Teesside Steel

You may be aware that the trusses of Dorman Long steel which we are replacing on Marley Hill shed were supplied part riveted in the 1930s.   A Teesside foundry, steel fabricator & loco builder featured on this blog in January 2014 was Head Wrightson.    I recently found another of their structures west of Edinburgh:

Builder's plate showing this to be an early structure from Head Wrightson .....

..... on a munitions-handling pier added to 15th century Blackness Castle on the Forth

Did Head Wrightson supply the trusses for Marley Hill shed in the 1930s?

Is there more extant early Teesside industrial engineering, beyond the Tyne & Sydney Harbour bridges & later oil industry structures?