7 inches sounds like too much both visually and from a walkability standpoint so the most i m going to consider is 3 5.
Typical garage floor slope.
Everything i ve read says slope it 1 8 to 1 4 inch per foot toward the garage door.
A 2 slope will probably ensure better drainage we could also find no slope tolerance for use when a floor slope is specified.
1 attach one end of the string level to the wall of the garage furthest from the main door.
The apron extends the width of the garage floor.
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.
The apron s length depends on the required slope more length is needed to reduce steep slopes.
The apron in front of the garage smooths the transition for the vehicle from the driveway into the garage and acts as a barrier to debris and moisture.
Aci 117 90 standard specifications for tolerances for concrete construction and materials gives a level alignment tolerance of 3 4 inch for top of slab elevation of slabs on grade.
Minimums are limited to 8 feet 2 inches for van accessible structures and 7 feet for standard parking entrances.
Determine the ramp slope based on the requirements of the structure through los considerations and the expressed purpose of the garage.
Determining the angle of your floor s slope provides a simple method to level work surfaces in the garage.