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 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 of said plate being extended by side panels forming said first bolt guiding ramp and said second bolt guiding ramp . <EOS>