LEGO 10307 Eiffel Tower was too big for standard tests during the build process

The LEGO Group had to devise a cunning new way to test LEGO Icons 10307 Eiffel Tower, as it was just too big for the usual methods.

All LEGO sets are put through various tests during the design process to make sure they are up to the LEGO Group's high standards. For example, the heat tests require LEGO sets to be placed inside an industrial-sized oven in order to emulate conditions that can make LEGO elements yellow over time. However, this presented some challenges to the team working on 10307 Eiffel Tower.

"This doesn't fit an industrial-sized oven, because we do have to heat test them to simulate the yellowing of LEGO elements," explained LEGO designer Rok Žgalin Kobe in an interview with LEGO YouTuber Tim Johnson. "For the heat testing challenge, it was split apart into its parts."

Rok demonstrates how the tower can be relatively easily broken down into three parts, each presumably its own step in the building process.

Of course, splitting the set down into three parts added its own complications to how the LEGO Group needs to approach heat tests. For a truly accurate test, these three parts needed to weigh the same as they would when combined into one towering build.

"But then it had to be weighed down to simulate the rest," he smiles. "So it was tested separately and then [each part was] weighted."

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