The requirement for two stairways is simply a safety issue in the event of fire. That being so, if one goes to a single stairway for units are there other safety factors that would be required and, if so, would those other requirements lead to increased costs? Alternatively, if there are no additional safety factors, has there been any studies to determine the potential reduction in safety by "x %" due to a single stairway?
Finally, in my jurisdiction, it seems to me that most residential buildings of six or fewer stories are primarily built of wood. Is that the best construction material if single stairways are utilized?
Hmmmmm .....
The requirement for two stairways is simply a safety issue in the event of fire. That being so, if one goes to a single stairway for units are there other safety factors that would be required and, if so, would those other requirements lead to increased costs? Alternatively, if there are no additional safety factors, has there been any studies to determine the potential reduction in safety by "x %" due to a single stairway?
Finally, in my jurisdiction, it seems to me that most residential buildings of six or fewer stories are primarily built of wood. Is that the best construction material if single stairways are utilized?