Questions & Answers about В подъезде на лестнице скрипят перила, и мне неприятно за них держаться.
They give two layers of location:
- в подъезде = in the entrance/stairwell area of an apartment building (the general place).
- на лестнице = on the staircase / on the stairs (more specific: the railings that belong to the stairs). Russian often stacks location phrases from general → specific.
After в meaning “in/inside (a location)” Russian uses the prepositional case:
- подъезд → в подъезде The ending -е is a common prepositional ending for masculine nouns.
на is used for “on” surfaces and also for certain locations by convention (like на улице, на лестнице).
лестнице is also prepositional case (because it answers “where?”):
- лестница → на лестнице