Compensating for Something
...Err, yes, actually! Thermal expansion, to be honest... The saga of bench installation and 'finishing off' continues. The steel-topped bench, for which we dug into the rock in our previous post ("Benches" from 13th April), saw the holes being marked out for drilling. This ought to have been very simple, working from below and marking through the pre-cast concrete legs, to leave a mark on the underside of the soleplate. But, this being Kirkby Stephen, it was sat in a puddle, which needed bailing out first! Having duly accomplished this, we found that the marker did not fit through the holes! Fortunately, it was possibly to mark the holes from above, by alignment and measurement... We then placed the two compensators in position and used a string line to get the alignment correct in relation to the rest of the rodding run. The marker was then used to pick out the centres for the holes we required drilling. A centre punch was then used, so the marks getting rubbed off...