In the section Additional Rules, under Dungeons/Doors it states: "Often the easiest way to overcome a
recalcitrant door is not by demolishing it but by breaking
its lock, bar, or hinges. When assigning a DC to an attempt
to knock a door down, use the following as guidelines..."
Then, under Dungeons/Hinges it states: "The break DC for
a hinge is the same as for breaking down the door."
You might want to consider using the "smash" to mean "chop apart with weapon" and the word "break" to mean "force open with strength." Because right now the word seems to mean both.