I was reading "Illustrated Cabinetmaking" and came across this: "Where a horizontal board tops an upright, the biscuits should be offset". It does not explain why. Does anyone know?
The next sentence says: "Likewise, biscuits used in joining a shelf to an upright should be located below center to increase the shelf's resistance to toploading". Does anyone know what toploading is?
Here's the illustration in the book for both of the above: