Bryan Posted December 17, 2009 Report Share Posted December 17, 2009 Is their a standard recommendation for the minimum amount of slope for on grade concrete porches and stoops? Bryan Link to comment Share on other sites More sharing options...
Mike Lamb Posted December 17, 2009 Report Share Posted December 17, 2009 Yes. IRC R401.3 6" over a 10' run with some exceptions. Link to comment Share on other sites More sharing options...
Bryan Posted December 17, 2009 Author Report Share Posted December 17, 2009 Yes. IRC R401.3 6" over a 10' run with some exceptions. I looked at that and was not sure it would apply? If so, under the exceptions, the slope would be 2% given that most concrete is impervious. Bryan Link to comment Share on other sites More sharing options...
Chris Bernhardt Posted December 17, 2009 Report Share Posted December 17, 2009 I generally wouldn't cite the 2%. I would just tell them to slope it to ensure positive drainage. Hard to argue with that, but boy they sure will argue over a stupid number. Chris, Oregon Link to comment Share on other sites More sharing options...
Bryan Posted December 17, 2009 Author Report Share Posted December 17, 2009 I generally wouldn't cite the 2%. I would just tell them to slope it to ensure positive drainage. Hard to argue with that, but boy they sure will argue over a stupid number. Chris, Oregon I agree. The development was a two year old apartment complex. Each of the patio and entrance stoops were installed level and essentially even with the interior floor slab. It does not take much water to find its way back into the units, or in freezing conditions to heave the slab and create a trip hazard. In this same area last year I saw a sidewalk heave 2 1/2 to 3 inches at the entrance to the office area. They ended up tearing it out and replacing it after everything thawed out. Bryan Link to comment Share on other sites More sharing options...
Mike Lamb Posted December 17, 2009 Report Share Posted December 17, 2009 Yes. IRC R401.3 6" over a 10' run with some exceptions. I looked at that and was not sure it would apply? Bryan It would apply if you are to follow IRC. Grade is the finished ground next to the outside walls whether it's sidewalk, dirt, patio or whatever. Link to comment Share on other sites More sharing options...
Chad Fabry Posted December 17, 2009 Report Share Posted December 17, 2009 Is their a standard recommendation for the minimum amount of slope for on grade concrete porches and stoops? Porches and stoops aren't at grade. 6" over 10' is a ADA ramp. Link to comment Share on other sites More sharing options...
Bryan Posted December 17, 2009 Author Report Share Posted December 17, 2009 Is their a standard recommendation for the minimum amount of slope for on grade concrete porches and stoops? Porches and stoops aren't at grade. 6" over 10' is a ADA ramp. Chad, Do you mean that since this is the entrance into an apartment it has to meet ADA specs in its slope? Bryan Link to comment Share on other sites More sharing options...
Chad Fabry Posted December 17, 2009 Report Share Posted December 17, 2009 My bad..I just fully read what you wrote... where I'm from porches and stoops are always above grade. FTR, stoop means step so by default it'd be above grade. If it's at grade then it's 6" over 10 feet like Mike said. Link to comment Share on other sites More sharing options...
Brandon Whitmore Posted December 17, 2009 Report Share Posted December 17, 2009 On any exterior concrete surfaces I stick to a 2% grade recommendation. What's the point in having a 5% grade when water is gonna drain either way? Plus, the more slope you have on the concrete, the more chance someone will slip and fall under the right conditions. Link to comment Share on other sites More sharing options...
Jim Katen Posted December 17, 2009 Report Share Posted December 17, 2009 Is their a standard recommendation for the minimum amount of slope for on grade concrete porches and stoops? Bryan The IRC specified a minimum 2% grade for those items in the exceptions under 401.3. If the surface is a landing or tread of a stairway, it can't be any steeper than 2% per 311.5.5. - Jim Katen, Oregon Link to comment Share on other sites More sharing options...
Nolan Kienitz Posted December 17, 2009 Report Share Posted December 17, 2009 IRC covers one & two family dwellings. Be sure you look at correct code book for "apartments". Link to comment Share on other sites More sharing options...
Rocon Posted December 18, 2009 Report Share Posted December 18, 2009 How often do youu inspect apartments? Who is your client (the tenant)? Link to comment Share on other sites More sharing options...
kurt Posted December 18, 2009 Report Share Posted December 18, 2009 .................given that most concrete is impervious. Bryan Are you saying most concrete is water proof? Link to comment Share on other sites More sharing options...
Bryan Posted December 18, 2009 Author Report Share Posted December 18, 2009 .................given that most concrete is impervious. Bryan Are you saying most concrete is water proof? By no means; however, I believe that is is more impervious than lots of other materials. When I used to work in the green houses industry we had acres and acres of porous concrete floors. If you could keep them clean water would run right through. Bryan Bryan Link to comment Share on other sites More sharing options...
Bryan Posted December 18, 2009 Author Report Share Posted December 18, 2009 How often do youu inspect apartments? Who is your client (the tenant)? This was actually the third complex in six weeks. Previous to that it had been awhile due to the banking and lending issues out their. These PCA inspections are for lenders, investors and sometimes buyers. I do them for a local company which I do other commercial work for. This one was about six hours from my base and an over night trip. Bryan Link to comment Share on other sites More sharing options...
Jim Katen Posted December 18, 2009 Report Share Posted December 18, 2009 IRC covers one & two family dwellings. Be sure you look at correct code book for "apartments". Good point. The numbers, however, remain the same. The IBC says that exterior landings at doors shouldn't slope more than 1/4" per foot (2% slope). (1008.1.4) Impervious surfaces near the building have to slope at least 2% per 1803.3. So there really isn't any window. They should be *at* 2%. - Jim Katen, Oregon Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now