Maximum Floor Slope

Another consideration regardless of the amount of slope is whether there is structural damage in the home or only cosmetic damage.

Maximum floor slope.

It is usually 1 8 to 1 4 per foot. Shower floor slope to efficiently drain the recommended minimum slope for a shower floor is about 4 percent or a 1 2 inch drop per every 12 inches from the shower walls to the drain. Floor slopes shall be reasonably uniform and comply with 5 6 1 through 5 6 3. Your figure of 1 4 per foot doesn t sound bad.

When they poured my garage slab in my last house i asked em to slope it a lot. So during the winter melted snow and rain would puddle there and freeze. The building code requires that a garage floor be sloped towards the door but does not specify a minimum slope. 5 6 1 the slope of the floor from the shallow end wall towards the deep area shall not exceed 1 foot in 7 feet 30 cm.

Here is the citation from the international residential code irc. 5 6 2 changes in slope between shallow and deep. Floor testing testing on slopes. Nearly all will say that if a floor slopes 1 and 1 2 inches in twenty feet or more that there should be further investigation.

But they got one low spot right where i got out of my car. It stands to reason that the steeper the slope then the more likely you are to slip on that slope yet one of the biggest mistakes we see is a lack of understanding that a slope on a floor requires an increase in the slip resistance value srv also know as the pendulum test value ptv. Aci 117 90 st andard 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. 213 cm to the point of the first slope change as shown in figure 5.