The side plates are connected to the bracing rods by flanges cast in to the plates and very substantial cotter pins secured in place by iron wedges.
Cross braces are secured to the vertical posts by means of an inverted U piece, held tightly by opposing iron wedges. Very effective and the only tool required was a hammer.
Just two of the corner braces were adjustable by means of barrel bolts.
A close up of the overflow pipe - bell ended rather like a locomotive chimney. We need to conserve this and the other pipework, and maybe use them for drainage once we establish if this is viable.
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