Looking at the gas holders around Kings Cross they all have two separate dates for erected and telescoped. What's the difference between the two, the telescoped date is often 20 years or so after the erected date?
At a guess it's when they were originally built as rigid types (that didn't expand or contract) and then converted at the later date to telescoping types.
Looking at the gas holders around Kings Cross they all have two separate dates for erected and telescoped. What's the difference between the two, the telescoped date is often 20 years or so after the erected date?