Is there a particular reason why most prison doors’ bars are vertical?

Question

I would assume horizontal bars would make it stronger because they will have to be shorter (assuming normal door proportions)

EDIT: I mean cell doors

EDIT 2: Ok so its a combo of reasons like making it harder to punch thru the bars, exchange goods, use weight to bend the bars, and no climbing to prevent WWE scenarios. Aight thanks guys

In: Other

Answer 1

Former prisoner here. It may not be the same for other places, but in Utah they had completely done away with barred cells and switched to concrete/cinderblock walls with a reinforced D2 utility steel door with a bulletproof glass view port. The only part of the prison that had bars was the intake block that used to be the old deathrow building back in the 40s and 50s. You typically only stayed in that building a week or less before they moved you to population. Other than that, I never encountered bars during my entire stay. I suppose whether or not bars were vertical or horizontal, switching to the new format gives less chance of escape or physical contact with prisoners who may be more dangerous than others or who are having a public freak out.