Replies

1. 
   b0bb0 | Apr 17, 2020 10:02am | #1

   Yes where I live.
   I split a 20 x 40 garage to make a 20 x 20 garage on one end and a 20 x 20 room that is attached to the house.
   The city said I needed a 3 -1/2 high and wide (at least) concrete curb to prevent spilled gas and other liquids from getting into the room. I drilled a 1/2" hole in the slab and epoxied galvanized anchor bolts into the hole. I cut it to length so the top of the threaded end would be about 4-1/2" above the concrete curb's top. I did this every 3 feet, but I think 6' is enough. Check your local rules. (You could also use and expanding anchor bolts.)
   When it was cured, I built the wall on the curb with foam between concrete and wood.

2. 
   scoutm38 | Apr 17, 2020 11:39am | #2

   Thanks--so--you end up with a curb between areas?
   that,s what did in boiler HVAC room-that I put in the garage for code.
   I guess I was hoping for a way to have a flat floor for wheelchair use--
1. 
   jlyda | Apr 17, 2020 11:49am | #3

   You should be able to do this. I’ve done it for multiple projects. My code authority allows for it. You will need to have a door that seals and separates the garage from the house. We usually install after market threshold extensions that are tapered to allow for roiling over more easily. If you have a custom door being built they can probably build a wheelchair accessible threshold, but that will be a pricey item. Or you may find you can wheel over standard threshold with little effort. They allow for the wall (curb as you are saying) to have a door cutout, but should check with code authority first.

3. 
   BMan | Apr 17, 2020 01:44pm | #4

   Most building codes are based on the International Residential Code. Years ago there was a requirement for a vertical separation between garage and living area, but it went away- I think with the 2009 version. Depending on where you live, the base IRC code may be adjusted by your state, or local jurisdiction. In NY, no vertical separation is required.

4. 
   Plumb13 | Apr 18, 2020 04:39pm | #5

   I have no experience with this or what the code requirements are, but it seems like a channel drain would be a perfect solution.

5. 
   Mike_Augustine | Apr 19, 2020 10:03am | #6

   When I researched this in 2016 I found there's no specific requirement for a step or a curb, but the floor should be sloped down towards the exterior doors.

6. 
   scoutm38 | May 10, 2020 01:58pm | #7

   Thanks-- I need to check with my town--