it designs and builds systems known as the vsl system to incrementally launch bridges . 4 see also edit category cable stayed bridges references edit bouygues november 2009 vsl heavy lifting bridges incremental launch external links edit vsl retrieved from https en.wikipedia.org w index.php title vorspann system losinger & oldid 683896616 categories 1954 establishments in switzerlandbouyguesbridge companiescompanies based in lausannecompanies established in 1954concrete pioneersconstruction and civil engineering companies of switzerlandk nizstructural steel navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version languages fran ais edit links this page was last modified on 3 october 2015 at 06 16 . text is available under the creative commons attribution sharealike license ; additional terms may apply . by using this site you agree to the terms of use and privacy policy . wikipedia is a registered trademark of the wikimedia foundation inc. a non profit organization . privacy policy about wikipedia disclaimers contact wikipedia developers cookie statement mobile view