When does an egress window well need a ladder or steps?
Window wells deeper than 44 in must have a permanently fixed ladder or steps (IRC R310.2.3.1).
If the window well is more than 44 inches deep, it must have a permanently attached ladder or steps so an occupant can climb out, usable with the window in its fully open position.
The ladder or rungs must be at least 12 inches wide, project at least 3 inches from the wall, and be spaced no more than 18 inches apart vertically. These egress ladders are exempt from the usual stairway and ramp requirements.
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