Lattice girder of metal for construction of a spanning and/or support construction, which is constructed from a plurality of individual parts of metal, comprising a plurality of elongate post tubes (21; 21.1, 21.2), a plurality of elongate cross members (22; 22.1, 22.2) and at least one diagonal element (23; 23.1, 23.2), wherein each post tube (21; 21.1, 21.2) of the post tubes (21; 21.1, 21.2) extends in the direction of its longitudinal axis (26; 26.1, 26.2), wherein the cross members (22; 22.1, 22.2) each extend in the direction of the longitudinal axis (27; 27.1, 27.2), wherein the at least one diagonal element (23; 23.1, 23.2) extends in the direction of its longitudinal axis between diagonally opposite corner regions (53.1, 53.2; 53.3, 53.4) of the lattice girder (120.1, 120.2), of which a first corner region (53.1) is formed by a first post tube (21.1) of the post tubes (21; 21.1, 21.2) and a first scaffolding bar (22.1) of the scaffolding bars (22; 22.1, 22.2) and of which a second corner region (53.2) is formed by a second post tube (21.2) of the post tubes (21; 21.1, 21.2) and a second cross member (22.2) of the cross members (22; 22.1, 22.2), wherein in the mounted state of the lattice girder (120.1, 120.2) the first cross member (22.1) is a component of a lower chord (101.1, 101.2) of the lattice girder (120.1, 120.2) and the second cross member (22.2) is a component of an upper chord (102.1, 102.2) of the lattice girder (120.1, 120.2), wherein the post tubes (21; 21.1, 21.2), the cross members (22; 22.1, 22.2) and at the least one diagonal element (23; 23.1, 23.2) are connected together, wherein a rigid framework (100.2) of metal is detachably connected with the first post tube (21.1) and with the second post tube (21.2) in such a way that in the mounted state of the lattice girder (120.2) the first post tube (21.1) is supported at or on the framework (100.2) and the second post tube (21.2) is supported at or on the framework (100.2), wherein the framework (100.2) comprises a first cross strut, which extends in the direction of its longitudinal axis and which in the mounted state of the lattice girder (120.2) forms a lower chord section of the framework (100.2), wherein the framework (100.2) comprises a second cross strut, which extends in the direction of its longitudinal axis and which in the mounted state of the lattice girder (120.2) forms an upper chord section of the framework (100.2), and wherein the framework (100.2) comprises a plurality of support struts (107; 107.1, 107.2, 107.3, 107.4, 107.5, 107.6, 107.7), which extend between the first cross strut and the second cross strut in the direction of the respective longitudinal axis thereof, of which several or all or substantially all support struts are fixedly welded by the support strut ends thereof not only to the first cross strut, but also to the second cross strut, and the longitudinal axis of the first cross strut and the longitudinal axis of the second cross strut include an acute angle, characterised in that at least two or at least three connecting elements for connection of scaffolding components and/or with scaffolding components at a mutual spacing corresponding with an integral multiple of a grid dimension of a modular scaffolding are fixedly welded to each post tube (21; 21.1, 21.2), that the connecting elements are rosettes for connection of and/or with connecting heads of scaffolding components, that a first connecting element (119.1), which extends in the direction of a first connecting element axis (121.1), for the first post tube (21.1) and a second connecting element (119.2), which extends in the direction of a second connecting element axis (121.2), for the second post tube (21.2) are so fixedly welded to the second cross strut at a mutual connecting element spacing that the first connecting element (119.1) and the second connecting element (119.2) extend away from the second cross strut in the same direction, and that the first post tube (21.1) is detachably secured to the first connecting element (119.2) and the second post tube (21.2) is detachably secured to the second connecting element (119.2).