Irc Code Garage Floor Slope

The building code requires that a garage floor be sloped towards the door but does not specify a minimum slope.

Irc code garage floor slope.

It is usually 1 8 to 1 4 per foot. Asphalt surfaces shall be permitted at ground level in carports. A single door shall be allowed provided the sources of ignition in the appliance are at least 18 inches 457 mm above the floor. If bollards or stanchions are not installed then the unit must be raised 6 feet above the garage floor per irc g2408 3 305 5.

2009 2012 2015 and 2018 international residential code irc section r309 2 carports. The area of floor used for parking automobiles shall be sloped to facilitate the movement of liquids to a drain or toward the main vehicle entry doorway. Connection of a parking garage with any room in which there is a fuel fired appliance shall be by means of a vestibule providing a two doorway separation. Everything i ve read says slope it 1 8 to 1 4 inch per foot toward the garage door.

The garage is 28 ft deep so 1 8 to 1 4 inches per foot means the slab shoub be 3 5 to 7 inches higher at the end opposite the door. Getting ready to pour a garage floor slab. The international residential code irc lays out a series of requirements for pouring a concrete slab on grade. Its more than just forms and pouring concrete.

7 inches sounds like too much both visually and from a walkability standpoint so the most i m going to consider is 3 5. Here is the citation from the international residential code irc. Appliances located in a garage or carport shall be protected from impact by automobiles. International building code 406 2 9.