[Java4Jay]

[llevrok]

Ping for later

[granite]

Perhaps these bars were moulded, not extruded.

[headstamp 2]

Guesses are, to stop them spinning or maybe they are CAST steel or iron and that is the mold ridge.

[Java4Jay]

The only thing I can think of is to prohibit the bar from being rotated causing wear.

[UnwashedPeasant]

"I recalled from my youth seeing the same type bars"

You must have been a tough kid.

[lee martell]

I DARE Alex Trebek to ask such an obscure question on Jeopardy! You’d have the Big Winners giving each other blank stares and goofy grins. They only get what? five seconds to guess before the beeper sounds.

[dakine]

Reflective movie.. Howard Tyler/Frank Lovejoy could have been me (except, I’m better looking)...

[Bob434]

[[Why do some jail cell bars have a ridge on two sides?]]

Because 3 ridges would be overkill?

[Java4Jay]

Correction: Movie was ‘Try and Get Me’

[Eagles6]

Asking for a friend?

[SecondAmendment]

You can see that the horizontal crossbar has a notch cut out in it that the ridge has to key into. My guess is that the tolerance of the notch is very tight and is used to make the door more rigid, since there does not appear to be any welds used around the bars.

[03A3]

Extrusion would be my guess also as to how they are made. I suspect the notches cut in the horizontal flat bar to accomodate the spline on the rod bars keep it from rotating so prisoners cant rotate them making a huge amount of noise.

[heavy metal]

they could’ve been made by ruffles...

[Buttons12]

Fluting is more elegant. :)

It might also be less of a problem to photograph than an unbroken smooth surface. Motion picture camera movement wouldn’t be captured as easily.

[biggerten]

https://youtu.be/6uKlDRX3PQ8

[Fester Chugabrew]

While we are answering r.e. odd details in physical objects, why are the slots on 30-packs of beer offset from center?

[GingisK]

It prevents rotating the bars in order to loosen them.

[matt1234]

A piece of rebar has two ridges as well, so it will not twist within the concrete that the rebar is reinforcing. Maybe the theory is the same with the bars of a jail cell. If the bars did not have ridges, an inmate could twist them, and progressively weaken the concrete surrounding the bars.

[husky ed]

Worked for two different Police Depts as a Police Jailer.
Both had those same types of bars for the cells and also for the windows in the isolation cells. Never asked about the construction of the bars and 40 years later, still don’t care.

Ed

[ALASKA]

Which do you prefer?