26th October 2019


How wide do stairs need to be?

Stair Width: 36 Inches Minimum (Not Including Handrails) Translated: This means that any stairs must be at least 3 feet wide, measured from side to side as if you are walking up or down the stairs.

Just so, how far apart do steps need to be?

This allows enough space for the average foot to step comfortably and safely.
  1. As a rule of thumb, the width of the treads and risers added together should equal between 16–18 inches (41–46 cm).
  2. So, if your riser is 7 inches (18 cm) tall, your tread should be anywhere from 9–11 inches (23–28 cm) long.

What is a standard stair tread size?

The riser shall be measured vertically between leading edges of the adjacent treads. The greatest riser height within any flight of stairs shall not exceed the smallest by more than 3/8 inch (9.5 mm). R311.7.4.2 Tread depth. The minimum tread depth shall be 10 inches (254 mm).
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