What Minimum Height for Deck Railings?

Types

• Railings for residential decks require a height of 3 feet from the floor of the deck to the rail top surface, as mandated by the IRC. Commercial railings necessitate a higher railing at 42 inches, as regulated by the IBC.

Considerations

• Another specification for railings include rail spacing that is less than 4 inches apart, making sure that a ball or sphere of 4 inches in diameter cannot push in between for safety parameters.

Helpful Tips

• Any deck that is 30 inches or more above ground must have a railing, as well as a building permit for that deck, if it is an addition to a building. If a deck is below 30 inches, it is the owner's choice to install railings, though they still must adhere to the mandated rules.