This is a girder which was produced in Middlesbrough by Dorman, Long Company, a company set up by 2 local business men, Arthur Dorman and Albert de Lande Long in 1876.
By 1900 this company employed over 3,000 workers and by 1914 the workforce grew to over 20,000.
Dorman Long built the Sydney Harbour Bridge in Australia in 1922 – one of the most famous bridges in the world.