Mechanical Arch by Roy Kitchin (1983)
Extract from the Public Monuments & Sculpture Association:
A gantry-like structure suggestive of the forms of Cleveland’s steel rolling mills and Tees Transporter Bridge. The whole work is painted blue and stands at an angle between the entrance gates and the gallery.
The piece cost £8,000, £5,500 of which came from Cleveland Councty Council, £1,400 from Northern Arts and the rest along with materials from British Steel.(1)
See more here.