Lattice-form support beam and solar tracker having such a beam

A lattice support beam of triangular cross section comprising:

• a set of three longitudinal members extending in parallel along a main direction of extent of the beam,
• a plurality of triangular assemblies distributed along the main direction of extent and each extending in a plane perpendicular to said main direction of extent, each triangular assembly being formed by three crossmembers mechanically connecting the longitudinal members in pairs,
• a plurality of tie rods each mechanically connecting the longitudinal members in pairs while extending between two consecutive triangular assemblies,
• a plurality of fastening plates fastened to the longitudinal members, each fastening plate fastened to a given longitudinal member among the three longitudinal members comprising a first flat flange and a second flat flange extending radially with respect to said given longitudinal member, the first flat flange forming a first fastening surface for the removable fastening of one end of a first crossmember among said plurality of crossmembers, of one end of a first tie rod and of one end of a second tie rod among said plurality of tie rods, and the second flat flange forming a second fastening surface for the removable fastening of one end of a second crossmember among said plurality of crossmembers, of one end of a third tie rod and of one end of a fourth tie rod among said plurality of tie rods,
• wherein the end of the first crossmember, the end of the first tie rod and the end of the second tie rod are fastened together by a single first bolting system comprising a fastening screw passing through one and the same fastening orifice of the first flat flange, and in that the end of the second crossmember the end of the third tie rod and the end of the fourth tie rod are fastened together by a single second bolting system comprising a fastening screw passing through one and the same fastening orifice of the second flat flange.