[kdmccormick]

> I can’t control if my neighbor blocks the stairwell with a couch that gets stuck while he’s moving in and now I have no egress if my other neighbor starts a fire.

That is an extremely specific situation!

> How is double stair MFH overzealous?

There is a cost to every regulation. The cost to this one is that housing is more expensive for all Americans. Stress, poverty, and homelessness all lead to negative health outcomes. Taken as a whole, those negative outcomes may very well outweigh the fire safety benefits of double-stair (which have never been proven to exist).

> I’m in favor of greater freedoms, and the freedom to choose a single stair MFH if I want. > But I don’t want.

Right, so it sounds like you are in favor of removing the double-stair regulation?

[hammock]

>That is an extremely specific situation!

It’s an example. Can you generalize it or should I?

[kelseyfrog]

Here's a hypothetical for a two-stairwell building: two couches.

We can avoid this dangerous scenario with a three-stairwell minimum requirement.

[hammock]

Good point. Why do we even bother with two-lane roads and a double yellow line? Such a waste of space. Very contrived to presume there is always a car coming the other way

[kdmccormick]

You're comparing a situation that happens all the time (opposing traffic) with one that happens extremely rarely (blocked stairwell in a fire). If anything, you're strengthening my point.

We should design for situations to a level that is appopriate given their frequency and severity. Show me evidence that MANDATING the extra stairwell justifies the huge increase in national housing cost, and I'll concede.

[kelseyfrog]

Sorry, but the only thing that will change my mind is a significantly casualty different between single stairwell and dual-stairwell buildings accounting for building age, construction type, property value, and occupant demographics.

Happy to hear evidence-based arguments.

[sunshowers]

The US would certainly be a nicer place to live if there were more roads with just one lane, like many older cities and suburbs already have.

[matsemann]

Why would you need two lanes in each direction, except perhaps on a highway..? I agree, such a waste of space.

[Paradigma11]

I just dont think it would really help that often. It is not the stairwells that are burning, it is some appartment on a floor below. Your problem is going to be smoke and visibility, not some couch blocking the stair. If those stairs are connected, you will most likely have smoke everywhere and will have no clue if one stair is safer than the other.