This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Brunel balloon flange girders. Sections through Brunel's balloon flange girders From the left Experimental girder Chepstow Railway Bridge was similar South Wales Railway Eastern Bengal Railway Cumberland Basin bridges Windsor Railway Bridge Note that all girders are to approximately the same scale except for the Windsor truss that