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.
Irc code garage floor slope.
Appliances located in private garages shall be installed with a minimum clearance of 6 feet above the floor.
Here is the citation from the international residential code irc.
2009 2012 2015 and 2018 international residential code irc section r309 2 carports.
International building code 406 2 9.
Everything i ve read says slope it 1 8 to 1 4 inch per foot toward the garage door.
Appliances located in a garage or carport shall be protected from impact by automobiles.
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.
The slab has to be at least 3 5 thick and possibly thicker for expansive or other difficult soils.
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.
7 inches sounds like too much both visually and from a walkability standpoint so the most i m going to consider is 3 5.
It is usually 1 8 to 1 4 per foot.
A single door shall be allowed provided the sources of ignition in the appliance are at least 18 inches 457 mm above the floor.
The building code requires that a garage floor be sloped towards the door but does not specify a minimum slope.
2018 international residential code chapter 3 building planning 2 instructor gil rossmiller in the construction industry for over 40 years icc irc plumbing mechanical code development committee icc commercial energy code development committee.
Asphalt surfaces shall be permitted at ground level in carports.
Its more than just forms and pouring concrete.