During the HBA summator installation we discovered one tile lid that was partially fractured. We suspect this was from loading too many people on what may have already been a weak lid. Having found the crack, we removed it and tested to see where it would break and, if so, how. Here is the result.
A fractured tile is subjected to additional pressure.
Overall, the system has held up remarkable well. The LOFAR tiles turn out to survive the Arctic environment very well.