Flooring system provided with a connecting system and an associated connecting device

A decking system comprising:

• floor elements, and a connecting system comprising a connecting device for connecting first and second floor elements of the floor elements, said connecting device being removably connectable to a support member,
• wherein the connecting device comprises a first and a second connecting portion,
• wherein an edge portion of the first and second floor elements comprises a first and a second engagement portion, respectively,
• the first and the second connecting portions being configured to cooperate with the first and the second engagement portions, respectively, for vertically locking the first and second floor elements, and
• wherein the connecting device further comprises a displaceable portion which is horizontally displaceable,
• the connecting device being configured to assume a first and a second horizontal state, a horizontal extension of the connecting device in said second horizontal state being smaller than a horizontal extension of the connecting device in said first horizontal state,
• wherein in said first horizontal state:
• the first and second floor elements are vertically locked, and
• the first connecting portion and/or the second connecting portion extend(s) essentially in parallel with a top side and/or an underside of the floor elements,
• wherein in said second horizontal state:
• a strength of a vertical locking, by the connecting device, of a pair of floor elements in the decking system is reduced compared to a strength of the vertical locking of said pair of floor elements in the first horizontal state,
• and wherein the connecting device further comprises a locking device for locking the connecting device in said second horizontal state, the locking device comprising a first and a second locking element configured to cooperate with each other.