Objects that separate when under heavy stress

Hello!

If I wanted to have, let’s say, 8 blocks in a row, and wanted them to function in a way that they would for a single object (=if I pout it over a large gap it stay there, instead of some of those blocks falling into it), but if I dropped a heavy objects, let’s say, 500kg, on it, the “stick” would break in half. How would I do that?

Thanks, -DoctorPC

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