Why aren't 2x4's in fact 2" x 4"? ...

Where Can I Get Octagon Picnic Table Blueprints?
Answers:    They start out as 2" X 4" then are milled smooth so you can pedal them without getting your hand ripped up by the raw saw cut lumber.
How do I bonnet sour a toilet pipe?
They be back when they be hand made. Now that you enjoy new saw mills it basically comes out like they do immediately. Y don't they change the describe? No idea.