By way of comparison, the Royal Border Bridge, with relatively lightweight and specifically designed gantries: https://upload.wikimedia.org/wikipedia/commons/9/

By way of comparison, the Royal Border Bridge, with relatively lightweight and specifically designed gantries: https://upload.wikimedia.org/wikipedia/commons/9/93/60163_Tornado_7_March_2009_Berwick.jpg https://upload.wikimedia.org/wikipedia/commons/9/93/60163_To...