Stone block Railroad tie
stone block kilmarnock , troon railway.
the type of railroad tie used on predecessors of first true railway (liverpool , manchester railway) consisted of pair of stone blocks laid ground, chairs holding rails fixed blocks. 1 advantage of method of construction allowed horses tread middle path without risk of tripping. in railway use ever heavier locomotives, found hard maintain correct gauge. stone blocks in case unsuitable on soft ground, such @ chat moss, timber ties had used. bi-block ties tie rod similar.
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