Final answer:
Guidelines for window well stairs or ladders suggest they should be at least 15 inches wide, project at least 15 inches away from the wall, and have steps spaced no more than 18 inches apart for safety.
Step-by-step explanation:
When considering the dimensions for window well stairs or ladders, practical safety guidelines should be followed. The steps should be wide enough to provide a stable footing and spaced appropriately to ensure ease of ascent and descent. Although there is no clearly specified standard presented in the question, referencing the provided clues, one could interpret the necessary width as at least 15 inches wide. The steps should project out enough from the wall to allow for safe footing; using the 'rule of thumb,' this might be as much as 15 inches away from the wall, ensuring enough space to avoid tripping hazards or discomfort while using the ladder or stairs. Moreover, the steps should be spaced no more than 18 inches apart to prevent overreaching and to provide a comfortable rhythm while climbing.
According to newer guidelines, window well stairs or ladders should be at least 8 diameters (15 inches) wide and project at least 15 diameters (30 inches) away from the wall. The steps should be spaced out no more than 8 diameters (15 inches) apart.