1. Welcome to the new and improved Building Code Forum. We appreciate you being here and hope that you are getting the information that you need concerning all codes of the building trades. This is a free forum to the public due to the generosity of the Sawhorses, Corporate Supporters and Supporters who have upgraded their accounts. If you would like to have improved access to the forum please upgrade to Sawhorse by clicking here: Upgrades
    Dismiss Notice

exterior stair code.

Discussion in 'Residential Building Codes' started by Remington, Mar 20, 2020.

  1. Remington

    Remington Registered User

    Joined:
    Apr 16, 2018
    Messages:
    28
    Likes Received:
    1
    In the city of Los Angeles, are the exterior stairs codes different than interior stairs?

    The architect is saying that the stair treads need to be 12" from nose to nose.
    My understanding is that it can be 10" nose to nose. This means measured from riser to nose it's 11"

    Also, she is saying that there needs to be a clearance of 3' from the bottom edge of the stairs to the garage door opening.
    We never use the garage for cars and I would prefer to have the edge of the stairs be as close to the garage door as much as possible. Is this allowed here in the city of Los Angeles? I cant seem to find anything in the codes that wont allow me to do this.
    [​IMG]

    [​IMG]
     
  2. Remington

    Remington Registered User

    Joined:
    Apr 16, 2018
    Messages:
    28
    Likes Received:
    1
  3. Pcinspector1

    Pcinspector1 Platinum Member

    Joined:
    Oct 28, 2009
    Messages:
    3,241
    Likes Received:
    465
    I take this to mean: The door requires a 3-ft minimum landing and that you must have less than the required landing.
     
  4. Remington

    Remington Registered User

    Joined:
    Apr 16, 2018
    Messages:
    28
    Likes Received:
    1
  5. Pcinspector1

    Pcinspector1 Platinum Member

    Joined:
    Oct 28, 2009
    Messages:
    3,241
    Likes Received:
    465
    Is the driveway at the same level as the stair landing? Intersting
     
  6. Pcinspector1

    Pcinspector1 Platinum Member

    Joined:
    Oct 28, 2009
    Messages:
    3,241
    Likes Received:
    465
    Interesting, if tha stairway was any further your landing would be the driveway.
     
  7. Remington

    Remington Registered User

    Joined:
    Apr 16, 2018
    Messages:
    28
    Likes Received:
    1
    yes landing is same level as driveway. We do not use the garage.
     
  8. Pcinspector1

    Pcinspector1 Platinum Member

    Joined:
    Oct 28, 2009
    Messages:
    3,241
    Likes Received:
    465
    We, being you or your family, but when you sell the home that new family may use that garage. I hope we're building structures for time.

    We sold a house that my wife and two children live in for 24 years. We were required to install a radon fan system to sell the house, so now the new family benefits from it's use. That chapped me a bit!
     
  9. Remington

    Remington Registered User

    Joined:
    Apr 16, 2018
    Messages:
    28
    Likes Received:
    1
    we plan to make the garage an ADU a year from now and we have ample parking. We do not need the garage.
     
  10. mark handler

    mark handler Sawhorse

    Joined:
    Oct 25, 2009
    Messages:
    10,601
    Likes Received:
    871
    Is this a Single family or multi family unit?
     
  11. Remington

    Remington Registered User

    Joined:
    Apr 16, 2018
    Messages:
    28
    Likes Received:
    1
    Single family house
     
  12. Remington

    Remington Registered User

    Joined:
    Apr 16, 2018
    Messages:
    28
    Likes Received:
    1
    We want the edge of the first stair tread to be at the edge of the garage door opening. The landing in essence will be part of driveway. We will eventually convert the garage to an Adu in the future so the garage is not necessary. The notion that this house will be sold to another family is a non issue
     
  13. ICE

    ICE Moderator

    Joined:
    Jun 23, 2011
    Messages:
    8,794
    Likes Received:
    1,053
    This is California code. LA City might vary.

    R311.7.5.2 Treads. The tread depth shall be not less than 10 inches. The tread depth shall be measured horizontally between the vertical planes of the foremost projection of adjacent treads and at a right angle to the tread’s leading edge. The greatest tread depth within any flight of stairs shall not exceed the smallest by more than 3/8 inch.


    R311.7.5.3 Nosings. Nosings at treads, landings and floors of stairways shall have a radius of curvature at the nosing not greater than 9/16 inch or a bevel not greater than 1/2 inch. A nosing projection not less than 3/4 inch and not more than 1-1/4 inches shall be provided on stairways. The greatest nosing projection shall not exceed the smallest nosing projection by more than 3/8 inch within a stairway.


    Exception: A nosing projection is not required where the tread depth is not less than 11 inches.



    R311.7.6 Landings for stairways. There shall be a floor or landing at the top and bottom of each stairway. The width perpendicular to the direction of travel shall be not less than the width of the flight served. For landings of shapes other than square or rectangular, the depth at the walk line and the total area shall be not less than that of a quarter circle with a radius equal to the required landing width. Where the stairway has a straight run, the depth in the direction of travel shall be not less than 36 inches.


    Exception: A floor or landing is not required at the top of an interior flight of stairs, including stairs in an enclosed garage, provided that a door does not swing over the stairs.


    R311.7.7 Stairway walking surface. The walking surface of treads and landings of stairways shall be sloped not steeper than one unit vertical in 48 inches horizontal (2-per- cent slope).

    While I can understand the premise that the space can't be both a landing and a driveway, I also understand the opposite argument. Note the maximum slope requirement of 1/4" per foot.

    My decision would be to not allow the landing to be part of the driveway. Your information about converting the garage to an ADU has no bearing.
     
    #13 ICE, Mar 20, 2020
    Last edited: Mar 20, 2020
    ADAguy likes this.
  14. mark handler

    mark handler Sawhorse

    Joined:
    Oct 25, 2009
    Messages:
    10,601
    Likes Received:
    871
    "...minimum tread depth shall be 10 inches..."
    You need an unobstructed level landing at the top and bottom. A car is an obstruction. I would not allow it.
     
  15. Remington

    Remington Registered User

    Joined:
    Apr 16, 2018
    Messages:
    28
    Likes Received:
    1
    But a car will not be parked at the bottom landing. The garage door doesn't even swing out. It rolls up. Where in the code does it say the landing can not be part of the driveway?
     
    Glenn likes this.
  16. ICE

    ICE Moderator

    Joined:
    Jun 23, 2011
    Messages:
    8,794
    Likes Received:
    1,053
    Where in the code does it say it can? The space can't serve as a driveway and a landing at the same time. That you will not use the space as a driveway does not change the facts.

    If you obtain a permit to convert the garage to an ADU now, you can place the landing where to want it. But to bet on the future is not how the building department operates.
     
    #16 ICE, Mar 20, 2020
    Last edited: Mar 20, 2020
  17. Remington

    Remington Registered User

    Joined:
    Apr 16, 2018
    Messages:
    28
    Likes Received:
    1
    Since it's neither yes or no. Why not yes?
     
  18. ICE

    ICE Moderator

    Joined:
    Jun 23, 2011
    Messages:
    8,794
    Likes Received:
    1,053
    I am mean.
     
  19. Pcinspector1

    Pcinspector1 Platinum Member

    Joined:
    Oct 28, 2009
    Messages:
    3,241
    Likes Received:
    465
    I don't enforce the CBC but I believe you have the answer and I agree with the ruling handed down.

    I also think that the property could become someone else's property issue in the future.
     
  20. mark handler

    mark handler Sawhorse

    Joined:
    Oct 25, 2009
    Messages:
    10,601
    Likes Received:
    871

Share This Page