Kew Bridge Steam Museum
Now called the London Museum of Water & Steam.
Green Dragon Lane, Brentford, Middlesex, TW8 0EN.
An outstanding collection of working steam engines
One of the two cast iron beams on the 1869 Harvey '100-inch' Cornish engine cracked in 1879. The beams were modified by installing 'bridles' over the crown of the beams, and fitting wrought iron 'straps' round the beams. These straps are large forgings, made off site, and tightened by tapered cotters. A remarkable undertaking. Similar reinforcement was applied to all four large beam engines at Kew Bridge.
See here for a description of the 1837 wrought iron roof structure.