Why don’t dwarves use bins in stockpiles

dwarf-fortress

In the Finished Goods Stockpile #30 below, I've set the Max Bin option to 260, but my dwarves are still not using bins to store the stone crafts, though I can see they have 156 free bins available from the Stock screen. Why is it?

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Best Answer

I'll make the assumption that you're intrested in making the dwarves use the bins and not just curious about the inner machinations of their tipsy minds.

From my experience and a bit of research, dwarves are more prone to binning if the bins are stored in a furniture stockpile rather than clogging up a workshop.