NY code and garage floor elevation

[GeneDavis]

Where is the code reference found in NY Residential (or IBC) that stipulates this?  All I can find is that the gathering floor is to be sloped.  

[kMoquin]

A change in elevation in not required in the IRC. (Can't speak for NY codes)

[Alaskan_Son]

The only garage elevation related code I know of is with regard to ignition sources within 18" of the garage floor. 

[MikeCSD]

The State of NY has not amended that code section.

 

https://up.codes/viewer/new_york/irc-2015/chapter/3/building-planning#R309

[rgardner]

Flood plane area?

[Greg_NY61]

Same for NJ IRC 2018

 

R309.1 Floor surface

Garage floor surfaces shall be of approved noncombustible material.

The area of floor used for parking of automobiles or other vehicles shall be sloped to facilitate the movement of liquids to a drain or toward the main vehicle entry doorway.

[BILL88]

Heres your answer. See snip attached. Also link to NY State residrntial bldng code pdf > https://www.dos.ny.gov/DCEA/pdf/pdf/2020 Residential Code of New York State.pdfNy   Code is mostly plagurization of IBC which states that all grades must be a minimum 2% slope away from structures. So 2% slope at your garage entry.

[CARMELHILL]

Me and a friend also, always thought there was a requirement for a 4" step down into a garage to prevent CO2 creeping into living space. We tried to find it one day and couldn't.

 

It might have been in the older NYS Code from "pre" international code days.

[MikeCSD]

On 4/18/2020 at 2:07 PM, BILL88 said:

Heres your answer. See snip attached. Also link to NY State residrntial bldng code pdf > https://www.dos.ny.gov/DCEA/pdf/pdf/2020 Residential Code of New York State.pdfNy   Code is mostly plagurization of IBC which states that all grades must be a minimum 2% slope away from structures. So 2% slope at your garage entry.

Bill, I respectfully disagree with you, you cannot apply IBC codes to a structure that is governed by the IRC. R101.2 specifically states that 1 and 2 family dwellings shall be constructed under the IRC. R309.1 doesn't provide a minimum slope. R401.3 provides a minimum slope of grade away from the structure (6" within the first 10'), but that doesn't apply to garage floors. There is also no code section in the IRC that states there must be a 4" elevation drop in a garage, it does not exist. You also cannot apply a code that was in effect years ago, you can only apply the code that is in effect at the time the permit is issued. You have to be very careful when interpreting codes, you can't take requirements from one section and apply it to another without a code path. You should also make sure that there aren't any state amendments of a particular code section, which could greatly alter requirements.

[Alaskan_Son]

Don’t forget that there are commonly plumbing, gas/fuel, and mechanical codes that also govern many of these things and that almost always override anything you might find in the general building code.  

[MikeCSD]

IRC requirements can be overruled by manufacturer's installation instructions, you are 100% correct.

 

R102.4 Referenced codes and standards. The codes and standards referenced in this code shall be considered part of the requirements of this code to the prescribed extent of each such reference and as further regulated in Sections R102.4.1 and R102.4.2.

Exception: Where enforcement of a code provision would violate the conditions of the listing of the equipment or appliance, the conditions of the listing and manufacturer’s instructions shall apply.

 

R102.4.1 Conflicts. Where conflicts occur between provisions of this code and referenced codes and standards, the provisions of this code shall apply.

 

R102.4.2 Provisions in referenced codes and standards. Where the extent of the reference to a referenced code or standard includes subject matter that is within the scope of this code, the provisions of this code, as applicable, shall take precedence over the provisions in the referenced code or standard.