exterior door knobs on a house
We're swapping out door hardware on all of our interior and exterior doors at the house, and I noticed that all the outside door hardware is knobs instead of levers (which is what I have on the inside). The front door has a typical thumb lever entry with lower handle on the outside, and with a lever on the inside. The garage and back doors have round knobs on the outside and levers on the inside.
So is using round knobs on exterior access doors some sort of building code, or just a measure home builders take to reduce the likelihood than an animal can open a door?
1976 FJ40 - green and mostly stock
1996 FZJ80 - not so stock