steel girder style sectional bridge system 28mm gaming - wargaming3d miniature bridges make great objectives bolt action scenarios designed file represent generic did so potentially allow any length crossing you may want single span measure approx 8 plus access ramps fdm printing have two options one flat edge butt against straight road piece elongated s mates created available free down load https wwwwargaming3dcom product interlocking-wargaming-road-system please sure use appropriate using friction fits into ramp well optional centre section which can placed water has 2mm thick base cna used left off support level whatever material surface longest bridge's side main frame exactly 200 mm long should fit most printers pieces per do not glued its your choice leave then remove blown example