Floor system, a vehicle, such as a service vehicle, comprising such a floor system and a method of installing such a floor system

A floor system configured to be arranged on an inner floor of a cargo or a back space of a service vehicle, said floor system comprising:

• a first and a second prefabricated floor section, each one of said first and said second floor sections including
• a floor panel, said floor panel including a first edge and a second edge, wherein said first edge is arranged opposite said second edge, said first and said second floor sections configured to be arranged next to each other such that said second edge of said floor panel of said first floor section is placed facing and adjacent to, or in contact with said first edge of said floor panel of said second floor section, and
• a separate first integrated securing rail fixedly attached to a third edge of said floor panel, said third edge extending at a right angle from said first edge to said second edge-of said floor panel,
• wherein said separate first integrated securing rail includes, at one end, a positioning member, and at an other end, a mutually matching opening, such that at least one positioning member of a separate first integrated securing rail of said first floor section is configured to connect said separate first integrated securing rail of said first floor section with a mutually matching opening of a separate first integrated securing rail of said second floor section to connect the separate first integrated securing rails of the first and second floor sections to each other in a longitudinal direction of the service vehicle;
• and
• a floor portion, the floor portion smaller than said first floor section and/or said second floor section, said floor portion including a first outer edge which follows a contour of said separate first integrated securing rail of said first and/or said second floor section and which is configured to be placed adjacent to or in contact with said separate first integrated securing rail of said first and/or said second floor section during use.