If you're installing your steps into an existing attic hatchway, you may have to expand the hole.
camera della cornpagna, the storeroom for provisions on board ship, is the use of "companion" for the framed windows over a hatchway on the deck of a ship, and also for the hooded entrance-stairs to the captain's cabin.
As I was stationed but a short distance from the main hatchway, I could catch a glance at all who were carried below.
We slipped through the small hatchway into total blackness.
Next to the turret base a large hatchway (7) provides access to the space behind the secondary armament.