The phrase "iron staircase" refers to a staircase that is made out of iron, a strong and durable material.
Sentences with «iron staircase»
Elegant 2 / story foyer with double wrought iron staircase. (zillow.com)
You'll be blown away as you walk into the large, open foyer facing the wrought iron staircase. (bloomingtonhomes.com)
Wrought iron staircase leads to full finished basement w / big dry bar, full bath, and another finished room for what ever you desire! (bloomingtonhomes.com)