Hi hal depends on how good your finishing technique is.
Garage floor drain pitch.
Calculate your slope from there to the outer edge of your room.
Getting ready to pour a garage floor slab.
When the concrete floor is pitched to a floor drain all the water runs into the drain keeping the floor dry.
A garage drain is also great for rinsing and cleaning the garage floor so all the dirty water doesn t end up on the driveway.
You need 1 4 inch of slope for every linear feet of floor space.
A smooth accurate slope 1 8 per foot will drain fine.
If you work like me 1 4 per foot is a better rate to aim for.
For household sinks the drain pipe diameter is often either 1 5 or 2.
Yes the pipe needs some pitch also.
The floor drain controls the flow of water preventing damage and unnecessary dirt buildup.
Everything i ve read says slope it 1 8 to 1 4 inch per foot toward the garage door.
Having a drain installed with the correct pitch to the floor allows water dripping off your car or from rain falling outside especially important in particularly rainy areas to flow.
The recommended slope for flat roofs is usually 1 1 8 inch per foot or 2 1 4 inch per foot according to the professional handbook of building construction published by john wiley sons new york.
Toilet waste lines are often 3 or 4.
Without a drain water just puddles and sits on the floor until it evaporates or is wiped up.
How to use the calculator.
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.
First figure out the diameter of the pipe you are working with.
The following diagram lays out the different terms that are used in the calculator.
Drain pipe slope calculator.
7 inches sounds like too much both visually and from a walkability standpoint so the most i m going to consider is 3 5.
