Actually, our 30m columns are NOT 30m exactly. They are 30.5m. But that’s why it’s important to use the technique that Michelle describes to get an ACCURATE column length, at the beginning of installation, and then throughout the life of the column.

Jack

]]>If counting loops is not preferred, another way to measure length is to weigh the column. Balances are accurate, the cage has same weight that can be deducted, so if we know the mass/length we can measure it..

]]>