Please help out elderly or vulnerable neighbors.Leave snow or ice on stairways or fire escapes.

A great example for a soft-story is on a 3 story 10-unit apartment, the first floor only contains only 1 column per unit, open all way concrete garage, then in front of the cars is only a stairway to the second floor, second floor and maybe third contains the living spaces. 

Is there any law for minimum width for stairway? 

Its access is via a ladder-like stairway (if that makes sense, kind of halfway between the two) and I wonder if the loft will create liability issues although there are very good handrails there is still an edge that someone could conceivably fall off of if they were being extremely careless.

There's no rear exit so it may have to be cut and brought up a narrow stairway.

Of course he will need them not to use any stairs for a week because you don't want them walking through a construction zone but it might be only a few days for a stairway and then most of the work is on your level.   

The Premises are comprised of Tenant's dwelling unit, as well as any common areas, including, but not limited to entryways, patios, yards, community rooms, hallways, basement, laundry room, stairways, balconies, decks, and garage.D) Tenant to Promote Smoke-free Policy and to Alert Landlord of Violations.

This was an open and large apartment where every unit had a balcony or in my case patio that led to the yard and the doors were all in an open stairway. 

The HVAC for the first floor unit supplies conditioned air into the common hallway/stairway.

I'm trying to envision how that would even work or what it would look like...Yes here 2 exits to the 'ground' are required so we were lucky to have the 2 stairways in place from days of old.