Guidelines
The National Building Code (Canada) stipulates guidelines for constructing buildings and various structures, including decks.
The minimum height of the railing is based on the height of the deck. Railings are required when a deck is 24" above grade.
- Under 24" – Railing is optional
- 24" to 5' 10" – Railing height: 36" minimum. Distance between posts: 96" maximum.
- 5' 10" and over – Railing height: 42" minimum. Distance between posts: 60" maximum.
The maximum allowable distance between balusters and between the bottom rail and the floor of the deck is 4".
The treads of a stairway should be no less than 9 ¼" deep and the risers no more than 8" high.