He started walking around the corridor to the main stairwell.

There are also laundry facilities in the main stairwell that serves the building.

Until further notice, you are ordered to use the main stairwell and access ladders only.

"You know the way back to the main stairwell?"

Off to the right were the elevators and the main stairwell.

Alone now, he found the main stairwell and began making his way down.

The names of these people are now represented on a plaque in the main stairwell.

In the main stairwell, there are a number of large oil paintings.

The main stairwell that led to the upper levels was off to his left.