The present invention relates to a structural set for the assembly of a header intended for harvesters, comprising technical, constructive and functional aspects capable of promoting the tilting adjustment of the header in order to improve the accuracy levels of the angle of attack of the cutting discs during harvesting. More particularly, the present invention refers to a structural set for the assembly of a header in agricultural machines comprising a girder formed by a central beam on which a support is provided for suitable fitting of the structure of the header, the central beam being anchored to the chassis of the agricultural machine by an actuator device and further connecting at least two support columns, which are pivoted on the chassis of the agricultural machine by fastening device(s).
