A strike structure for a locking device of a gate leaf, said gate leaf being able to pivot about a pivoting axis, to allow it to be open on either side of at least one closing position, said locking device comprising a bolt structure integral with said gate leaf, said bolt structure comprising a locking element that is movable between an extended position and a retracted position to allow the cooperation thereof with said strike structure and to ensure the locking of said gate leaf in at least one closing position, said strike structure comprising a first bolt accommodation adapted to cooperate with said locking element of said bolt structure, a second bolt accommodation adapted to cooperate with said locking element of said bolt structure, and a fixed stop means for said locking element of the bolt structure, located between said first bolt accommodation and said second bolt accommodation, said strike structure also comprising: - a first bolt guiding ramp located on the side of said first bolt accommodation that is opposed to said fixed stop means, and - a second bolt guiding ramp located on the side of said second bolt accommodation that is opposed to said fixed stop means, characterized in that said strike structure comprises a strike base comprising a flat plate provided with an opening in the central portion of which is attached an added member forming said fixed stop means, said fixed stop means dividing said opening into two parts to form said first bolt accommodation and said second bolt accommodation, the lateral sides (763, 764) of said plate being extended by side panels forming said first bolt guiding ramp and said second bolt guiding ramp. said gate leaf being able to pivot about a pivoting axis, to allow it to be open on either side of at least one closing position, said locking device comprising a bolt structure integral with said gate leaf, said bolt structure comprising a locking element that is movable between an extended position and a retracted position to allow the cooperation thereof with said strike structure and to ensure the locking of said gate leaf in at least one closing position, said strike structure comprising a first bolt accommodation adapted to cooperate with said locking element of said bolt structure, a second bolt accommodation adapted to cooperate with said locking element of said bolt structure, and a fixed stop means for said locking element of the bolt structure, located between said first bolt accommodation and said second bolt accommodation, said strike structure also comprising: - a first bolt guiding ramp located on the side of said first bolt accommodation that is opposed to said fixed stop means, and - a second bolt guiding ramp located on the side of said second bolt accommodation that is opposed to said fixed stop means, - a first bolt guiding ramp located on the side of said first bolt accommodation that is opposed to said fixed stop means, and - a second bolt guiding ramp located on the side of said second bolt accommodation that is opposed to said fixed stop means, characterized in that said strike structure comprises a strike base comprising a flat plate provided with an opening in the central portion of which is attached an added member forming said fixed stop means, said fixed stop means dividing said opening into two parts to form said first bolt accommodation and said second bolt accommodation, the lateral sides (763, 764) of said plate being extended by side panels forming said first bolt guiding ramp and said second bolt guiding ramp.