(57) The present invention relates to a metal lattice girder made with wire and/or rod
iron (1, 2, 3) of homogeneous and non-homogeneous cross section, of varied lateral
structural composition, having the characteristic of being such as to hook up by means
of the bent portions (7) of the lateral spacers (20) and combinable with arc-welded
wire netting having square or rectangular meshes (17, 18). The tongs (19) with a claw
hook (21) catch the upper longitudinal wire (1) of the lattice girder for transporting
the girder and press laterally on the lateral spacers (20), bending them inwardly
to allow them to be set down onto the wire (17) and guide the coupling of the bent
portions (7) with the parallel wires (18) of the arc-welded steel mesh. This is achieved
by releasing the force on the tongs (19) and, with the springback of the sides of
the lattice girder, the terminals of the spacers hook up with the wires (18) of the
mesh, locking in place and thereby forming a combined three-dimensional structure
consisting of the wire lattice girder and arc-welded steel mesh.
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