Interior garage floor!
Interior garage floor!
(OP)
Does an interior garage floor slab - concrete slab on grade - need to slope for drainage? Is there any specific requirement on this in ACI? I would appreciate your help.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: Interior garage floor!
1). Yes, you should slope it
2). In some localities you are not permitted to have a floor drain unless it is tied to sanitary sewer, NOT storm (which I think is ridiculous).
3). If you are in a cold/snow area and are required to slope the floor out towards the garage door (floor drain not permitted), be prepared to have your garage door freeze shut and tear the weather stripping off when you open it!!!!
RE: Interior garage floor!
RE: Interior garage floor!
My preference was always to slope the floor to the center of each bay and install a drain in the center. This drain was then run to the same location as the downspout roof drains....or storm sewer. Many places do not allow this because of potential contaminants from the garage floor. However, I can see no difference between my truck leaking gas on my garage floor and making it into the storm sewer vs. my truck leaking gas directly onto the road!
I guess there needs to be such rules to keep people from doing foolish things like pouring motor oil into their garage floor drain.
RE: Interior garage floor!
RE: Interior garage floor!
Point well take though...
RE: Interior garage floor!
Most cities in this area (StL) want about a 2'' drop in 20' or so.
RE: Interior garage floor!
Some like to wash their garage floors too. Same idea.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Interior garage floor!
Seismicpe,
See 2006 IBC 406.2.6. The code requires that the floor be sloped to drain or main entrance, but it doesn't specify a minimum slope.
RE: Interior garage floor!
RE: Interior garage floor!
Other considerations; seal the floor, use individual drains under each vehicle if at all possible, especially in cold snowy areas, use insulation and/or vapor barrier under slab especially if it is a higher end type garage, we even have people installing radiant heat in garage slabs.
RE: Interior garage floor!