After a blitz on rust and scale, the frames of Barnum no.228 advanced in a sequence that allows for the floor timbers to be reinstalled and the next stage of assembly of newly machined and shaped teak boards to be fitted. Since these floor timbers were placed originally in 2002 when the Barnum was in outside storage, the wood has dried out and shrunk as it has been in a very dry atmosphere for some time. This has left the screw heads proud of the floor level and needing countersink and replacement when the below level work is completed by the restoration team.
Thanks to the persistence and determined work of Keith Simpson and Andrew Coalwood, the frames are almost completely protected from future exposure to the elements. Previously in service they were of course subjected to the corrosive effect other various discharges from the cloak and lavatory units. What has been uncovered in the removal of the floor is that one bogie has suffered badly from corrosion and structural damage resulting in bad distortion of a vital steel cross-member. That’s a big expense to come.
The main steel frames, and eventually the bogie frames too, will be similarly protected with coats of iron oxide or equivalent and the black stuff, which during the very recent freeze would just not liquefy sufficiently to be brushed on.
Photos – courtesy Andrew Coalwood
1. Frames exposed beneath the floor to enable corrosion protection work.
2. Shots reveal the distorted steel of the bogie frame