They consist of two DC04 steel coupling brackets, a rectangular S235JR steel tube to which is welded in various sections.
Or a coupled S275 JR steel profile (various sections) depending on the load bearing capacity required.
Holes are drilled in the hook brackets to allow for the installation of an anti-unhooking device for the beams.
length from 1000 to 4000 mm
tube sections 60/80 mm thickness 2 mm
coupled profile sections 100/120/140 thickness 1.5 mm